WHIZARD Generator - DESYreuter/downloads/2018_MBI_WHIZARD.pdf · J.R.Reuter Status of WHIZARD MBI...
Transcript of WHIZARD Generator - DESYreuter/downloads/2018_MBI_WHIZARD.pdf · J.R.Reuter Status of WHIZARD MBI...
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22
Jürgen R. Reuter, DESY
Status of theWHIZARD Generator
1
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 2WHIZARD: Some (technical) facts
WHIZARD Team: Wolfgang Kilian, Thorsten Ohl, JRRSimon Braß/Vincent Rothe/Christian Schwinn/Marco Sekulla/So Young Shim/Pascal Stienemeier/Zhijie Zhao +
2 Master
General WHIZARD reference: EPJ C71 (2011) 1742, arXiv:0708.4241
O’Mega (ME generator): LC-TOOL (2001) 040; arXiv:hep-ph/0102195
VAMP (MC integrator): CPC 120 (1999) 13; arXiv:hep-ph/9806432
CIRCE (beamstrahlung): CPC 101 (1997) 269; arXiv:hep-ph/9607454
Parton shower: JHEP 1204 (2012) 013; arXiv:1112.1039
Color flow formalism: JHEP 1210 (2012) 022; arXiv:1206.3700
NLO capabilities: JHEP 1612 (2016) 075; arXiv: 1609.03390
Parallelization of MEs: CPC 196 (2015) 58; arXiv:1411.3834
POWHEG matching: EPS-HEP (2015) 317; arXiv: 1510.02739
WHIZARD v2.6.4 (23.08.2018) http://whizard.hepforge.org <[email protected]>
PUBLICATIONS
Programming Languanges: Fortran2008 (gfortran ≥4.8.4), OCaml (≥3.12.0) Standard installation: configure <FLAGS>, make, [make check], make installLarge self test suite, unit tests [module tests], regression testingContinous integration system (gitlab CI @ Siegen)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 3WHIZARD: Introduction / Technical Facts
• Universal event generator for lepton and hadron colliders
• Tree ME generatorO’Mega optimized ME generator
Interfaces to external packages: FastJet, GoSam, GuineaPig(++), HepMC, HOPPET, LCIO, LHAPDF(5/6), LoopTools, OpenLoops, PYTHIA6 [internal], PYTHIA8, Recola, StdHep [internal], Tauola [internal]
• Generator/simulation tool for lepton collider beam spectra: CIRCE1/2
• Event formats: LHE, StdHEP, HepMC, LCIO + several ASCII
Scattering processes and [auto-] decays
Factorized processes with spin correlations [variants: no correlations, definite helicity,
predefined branching ratios]
Scripting language for the steering: SINDARIN
Beam structure: polarization, asymmetric beams, crossing angle, structured beams, decays
beams = e1, E1 beams_pol_density = @(-1), @(+1) beams_pol_fraction = 80%, 30%
beams = p, pbar => lhapdf $lhapdf = “NNPDF3”
beams = e1, E1 => circe2 => isr => ewa
integral (br_hZA_redef) = 200 keV
NEW
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 4Spin Correlation and Polarization in CascadesCascade decay, factorize production and decay
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?diagonal_decay = true ?isotropic_decay = true
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 4Spin Correlation and Polarization in CascadesCascade decay, factorize production and decay
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?diagonal_decay = true ?isotropic_decay = true
unstable “W+” { decay_helicity = 0 }Possibility to select specific helicity in decays!
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 5 e+e− Beamspectra
e+e� ! µ̃+µ̃�
3 TeV
Courtesy to Philipp Roloff
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 5 e+e− Beamspectra
High-energy e+e- colliders need to achieve extreme luminositiesPrice for limited AC power: high bunch charges and tiny cross sectionsDense beams generate strong EM fields: deflect particles in other bunch (beamstrahlung)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 5 e+e− Beamspectra
High-energy e+e- colliders need to achieve extreme luminositiesPrice for limited AC power: high bunch charges and tiny cross sectionsDense beams generate strong EM fields: deflect particles in other bunch (beamstrahlung)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 6Inclusive Lepton Collider ISR includedSoft exponentiation to all orders
Gribov/Lipatov, 1971✏ =
↵
⇡q2e ln
⇣ s
m2
⌘
f0(x) = ✏ · (1� x)�1+✏
Hard-collinear photons up to 3rd QED order
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 6Inclusive Lepton Collider ISR includedSoft exponentiation to all orders
Gribov/Lipatov, 1971✏ =
↵
⇡q2e ln
⇣ s
m2
⌘
f0(x) = ✏ · (1� x)�1+✏
Hard-collinear photons up to 3rd QED order
Kuraev/Fadin, 1983; Skrzypek/Jadach, 1991
f3(x) = g3(✏) f0(x)�✏
2(1 + x)
� ✏2
8
✓1 + 3x2
1� xlnx+ 4(1 + x) ln(1� x) + 5 + x
◆
� ✏3
48
✓(1 + x)
⇥6Li2(x) + 12 ln2(1� x)� 3⇡2
⇤+ 6(x+ 5) ln(1� x)
+1
1� x
3
2(1 + 8x+ 3x2) lnx+ 12(1 + x2) lnx ln(1� x)
�1
2(1 + 7x2) ln2 x+
1
4(39� 24x� 15x2)
�◆
g3(✏) = 1 +3
4✏+
27� 8⇡2
96✏2 +
27� 24⇡2 + 128⇣(3)
384✏3 ⇣(3) = 1.20205690315959428539973816151 . . .
