A conceptual design of the single stage multi-TeV electron-positron pair beam collider
Physics at a 100 TeV Collider
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Transcript of Physics at a 100 TeV Collider
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Physics at a 100 TeV Collider
Qi-Shu Yan (UCAS/CHEP,PKU)
Q.S.Yan(UCAS/CHEP) MC4BSM-2014, Daejeon, May 18-23
On behalf of MC working group for CEPCMonte Carlo Tools for Physics Beyond the Standard Model
18-23/May 2014, Deajeon,South Korea
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MC4BSM-2014, Daejeon, May 18-23 2
Plan of this talk
• 1) Introduction to a 100 TeV collider• 2) Physics in a 100 TeV Collider• 3) On-going MC works for a 100 TeV Collider– 3.1) Quartic gauge coupling– 3.2) B’ search with Top and W taggers– 3.3) Higgs triple coupling [a Higgspair toolkit]
• 4) Conclusions
Q.S.Yan(UCAS/CHEP)
CEPC: Circular Electron-Positron Collider, Super-Proton-proton Collider
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MC4BSM-2014, Daejeon, May 18-23 3
Sources https://twiki.cern.ch/twiki/bin/view/LHCPhysics/FutureHadroncollider http://indico.cern.ch/categoryDisplay.py?categId=525• Sources: Snowmass reports• International Workshop on Future High Energy Circular Colliders http://indico.ihep.ac.cn/conferenceOtherViews.py?view=standard&confId=3813
• FCC Study kickoff meetings (Feb. 12-15,2014,CERN) https://indico.cern.ch/event/282344/
• BSM Physics opportunities at 100TeV (Feb. 10-11,2014,CERN) http://indico.cern.ch/event/284800/
• CFHEP Kickoff Meeting (Feb. 23-24, 2014, IHEP, Beijing) http://indico.ihep.ac.cn/conferenceDisplay.py?confId=4068
• Physics at a 100 TeV collision (SLAC) https://indico.fnal.gov/conferenceDisplay.py?confId=7633
Q.S.Yan(UCAS/CHEP)
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MC4BSM-2014, Daejeon, May 18-23 4Q.S.Yan(UCAS/CHEP)
1) Introduction
What is our future?
Just before the restartingof LHC runII in 2015, please think
about it.
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MC4BSM-2014, Daejeon, May 18-23 5Q.S.Yan(UCAS/CHEP)
Adv. In luminosity at Higgs production rate and upgradeability for a pp collider,Circular Collider plans have been revitalized.
1308.6176, TLEP
1) Introduction
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MC4BSM-2014, Daejeon, May 18-23 6Q.S.Yan(UCAS/CHEP)
CERN base
SLACbase
CHEP base
When? Time scale?
7/10/30 years?
Where?
A synergy of global efforts of high energy community is dispensable.
Grow individual plans in a parallel way
1) IntroductionHow to make the dream come true?
A real 100 TeVcollider
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MC4BSM-2014, Daejeon, May 18-23 7Q.S.Yan(UCAS/CHEP)
Plan of Beijing base: CEPC
“Great Ring”, quoted from D. Gross
1) Introduction240 GeV
100 TeV
From Y.F. Wang’s talk
We are not supposed to do something easy.
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MC4BSM-2014, Daejeon, May 18-23 8Q.S.Yan(UCAS/CHEP)
One of potential sites in CEPC plan
The starting point of the Great Wall
1) Introduction
2 hours of flight between Seoul-Beijing
150 km
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MC4BSM-2014, Daejeon, May 18-23 9Q.S.Yan(UCAS/CHEP)
From XinChou Lou’s talk
CFHEP, CAS is established to conduct the plan. The center may go into a new international Lab after 2015.~3,000 particle physicists
1) Introduction
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MC4BSM-2014, Daejeon, May 18-23 10Q.S.Yan(UCAS/CHEP)
to strengthen collaborations between th. and exp. working groups and to form a strong and competitive
regional high energy community
1) Introduction
8 Subgroups
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MC4BSM-2014, Daejeon, May 18-23 11Q.S.Yan(UCAS/CHEP)
MC working group shall develop necessary MC tools and perform feasibility studies and provide important inputs for Detector Specifics and train workforce as well.
1) Introduction
We are matching forward!