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 6Inclusive Lepton Collider ISR includedSoft exponentiation to all orders
Gribov/Lipatov, 1971✏ =
↵
⇡q2e ln
⇣ s
m2
⌘
f0(x) = ✏ · (1� x)�1+✏
Hard-collinear photons up to 3rd QED order
Kuraev/Fadin, 1983; Skrzypek/Jadach, 1991
f3(x) = g3(✏) f0(x)�✏
2(1 + x)
� ✏2
8
✓1 + 3x2
1� xlnx+ 4(1 + x) ln(1� x) + 5 + x
◆
� ✏3
48
✓(1 + x)
⇥6Li2(x) + 12 ln2(1� x)� 3⇡2
⇤+ 6(x+ 5) ln(1� x)
+1
1� x
3
2(1 + 8x+ 3x2) lnx+ 12(1 + x2) lnx ln(1� x)
�1
2(1 + 7x2) ln2 x+
1
4(39� 24x� 15x2)
�◆
g3(✏) = 1 +3
4✏+
27� 8⇡2
96✏2 +
27� 24⇡2 + 128⇣(3)
384✏3 ⇣(3) = 1.20205690315959428539973816151 . . .
[from J.-J. Blaising]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 7Phase Space Integration
WHIZARD algorithm: heuristics to classify phase-space topology, adaptive multi-channel mapping ⟹ resonant, t-channel, radiation, infrared, collinear, off-shell
Complicated processes: factorization into production and decay with the unstable option
Resonance-aware factorization for NLO processes and parton showers (e.g. e+e− → jjjj)
Integration display
?vis_history = true
- VAMP: adaptive multi-channel Monte Carlo integrator - VAMP2: fully MPI-parallelized version, using RNG stream generator
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 8MPI Parallelization
Event generation trivially parallelizable Major bottleneck: adaptive phase space integration (generation of grids) Parallelization of integration: OMP multi-threading for different helicities since long NEW (after v2.5.0/2.6.4): MPI parallelization (using OpenMPI or MPICH) Distributes workers over multiple cores, grid adaption needs non-trivial communication Amdahl’s law:
Speedups of 10 to 30, saturation at O(100) tasks Integration times go down from weeks to hours! [can do also parallel event generation]
s = 11�p+ p
N
Braß/Kilian/JRR, soon-ish
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 9 LHC VBS: Comparison LO & LO+PSBallestrero et al., 1803.07943
10-4
10-3LO
dσ/d
mj 1j
2 [fb/
GeV
]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
10-4
10-3
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000Ratio
/MoC
aNLO
+Rec
ola
mj1j2 [GeV]
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000
0
0.1
0.2
0.3
0.4
0.5LO
dσ/d
Δy j 1
j 2 [fb]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
0
0.1
0.2
0.3
0.4
0.5
0.9
1
1.1
3 4 5 6 7 8 9Ratio
/MoC
aNLO
+Rec
ola
Δyj1j2
0.9
1
1.1
3 4 5 6 7 8 9
LOLO+PS
pT,` > 20 GeV |y`| < 2.5 �R`` > 0.3
pT,miss > 40 GeV
Anti-kT jets with R = 0.4:
pT,j > 30 GeV |yj | < 4.5 �R`j > 0.3
mjj > 500 GeV |�yjj | > 2.5<latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit>
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 9 LHC VBS: Comparison LO & LO+PSBallestrero et al., 1803.07943
10-4
10-3LO
dσ/d
mj 1j
2 [fb/
GeV
]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
10-4
10-3
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000Ratio
/MoC
aNLO
+Rec
ola
mj1j2 [GeV]
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000
0
0.1
0.2
0.3
0.4
0.5LO
dσ/d
Δy j 1
j 2 [fb]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
0
0.1
0.2
0.3
0.4
0.5
0.9
1
1.1
3 4 5 6 7 8 9Ratio
/MoC
aNLO
+Rec
ola
Δyj1j2
0.9
1
1.1
3 4 5 6 7 8 9
LOLO+PS
pT,` > 20 GeV |y`| < 2.5 �R`` > 0.3
pT,miss > 40 GeV
Anti-kT jets with R = 0.4:
pT,j > 30 GeV |yj | < 4.5 �R`j > 0.3
mjj > 500 GeV |�yjj | > 2.5<latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit>
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 9 LHC VBS: Comparison LO & LO+PSBallestrero et al., 1803.07943
10-4
10-3LO
dσ/d
mj 1j
2 [fb/
GeV
]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
10-4
10-3
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000Ratio
/MoC
aNLO
+Rec
ola
mj1j2 [GeV]
0.9
1
1.1
500 1000 1500 2000 2500 3000 3500 4000
0
0.1
0.2
0.3
0.4
0.5LO
dσ/d
Δy j 1
j 2 [fb]
BONSAY
MG5_aMC
MoCaNLO+Recola
PHANTOM
POWHEG
VBFNLO
WHIZARD
0
0.1
0.2
0.3
0.4
0.5
0.9
1
1.1
3 4 5 6 7 8 9Ratio
/MoC
aNLO
+Rec
ola
Δyj1j2
0.9
1
1.1
3 4 5 6 7 8 9
LOLO+PS
pT,` > 20 GeV |y`| < 2.5 �R`` > 0.3
pT,miss > 40 GeV
Anti-kT jets with R = 0.4:
pT,j > 30 GeV |yj | < 4.5 �R`j > 0.3
mjj > 500 GeV |�yjj | > 2.5<latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit><latexit sha1_base64="0ogN2lf5YUV+jlU4JKdDZXQSBFk=">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</latexit>
First official use of MPI-parallelized phase space & first published application of WHIZARD & HERWIG showering
cf. talk by Marco Zaro
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 10Keep resonances in ME-PS merging
• Problem: e+e− → jjjj not dominated by highest αs power, but by resonances e+e− → WW/ZZ → (jj)(jj)
• Solution: proper merging with resonant subprocesses by means of resonance histories • WHIZARD v2.6.0: option to set resonance histories
?resonance_history = true resonance_on_shell_limit = 4
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 10Keep resonances in ME-PS merging
• Problem: e+e− → jjjj not dominated by highest αs power, but by resonances e+e− → WW/ZZ → (jj)(jj)
• Solution: proper merging with resonant subprocesses by means of resonance histories • WHIZARD v2.6.0: option to set resonance histories
?resonance_history = true resonance_on_shell_limit = 4
#jets
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 10Keep resonances in ME-PS merging
• Problem: e+e− → jjjj not dominated by highest αs power, but by resonances e+e− → WW/ZZ → (jj)(jj)
• Solution: proper merging with resonant subprocesses by means of resonance histories • WHIZARD v2.6.0: option to set resonance histories
?resonance_history = true resonance_on_shell_limit = 4
#jets
#particles
# vis. particles
#photons
E (photon)
#charged tracks
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 10Keep resonances in ME-PS merging
• Problem: e+e− → jjjj not dominated by highest αs power, but by resonances e+e− → WW/ZZ → (jj)(jj)
• Solution: proper merging with resonant subprocesses by means of resonance histories • WHIZARD v2.6.0: option to set resonance histories
?resonance_history = true resonance_on_shell_limit = 4
#jets
#particles
# vis. particles
#photons
E (photon)
#charged tracks
• Some first tests started on e+e− → 6j ; future tests will also include tests with resonant H → bb
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 11BSM Models in WHIZARD
Automated models: interface to SARAH/BSM Toolbox Staub, 0909.2863; Ohl/Porod/Staub/Speckner, 1109.5147
Automated models: interface to FeynRules Christensen/Duhr; Christensen/Duhr/Fuks/JRR/Speckner, 1010.3251
MODEL TYPE with CKM matrix trivial CKM
Yukawa test model --- Test
QED with e, µ, ⌧, � --- QED
QCD with d, u, s, c, b, t, g --- QCD
Standard Model SM CKM SM
SM with anomalous gauge couplings SM ac CKM SM ac
SM with Hgg, H��, Hµµ, He+e�
SM Higgs CKM SM Higgs
SM with bosonic dim-6 operators --- SM dim6
SM with charge 4/3 top --- SM top
SM with anomalous top couplings --- SM top anom
SM with anomalous Higgs couplings --- SM rx/NoH rx/SM ul
SM extensions for V V scattering --- SSC/AltH/SSC 2/SSC AltT
SM with Z0
--- Zprime
Two-Higgs Doublet Model THDM CKM THDM
Higgs Singlet Extension --- HSExt
MSSM MSSM CKM MSSM
MSSM with gravitinos --- MSSM Grav
NMSSM NMSSM CKM NMSSM
extended SUSY models --- PSSSM
Littlest Higgs --- Littlest
Littlest Higgs with ungauged U(1) --- Littlest Eta
Littlest Higgs with T parity --- Littlest Tpar
Simplest Little Higgs (anomaly-free) --- Simplest
Simplest Little Higgs (universal) --- Simplest univ
SM with graviton --- Xdim
UED --- UED
“SQED” with gravitino --- GravTest
Augmentable SM template --- Template<latexit 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J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 11BSM Models in WHIZARD
Automated models: interface to SARAH/BSM Toolbox Staub, 0909.2863; Ohl/Porod/Staub/Speckner, 1109.5147
Automated models: interface to FeynRules Christensen/Duhr; Christensen/Duhr/Fuks/JRR/Speckner, 1010.3251
Automated models: UFO interface [new WHIZARD/O’Mega model format]
MODEL TYPE with CKM matrix trivial CKM
Yukawa test model --- Test
QED with e, µ, ⌧, � --- QED
QCD with d, u, s, c, b, t, g --- QCD
Standard Model SM CKM SM
SM with anomalous gauge couplings SM ac CKM SM ac
SM with Hgg, H��, Hµµ, He+e�
SM Higgs CKM SM Higgs
SM with bosonic dim-6 operators --- SM dim6
SM with charge 4/3 top --- SM top
SM with anomalous top couplings --- SM top anom
SM with anomalous Higgs couplings --- SM rx/NoH rx/SM ul
SM extensions for V V scattering --- SSC/AltH/SSC 2/SSC AltT
SM with Z0
--- Zprime
Two-Higgs Doublet Model THDM CKM THDM
Higgs Singlet Extension --- HSExt
MSSM MSSM CKM MSSM
MSSM with gravitinos --- MSSM Grav
NMSSM NMSSM CKM NMSSM
extended SUSY models --- PSSSM
Littlest Higgs --- Littlest
Littlest Higgs with ungauged U(1) --- Littlest Eta
Littlest Higgs with T parity --- Littlest Tpar
Simplest Little Higgs (anomaly-free) --- Simplest
Simplest Little Higgs (universal) --- Simplest univ
SM with graviton --- Xdim
UED --- UED
“SQED” with gravitino --- GravTest
Augmentable SM template --- Template<latexit 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J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 11BSM Models in WHIZARD
Automated models: interface to SARAH/BSM Toolbox Staub, 0909.2863; Ohl/Porod/Staub/Speckner, 1109.5147