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MC4BSM-2014, Daejeon, May 18-23 12Q.S.Yan(UCAS/CHEP)
Top factories, Higgs Factories, new mass range …
Snowmass QCD 1310.5180
2) Physics in a 100 TeV collider
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MC4BSM-2014, Daejeon, May 18-23 13Q.S.Yan(UCAS/CHEP)
From M. L. Mangano’s talk 2) Physics in a 100 TeV collider
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MC4BSM-2014, Daejeon, May 18-23 14Q.S.Yan(UCAS/CHEP)
From M.L. Mangano’s talk on 16/Dec/2013, Beijing
Detectors with good energy measurement and spatial resolution are needed.
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MC4BSM-2014, Daejeon, May 18-23 15Q.S.Yan(UCAS/CHEP)
From Rojo’s talk
t t scattering is possible at a 100 TeV collider in RS and composite models
2) Physics in a 100 TeV collider
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MC4BSM-2014, Daejeon, May 18-23 16Q.S.Yan(UCAS/CHEP)
2) Physics in a 100 TeV collider
Jesper’s talk
Electroweak Shower
From M.L. Mangano’s talk on 16/Dec/2013, Beijing
& 1401.5238Collimated Weak Bosons
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MC4BSM-2014, Daejeon, May 18-23 17Q.S.Yan(UCAS/CHEP)
Snowmass:1311.0299
Andrea Wulzer’s talk
See Andreas Weiler’s talk
2) Physics in a 100 TeV collider
!00 TeV collider is discovery machineNew physics can be in a form of new Particles. Let’s find them by collisions.
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MC4BSM-2014, Daejeon, May 18-23 18Q.S.Yan(UCAS/CHEP)
The reach of excited Quarks,Jake Anderson’ talk
Tom Rizzo, 1403.5465
2) Physics in a 100 TeV collider
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MC4BSM-2014, Daejeon, May 18-23 19Q.S.Yan(UCAS/CHEP)
Snowmass 1311.0299
Andreas Weiler’s talk
New mass range 2) Physics in a 100 TeV collider
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MC4BSM-2014, Daejeon, May 18-23 20Q.S.Yan(UCAS/CHEP)
Simplified SUSY model, Snowmass:1311.0299
2) Physics in a 100 TeV collider
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Triple Gauge Couplings Quartic Gauge Couplings
3.1) (a)Quartic gauge coupling
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NonAbelian triple Gauge structure has been tested and confirmed!
3.1) (a)Quartic gauge coupling
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LHC is a good place to test (a)QGC of NonAbelian structure of SU(2)xU(1)and new physics!
3.1) (a)Quartic gauge coupling
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Feasibility study@LHC for (a)QGC via tri-lepton channelPileup mitigates the significance to a certain degree.
H. Qu, Y. Wen, D. Yang, QY, Q. Li, Y. Mao
S1 means only mZ with cut, S2 means same sign same flavor
3.1) Quartic gauge coupling
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lv+4j @8TeV LHC 20fb-1cut method no PileUp, 0.099 sigma, PileUp 20, 0.085 sigma,BDT no PileUp, 0.14sigma, PileUp 20, 0.11sigma
lv+l'v+2j (OS OF) @8TeV LHC 20fb-1cut method no PileUp, 0.21 sigma, PileUp 20, 0.16 sigma,BDT no PileUp, 0.26sigma, PileUp 20, 0.20sigma
llvv+2J (SS) @8TeV LHC 20fb-1cut method no PileUp, 0.81 sigma, PileUp 20, 0.69 sigma,BDT no PileUp, 0.90sigma, PileUp 20, 0.79sigma
llvv+2J (SS) @14TeV LHC 100fb-1 cut method no PileUp, 1.55 sigma, PileUp 20, 1.12 sigma,BDT no PileUp, 1.76sigma, PileUp 20, 1.51sigma
3.1) Quartic gauge coupling
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MC4BSM-2014, Daejeon, May 18-23 26Q.S.Yan(UCAS/CHEP)
H. Qu, Y. Wen, D. Yang, QY, Q. Li, Y. Mao
3.1) Quartic gauge coupling
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MC4BSM-2014, Daejeon, May 18-23 27Q.S.Yan(UCAS/CHEP)
Simone, Matsedonskyi,Rattazzi,Wulzer, 1211.5663A first Top partner Hunter’s Guide
Andrea Wulzer’s talk
3.2) B’ search
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Fully Hadronic channel is usually challenging due to huge SM background and high combinatorics
Taggers for boosted object could play a role to distinguish signal and background if b’ is heavy.