Automated models: interface to FeynRules Christensen/Duhr; Christensen/Duhr/Fuks/JRR/Speckner, 1010.3251
Automated models: UFO interface [new WHIZARD/O’Mega model format]
MODEL TYPE with CKM matrix trivial CKM
Yukawa test model --- Test
QED with e, µ, ⌧, � --- QED
QCD with d, u, s, c, b, t, g --- QCD
Standard Model SM CKM SM
SM with anomalous gauge couplings SM ac CKM SM ac
SM with Hgg, H��, Hµµ, He+e�
SM Higgs CKM SM Higgs
SM with bosonic dim-6 operators --- SM dim6
SM with charge 4/3 top --- SM top
SM with anomalous top couplings --- SM top anom
SM with anomalous Higgs couplings --- SM rx/NoH rx/SM ul
SM extensions for V V scattering --- SSC/AltH/SSC 2/SSC AltT
SM with Z0
--- Zprime
Two-Higgs Doublet Model THDM CKM THDM
Higgs Singlet Extension --- HSExt
MSSM MSSM CKM MSSM
MSSM with gravitinos --- MSSM Grav
NMSSM NMSSM CKM NMSSM
extended SUSY models --- PSSSM
Littlest Higgs --- Littlest
Littlest Higgs with ungauged U(1) --- Littlest Eta
Littlest Higgs with T parity --- Littlest Tpar
Simplest Little Higgs (anomaly-free) --- Simplest
Simplest Little Higgs (universal) --- Simplest univ
SM with graviton --- Xdim
UED --- UED
“SQED” with gravitino --- GravTest
Augmentable SM template --- Template<latexit 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by So Young Shimheavily used
for CLIC Yellow Report multi-boson
studies (VVV + VBS)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 12Models from UFO Files in WHIZARDmodel = SM (ufo) UFO file is assumed to be in working directory OR
Old FeynRules / SARAH interface will get deprecated
kept at the moment for user backwards compatibility
All the setup works the same as for intrinsic models
model = SM (ufo (“<my UFO path>”))
All SM-like models/scalar extensions already supportedHigher-dim. operators, general Lorentz/color structures is work in progress
UFO file is in user-specified directory
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 13
Model-independent EFT: either weakly-coupled resonances in reach or strongly-coupled sectors Alboteanu/Kilian/JRR, 0806.4145; Kilian/Ohl/JRR/Sekulla, 1408.6207
Parameterize new physics by dim 6/dim 8 operators, calculate unitarity limits Dim.-8 operators for longitudinal/mixed/transverse modes Brass/Fleper/Kilian/JRR/Sekulla
T-matrix unitarization implemented in WHIZARD (both for operators and resonances)
New Physics in Vector Boson Scattering: LHC
i2
i
aS
a0
aT
T-matrix
��a� aK2
�� = aK2 ) a = 1
Re⇣
1a0
⌘�i
200 400 600 800 1000 1200 1400 1600 1800 2000M(W+W+)[GeV]
10�4
10�3
10�2
10�1
100
101
@�
@M
⇥fb
100G
eV
⇤
pp ! W+W+jj
FS,0 = 480 TeV�4
FS,1 = 480 TeV�4
FHD = 30 TeV�2
SM
200 400 600 800 1000 1200 1400 1600 1800 2000M(W+W+)[GeV]
10�4
10�3
10�2
10�1
100
101
@�
@M
⇥fb
100G
eV
⇤
pp ! W+W+jj
FS,0 = 480 TeV�4
FS,1 = 480 TeV�4
FHD = 30 TeV�2
SM
Unitarity limits
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 14 New Physics in VBS: LHC & Lepton Colliders
Braß/Fleper/Kilian/JRR/Sekulla, 1807.02512
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 14 New Physics in VBS: LHC & Lepton Colliders
Transversal (&mixed) operators:
Much more room for new physics
Braß/Fleper/Kilian/JRR/Sekulla, 1807.02512
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 14 New Physics in VBS: LHC & Lepton Colliders
Transversal (&mixed) operators:
Much more room for new physics
Braß/Fleper/Kilian/JRR/Sekulla, 1807.02512
Resonances might be in LHC direct reachEFT framework EW-restored regime: SU(2)L ⨉ SU(2)R , SU(2)L ⨉ U(1)Y gauged
Apply T-matrix unitarization beyond resonance (“UV-incomplete” model)
isoscalar isotensor
scalar �0���t ,��
t ,�0t ,�
+t ,�
++t
��v ,�
0v,�
+v
�0s
tensor f0
0
@X��
t , X�t , X0
t , X+t , X++
t
X�v , X0
v , X+v
X0s
1
A
. . . . . . . . .
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22Comparison: Simplified Models & EFTBlack dashed line: saturation of A22(W+W+)/A00(ZZ)
400 600 800 1000 1200 1400 1600 1800 2000M(ZZ)[GeV]
10�2
10�1
100
101
@�
@M
⇥fb
100G
eV
⇤
pp ! ZZjj
FS,1 = 12.3 TeV�4
F� = 4.0 TeV�1
SMlimit of A00
M� = 800GeV�� = 80GeV
400 600 800 1000 1200 1400 1600 1800 2000M(W+W+)[GeV]
10�2
10�1
100
101
@�
@M
⇥fb
100G
eV
⇤
pp ! W+W+jj
FS,0 = 19.2 TeV�4FS,1 = -134.1 TeV�4
FX = 38.6 TeV�1
SMlimit of A22
MX = 1800GeV�X = 720GeV
Kilian/Ohl/JRR/Sekulla: 1511.00022
15
Mjj > 500GeV; �⌘jj > 2.4; pjT > 20GeV; |�⌘j | < 4.5
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22Comparison: Simplified Models & EFT 15
Brass/Fleper/Kilian/JRR/Sekulla: 1807.02512
Mjj > 500GeV; �⌘jj > 2.4; pjT > 20GeV; |�⌘j | < 4.5
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22Comparison: Simplified Models & EFT 15
Fleper/Kilian/JRR/Sekulla: 1607.03030
1.0 TeV 1.4 TeV3.0 TeV
no pol.
CLIC (3 TeV)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22Comparison: Simplified Models & EFT 15
Unitarity limits for pp → VVVWIP: Brass/Kilian/JRR/Sekulla: 18XX.xxxxx
Fleper/Kilian/JRR/Sekulla: 1607.03030
1.0 TeV 1.4 TeV3.0 TeV
no pol.
CLIC (3 TeV)
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22
FKS subtraction [Frixione/Kunszt/Signer, hep-ph/9512328]
Resonance-aware treatment [Ježo/Nason, 1509.09071]
Virtual MEs external
Real and virtual subtraction terms internal
NLO decays available for the NLO processes
Fixed order events for plotting (weighted)
Automated POWHEG damping and matching
NLO QCD: final validation NLO EW started
New refactoring phase (3rd NLO refactoring)
16NLO Automation in WHIZARD
Working NLO interfaces to: ★ GoSam [N. Greiner, G. Heinrich, J. v. Soden-Fraunhofen et al.] ★ OpenLoops [F. Cascioli, J. Lindert, P. Maierhöfer, S. Pozzorini] ★ Recola [A. Denner, L. Hofer, J.-N. Lang, S. Uccirati]
NLO QCD (massless & massive) fully supported
alpha_power = 2 alphas_power = 0
process eett = e1,E1 => t, tbar { nlo_calculation = “full” }
List of validated NLO QCD processes• e
+e� ! jj
• e+e� ! jjj
• e+e� ! `
+`�jj
• e+e� ! `
+⌫`jj
• e+e� ! tt̄
• e+e� ! tt̄tt̄
• e+e� ! tt̄W
+jj
• e+e� ! tW
�b
• e+e� ! W
+W
�bb̄, `
+`�⌫`⌫̄`bb̄
• e+e� ! bb̄`
+`�
• e+e� ! tt̄H
• e+e� ! W
+W
�bb̄H, `
+`�⌫`⌫̄`bb̄H
• pp ! `+`�
• pp ! `⌫
• pp ! ZZ
• e+e� ! jj
• e+e� ! jjj
• e+e� ! `
+`�jj
• e+e� ! `
+⌫`jj
• e+e� ! tt̄
• e+e� ! tt̄tt̄
• e+e� ! tt̄W
+jj
• e+e� ! tW
�b
• e+e� ! W
+W
�bb̄, `
+`�⌫`⌫̄`bb̄
• e+e� ! bb̄`
+`�
• e+e� ! tt̄H
• e+e� ! W
+W
�bb̄H, `
+`�⌫`⌫̄`bb̄H
• pp ! `+`�
• pp ! `⌫
• pp ! ZZ
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 17
0.125 0.25 0.5 1.0 2.0 4.0 8.0µR/mt
0.95
0.975
1.0
1.025
�(µ
R)/
�(µ
R=
µ0)
WHIZARD+OPENLOOPS
NLO tt̄NLO W +W �bb̄, �t = �t(µR)NLO W +W �bb̄, �t = �t(mt)
e+e� ! tt̄ and e+e� ! W +W �bb̄ atp
s = 800 GeV
NLO QCD Results for off-shell e+e− → ttH
Chokoufé/Kilian/Lindert/Pozzorini/JRR/Weiss, 1609.03390
0.00
0.50
1.00
1.50
2.00
2.50
3.00
�[fb
]
WHIZARD+OPENLOOPS
LO tt̄HNLO tt̄HLO W +W �bb̄HNLO W +W �bb̄H
0.75
0.85
0.95
1.05
K-fa
ctor
500 1000 1500 2000 2500 3000ps [GeV]
0.90
1.05
1.20
1.35
�W
+W
�bb̄
H/�
tt̄H
425 500 575ps [GeV]
1.00
1.75
2.50
K-fa
ctor
e+e� ! tt̄H and e+e� ! W +W �bb̄H
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 17
0.125 0.25 0.5 1.0 2.0 4.0 8.0µR/mt
0.95
0.975
1.0
1.025
�(µ
R)/
�(µ
R=
µ0)
WHIZARD+OPENLOOPS
NLO tt̄NLO W +W �bb̄, �t = �t(µR)NLO W +W �bb̄, �t = �t(mt)
e+e� ! tt̄ and e+e� ! W +W �bb̄ atp
s = 800 GeV
NLO QCD Results for off-shell e+e− → ttH
0.125 0.25 0.5 1.0 2.0 4.0 8.0µR/(mt + mH)
0.9
0.95
1.0
1.05
�(µ
R)/
�(µ
R=
µ0)
WHIZARD+OPENLOOPS
NLO tt̄HNLO W +W �bb̄H, �t = �t(µR)NLO W +W �bb̄H, �t = �t(mt)
e+e� ! tt̄H and e+e� ! W +W �bb̄H atp
s = 800 GeV
Chokoufé/Kilian/Lindert/Pozzorini/JRR/Weiss, 1609.03390
0.00
0.50
1.00
1.50
2.00
2.50
3.00
�[fb
]
WHIZARD+OPENLOOPS
LO tt̄HNLO tt̄HLO W +W �bb̄HNLO W +W �bb̄H
0.75
0.85
0.95
1.05
K-fa
ctor
500 1000 1500 2000 2500 3000ps [GeV]
0.90
1.05
1.20
1.35
�W
+W
�bb̄
H/�
tt̄H
425 500 575ps [GeV]
1.00
1.75
2.50
K-fa
ctor
e+e� ! tt̄H and e+e� ! W +W �bb̄H
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 18Top Threshold/Continuum in WHIZARD
LC top threshold scan best-known method to measure top quark mass, ΔΜ ~ 30-70 MeV
LC continuum top production best-known method to measure top couplings
WHIZARD provides special model for top threshold
Matches threshold resummation with NLO QCD
Allows for (almost) fully exclusive final states
Chokoufé/Hoang/Kilian/JRR/Stahlhofen/Teubner/Weiss, 1712.02220 [JHEP 1803(2018)184]
Allows to study top mass dependence of differential distributions at threshold
0
100
200
300
400
500
600
700
800
900
1000
�[fb
]
matched, no switch-offNLLmatched, combined, symmetrizedNLO
330 340 350 360 370 380ps [GeV]
0.80
0.90
1.00
1.10
1.20
Unc
erta
inti
es
330 340 350 360 370 380ps [GeV]
0
100
200
300
400
500
600
700
800
900
1000
�[fb
]
matched, no switch-offNLLmatched, combined, symmetrizedNLO
Matched inclusive W +bW �b̄ cross section, no QED ISR
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 19Interface between WHIZARD — PYTHIA8
• Intention: directly communicate between event records of WHIZARD and PYTHIA8 • No intermediate files• Allows for using all the machinery for matching and merging from PYTHIA8
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 19Interface between WHIZARD — PYTHIA8
• Intention: directly communicate between event records of WHIZARD and PYTHIA8 • No intermediate files• Allows for using all the machinery for matching and merging from PYTHIA8
$shower_method = “PYTHIA8” $hadronization_method = “PYTHIA8”
Allows to use the PYTHIA8 toolbox for matching
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 20Gridpack functionality in WHIZARD
Implemented by Wolfgang Kilian [on sabbatical at CERN w. CLICdp 03/2018-08/2018]
Workspace subdirectory for GRID communication: job ID
Pack and unpack features: transfers whole directories, relies on tar
./whizard --job_id “42”
$grid_path = “<afs/…/…>”
[actually for the integration grids!]
./whizard -J “42”
or
./whizard script1_tar.sin --pack my_workspace