3.2) B’ search
Matteo Cacciaro’s talk on jet, Brock Tweedie’s talk on Jetsubstructure,Joe Juknevich’s for a top tagger
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B’ signal search @LHC 14TeV with HEPtop and W taggersS. Yang, J. Jiang, QY, X. Zhao, 1405.2514
3.2) B’ search
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B’ signal search @LHC 14TeV with top and w taggersS. Yang, J. Jiang, QY, X. Zhao, 1405.2514
2 TeV b’might bereachable.
3.2) B’ search
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7-8 TeV b’might bereachablefor 100 TeVwith fully hadronicMode
Work ongoing
3.2) B’ search
From M.L. Mangano’s talk on 16/Dec/2013, Beijing
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MC4BSM-2014, Daejeon, May 18-23 32Q.S.Yan(UCAS/CHEP)
Further analysis is ongoing. Single production signal, Pileup mitigation, top and W taggers at high Pt region, granularity of detectors as a benchmark for detector
specifics,…
The fully hadronic mode SS modes, …SS modes, …
3.2) B’ search
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33
Proc. 14 TeV R(33) R(40) R(60) R(80) R(100)
tttt 5.3 fb 18.1 32.1 97.7 199.9 345.3
ttww 8.6 fb 9.1 14.2 35.3 64 102
Q.S.Yan(UCAS/CHEP) MC4BSM-2014, Daejeon, May 18-23
Background events not important at 14 TeV are significant at 100 TeVS. Yang, J. Jiang, QY, X. Zhao, works ongoing
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3.3) Higgs triple coupling
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Nice theoretical worksJ. Baglio, et.al. 1212.5581
D.Y. Shao, C.S. Li, H.T. Li, J. Wang, 1301.1245
3.3) Higgs triple coupling
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MC4BSM-2014, Daejeon, May 18-23 36Q.S.Yan(UCAS/CHEP)
Florian, Mazzitelli, 1309.6594
Ling, et.al., 1401.7754 (USTC, HeiFei)
3.3) Higgs triple coupling
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The first fully exclusive accurate prediction for Higgs pair production plus one jetwith MLM matching
Q. Li, QY, X. Zhao, 1312.3830, P.Maierhofer, A. papaefstathiou 1401.0007,
R. Frederix. S. Frixione. F. Maltoni, O. Mattelaer, P. Torrielli, E. Vryonidou, M. Zaro, 1401.7340
A Higgpair toolkit for multiHiggs production starts to work
3.3) Higgs triple coupling
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38Q.S.Yan(UCAS/CHEP) MC4BSM-2014, Daejeon, May 18-23
3.3) Higgs triple coupling
Comparison of aMC and GosamQ. Li, QY, Z. Zhao, X. Zhao, Extensions to new Higgs, ongoing
See Marco’s talk for aMC, Nicolas’s talk for Gosam
Higgspair toolkit future plan: UFO for BSM, NNLO(MEPS@NLO), …
Silvan’s talk for SherpaClaude’s talk for FeyRules
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Higgs pair signal search @LHC 14TeV, ongoing works Q. Li, QY, Z. Zhao, X. Zhao
3.3) Higgs triple coupling
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ttW 0.5 pb 3.7 4.9 8.4 12.1 15
ZW[dc] 12 pb 3.0 3.8 6.1 8.7 11.1
A gain in significance for HH is obvious!
More detailed analysis extended for 100 TeV is ongoingPileup contamination/Jet pruning, lepton tagging efficiency, etc….
From M.L. Mangano’s talk, 16/Dec/2013, Beijing
3.3) Higgs triple coupling
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MC4BSM-2014, Daejeon, May 18-23 41
4. Conclusions• “The great ring” offers us great opportunities
for precision measurement and discovery of new physics
• Room for your contributions, ideas, … • New opportunities for MC development: high
precision (NLO/NNLO), discoveries of DM, computing technology, Higgs factory…
Q.S.Yan(UCAS/CHEP)
Soo-hyeon Nam’s talk for HTCaaS
Mihailo’s talk for madDMK.C. Kong, Zhenyu Han,D. Kim’s talk
Wolfgang’s talk for WhizardJamie’s talk for CheckMate
J.Lee’s talk for CPsuperH
Stephen’s talk for Pythia
David’s talk for HerwigBenjamin’s talk for Madanalysis
Kazaki’s talk for Atom
Alexander’s CalcHep