$compile_workspace = “my_workspace”script1_tar.sin contains
On the remote machine, you can run this with
./whizard script2_tar.sin --unpack my_workspace.tgz
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 21Outlook & Plans
WHIZARD 2.6.4 event generator for collider physics (ee, pp, ep)
High-multiplicity SM hard processes (2→10 etc.)
Allows to simulate all possible BSM models
Strong focus on e+e− physics: beam spectra, e+e− ISR, LCIO, polarizations
NLO QCD (almost) done ➝ WHIZARD 3.0 [EW validation started]
Multiboson physics: unitarization for transverse operators / resonances
NEW: UFO models: [WIP: still waiting for general Lorentz structures] MPI parallel integration Possibility to pre-set branching ratios for factorized processes Resonance matching to parton shower Fully integrated PYTHIA8 interface [not yet in official release] Batch mode / gridpack functionality MBI physics: transverse operators/resonances & unitarization
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 22Found on the Internet, available now:
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 22Found on the Internet, available now:
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 23
BACKUP
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 24Decay processes / auto decays
WHIZARD cannot only do scattering processes, but also decays
Example Energy distribution electron in muon decay:model = SM process mudec = e2 => e1, N1, n2 integrate (mudec)
histogram e_e1 (0, 60 MeV, 1 MeV) analysis = record e_e1 (eval E [e1])
n_events = 100000
simulate (mudec)
compile_analysis { $out_file = “test.dat” }
dN/dEe(µ� ! e�⌫̄e⌫µ)
GeV
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 24Decay processes / auto decays
WHIZARD cannot only do scattering processes, but also decays
Example Energy distribution electron in muon decay:model = SM process mudec = e2 => e1, N1, n2 integrate (mudec)
histogram e_e1 (0, 60 MeV, 1 MeV) analysis = record e_e1 (eval E [e1])
n_events = 100000
simulate (mudec)
compile_analysis { $out_file = “test.dat” }
auto_decays_multiplicity = 2 ?auto_decays_radiative = false
unstable Wp () { ?auto_decays = true }
Automatic integration of particle decays
dN/dEe(µ� ! e�⌫̄e⌫µ)
GeV
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 25WHIZARD: Past and recent timeline (I)
Original scope: electroweak (multi-fermion) studies at 1.6 TeV TESLA [≈ 1998–2000]
Milestone: first-ever multi-leg implementation of MSSM v1.25 [2003]
Color flow formalism [≈2005]
Used for many TESLA studies and most ILC CDR and TDR, CLIC CDR and detector LoI studies (versions v1.24, v1.50, v1.95) [≈ 2002–2013]
Major refactoring phase I: LHC physics ➝ v2.0.0 [≈ 2007–2010; 38 months]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 25WHIZARD: Past and recent timeline (I)
Original scope: electroweak (multi-fermion) studies at 1.6 TeV TESLA [≈ 1998–2000]
Milestone: first-ever multi-leg implementation of MSSM v1.25 [2003]
Color flow formalism [≈2005]
Used for many TESLA studies and most ILC CDR and TDR, CLIC CDR and detector LoI studies (versions v1.24, v1.50, v1.95) [≈ 2002–2013]
Major refactoring phase I: LHC physics ➝ v2.0.0 [≈ 2007–2010; 38 months]
Eyjafjallajökull
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 25WHIZARD: Past and recent timeline (I)
Original scope: electroweak (multi-fermion) studies at 1.6 TeV TESLA [≈ 1998–2000]
Milestone: first-ever multi-leg implementation of MSSM v1.25 [2003]
Color flow formalism [≈2005]
Used for many TESLA studies and most ILC CDR and TDR, CLIC CDR and detector LoI studies (versions v1.24, v1.50, v1.95) [≈ 2002–2013]
Major refactoring phase I: LHC physics ➝ v2.0.0 [≈ 2007–2010; 38 months]
Validation inside ATLAS and CMS [≈2011–2014]
Refactoring phase II: NLO automation / maintainability ➝ v2.2.0
[≈ 2012–2014; 18 months]
Strong interest of CEPC study group(s) for CEPC simulations [≈ 2013 — now]
04/2015, ALCW’15 Tokyo: LC generator group endorsed v2.2 for new mass productions
FCC-ee interest in simulations: [ca. spring 2016]
Refactoring phase III: first NLO implementation overhaul [2016; 3 months]
Eyjafjallajökull
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 26WHIZARD: Past and recent timeline (II)
Final validation for LC [ee] physics between v1.95 and v2 [until end of 2017]
Special thanks to: [beam spectra, photon background, event formats, shower/hadronization, tau decays]
Mikael Berggren Jean-Jacques Blaising Moritz Habermehl Mo Xin Akiya Miyamoto Tim Barklow Philipp Roloff
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 26WHIZARD: Past and recent timeline (II)
Final validation for LC [ee] physics between v1.95 and v2 [until end of 2017]
Special thanks to: [beam spectra, photon background, event formats, shower/hadronization, tau decays]
Mikael Berggren Jean-Jacques Blaising Moritz Habermehl Mo Xin Akiya Miyamoto Tim Barklow Philipp Roloff
01/2018, CERN, LC generator meeting: only trivial minor, ready for mass production
Refactoring phase IV: core data structure overhaul: NLO [fall 2018; ca. 2-3months]
[dust-layer buried students, total-code-no-man-wasteland alarm]
Preparation phase for WHIZARD 3.0.0 started: … PARALLEL TO ….
Work on: [NLO QCD final validation; structure functions; NLO EW; shower and matching/merging]
(Technical) refactoring phase V: code modernization (submodules etc: gfortran 6.1+ )
[end of 2018 / early 2019; when NAG debugging compiler support ready]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 27Beam structure: special beams Beam polarization, ILC-like setup
beams = e1, E1 beams_pol_density = @(-1), @(+1) beams_pol_fraction = 80%, 30%
Polarized decays: longitudinal Z
process zee = Z => e1, E1 beams = Z beams_pol_density = @(0)
Scan over polarizations
scan int h1 = (-1,1) { scan int h2 = (-1,1) { beams_pol_density = @(h1), @(h2) integrate (proc) } }
Asymmetric beams
beams = e1, E1 beams_momentum = 100 GeV, 900 GeV
Beams with crossing angle
Beams with rotated crossing angle
beams_momentum = 250 GeV, 250 GeV beams_theta = 0, 10 degree
beams_momentum = 250 GeV, 250 GeV beams_theta = 0, 10 degree beams_phi = 0, 45 degree
Structure functions (also concatenated)
beams = p, p => pdf_builtin $pdf_builtin_set = “mmht2014lo”
beams = p, pbar => lhapdf
beams = e, p => none, pdf_builtin
beams = e1, E1 => circe1 $circe1_acc = “TESLA” ?circe1_generate = false circe1_mapping_slope = 2
beams = e1, E1 => beam_events $beam_events_file = “uniform_spread_2.5%.dat”
beams = e1, E1 => circe2 => isr => ewa
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 28Beam structure: beam polarization Beam polarization
beams_pol_density = @([<spin entries>]), @([<spin entries>]) beams_pol_fraction = <degree beam 1>, <degree beam 2>
Different density matrices
Spin j Particle type possible m values0 Scalar boson 01/2 Spinor +1, -11 (Massive) Vector boson +1, (0), -13/2 (Massive) Vectorspinor +2, (+1), (-1), -22 (Massive) Tensor +2, (+1), (0), (-1), -2
beams_pol_density = @() Unpolarized beams ⇢ =1
|m| I
beams_pol_density = @(±j) beams_pol_fraction = f Circular polarization ⇢ = diag
✓1± f
2, 0 , . . . , 0 ,
1⌥ f
2
◆
beams_pol_density = @(0) beams_pol_fraction = f
Longitudinal polarization (massive)
⇢ = diag
✓1� f
|m| , . . . ,1� f
|m| ,1 + f (|m|� 1)
|m| ,1� f
|m| , . . . ,1� f
|m|
◆
|m| = 2j + 1 massive
massless|m| = 2
beams_pol_density = @(j, -j, j:-j:exp(-I*phi)) beams_pol_fraction = f
Transversal polarization(along an axis) ⇢ =
0
BBBBBBB@
1 0 · · · · · · f2 e�i�
0 0. . . 0
.... . .
. . .. . .
...
0. . . 0 0
f2 ei� · · · · · · 0 1
1
CCCCCCCA
beams_pol_density = @(j:j:1-cos(theta), j:-j:sin(theta)*exp(-I*phi), -j:-j:1+cos(theta)) beams_pol_fraction = f
Polarization along arbitrary axis (θ,Φ)⇢ =
1
2·
0
BBBBBBB@
1� f cos ✓ 0 · · · · · · f sin ✓ e�i�
0 0. . . 0
.... . .
. . .. . .
...
0. . . 0 0
f sin ✓ ei� · · · · · · 0 1 + f cos ✓
1
CCCCCCCAbeams_pol_density = @(j:j:hj, j-1:j-1:hj−1, …, -j:-j:h−j)
beams_pol_density = @({m:m′:xm,m′}) Diagonal / arbitrary density matrices
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 29Resonance mappings for NLO processes
Amplitudes (except for pure QCD/QED) contain resonances (Z, W, H, t) In general: resonance masses not respected by modified kinematics of subtraction terms Collinear (and soft) radiation can lead to mismatch between Born and subtraction terms
Algorithm to include resonance histories [Ježo/Nason, 1509.09071]
Avoids double logarithms in the resonances’ width Most important for narrow resonances (H ➝ bb) Separate treatment of Born and real terms, soft mismatch [, collinear mismatch]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 29Resonance mappings for NLO processes
Amplitudes (except for pure QCD/QED) contain resonances (Z, W, H, t) In general: resonance masses not respected by modified kinematics of subtraction terms Collinear (and soft) radiation can lead to mismatch between Born and subtraction terms
Algorithm to include resonance histories [Ježo/Nason, 1509.09071]
Avoids double logarithms in the resonances’ width Most important for narrow resonances (H ➝ bb) Separate treatment of Born and real terms, soft mismatch [, collinear mismatch]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 29Resonance mappings for NLO processes
Amplitudes (except for pure QCD/QED) contain resonances (Z, W, H, t) In general: resonance masses not respected by modified kinematics of subtraction terms Collinear (and soft) radiation can lead to mismatch between Born and subtraction terms
WHIZARD complete automatic implementation: example e+ e− ➝ μμbb (ZZ, ZH histories)
standard FKS
Algorithm to include resonance histories [Ježo/Nason, 1509.09071]
Avoids double logarithms in the resonances’ width Most important for narrow resonances (H ➝ bb) Separate treatment of Born and real terms, soft mismatch [, collinear mismatch]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 29Resonance mappings for NLO processes
Amplitudes (except for pure QCD/QED) contain resonances (Z, W, H, t) In general: resonance masses not respected by modified kinematics of subtraction terms Collinear (and soft) radiation can lead to mismatch between Born and subtraction terms
WHIZARD complete automatic implementation: example e+ e− ➝ μμbb (ZZ, ZH histories)
standard FKS FKS with resonance mappings
Algorithm to include resonance histories [Ježo/Nason, 1509.09071]
Avoids double logarithms in the resonances’ width Most important for narrow resonances (H ➝ bb) Separate treatment of Born and real terms, soft mismatch [, collinear mismatch]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 30Event FormatsEvent formats: conventions for outputting details of the events
sample_format = hepmc sample_format = lhef {$lhef_version = “3.0”} sample_format = stdhep, stdhep_up, stdhep_ev4 sample_format = ascii,debug,mokka,lha sample_format = lcio simulate (<process>)
• External format, ASCII: HepMC [Dobbs/Hansen, 2001]
• External format, binary: LCIO [Gaede, 2003]
• Internal formats, binary: StdHEP [Lebrun, 1990]
• Internal formats, ASCII: LHA, LHEF [Alwall et al. , 2006]
J.R.Reuter Status of WHIZARD MBI 2018, U. of Michigan, Ann Arbor, 28.08.18
/ 22 30Event FormatsEvent formats: conventions for outputting details of the events
sample_format = hepmc sample_format = lhef {$lhef_version = “3.0”} sample_format = stdhep, stdhep_up, stdhep_ev4 sample_format = ascii,debug,mokka,lha sample_format = lcio simulate (<process>)
• External format, ASCII: HepMC [Dobbs/Hansen, 2001]
• External format, binary: LCIO [Gaede, 2003]
• Internal formats, binary: StdHEP [Lebrun, 1990]
• Internal formats, ASCII: LHA, LHEF [Alwall et al. , 2006]
LCIO Format (LC I/O; particle-flow motivated): (ASCII transcription of binary)============================================================================ Event : 1 - run: 0 - timestamp [...] ============================================================================ date: [...] detector : unknown event parameters: parameter Event Number [int]: 1, parameter ProcessID [int]: 1, parameter Run ID [int]: 0, parameter beamPDG0 [int]: 11, parameter beamPDG1 [int]: -11, parameter Energy [float]: 500, parameter Pol0 [float]: 0, parameter Pol1 [float]: 0, parameter _weight [float]: 1, parameter alphaQCD [float]: 0.1178, parameter crossSection [float]: 338.482, parameter crossSectionError [float]: 7.2328, parameter scale [float]: 500, parameter BeamSpectrum [string]: , parameter processName [string]: lcio_5_p, collection name : MCParticle parameters: --------------- print out of MCParticle collection --------------- flag: 0x0 simulator status bits: [sbvtcls] s: created in simulation b: backscatter v: vertex is not endpoint of parent t: decayed in tracker c: decayed in calorimeter l: has left detector s: stopped o: overlay [ id ]index| PDG | px, py, pz | energy |gen|[simstat]| vertex x,y,z | mass | charge | spin | colorflow | [par] - [dau] [00000004] 0| 11| 0.00e+00, 0.00e+00, 2.50e+02| 2.50e+02| 3 |[ 0 ]| 0.0, 0.0, 0.0| 5.11e-04|-1.00e+00| 0.0, 0.0, 0.0| (0, 0) | [] - [2,3] [00000005] 1| -11| 0.00e+00, 0.00e+00,-2.50e+02| 2.50e+02| 3 |[ 0 ]| 0.0, 0.0, 0.0| 5.11e-04| 1.00e+00| 0.0, 0.0, 0.0| (0, 0) | [] - [2,3] [00000006] 2| 13| 1.42e+02, 1.99e+02,-5.22e+01| 2.50e+02| 1 |[ 0 ]| 0.0, 0.0, 0.0| 1.06e-01|-1.00e+00| 0.0, 0.0, 1.0| (0, 0) | [0,1] - [] [00000007] 3| -13|-1.42e+02,-1.99e+02, 5.22e+01| 2.50e+02| 1 |[ 0 ]| 0.0, 0.0, 0.0| 1.06e-01| 1.00e+00| 0.0, 0.0,-1.0| (0, 0) | [0,1] - []
LCIO Format (LC I/O, particle-flow motivated): (ASCII transcription from binary)
Event header information as agreed upon with LC Gen Group