on behalf of the GAMBIT collaboration · Direct detection has far more of an impact from a Bayesian...
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An Update on GAMBIT Sanjay Bloor, on behalf of the GAMBIT collaboration DMUK 2019
Transcript of on behalf of the GAMBIT collaboration · Direct detection has far more of an impact from a Bayesian...
An Update on GAMBIT
Sanjay Bloor,on behalf of the GAMBIT collaboration
DMUK 2019
Outline
● Global fits & GAMBIT● Recent Dark Matter results:
– Higgs portal– Electroweak SUSY– Axion-like particles
● Future developments
Outline
● Global fits & GAMBIT● Recent Dark Matter results:
– Higgs portal– Electroweak SUSY– Axion-like particles
● Future developments
Global Fits● Many theories for physics beyond the SM…● Each theory has different phenomenology● How to assess which BSM theory is preferred?
→ Compare to data!
→ Perform a statistical fit to all available data: a global fit● For multiple parameters and constraints, create a combined likelihood
● Explore the likelihood across the whole space● Interpret the results in a statistically meaningful way:
→ Profile/marginalise down to 1 or 2 dimensions
Maximum reuse of code, flexibility, modularity: GAMBIT.
Modules
Core – models, bookkeeping
DarkBit – relic density, direct + indirect detection
ColliderBit – collider, higgs observables
FlavBit – flavour physics
SpecBit – spectrum objects, RGE running
DecayBit – decay widths
PrecisionBit – precision BSM tests
ScannerBit – stats, sampling and optimisation
(EPJC, arXiv:1705.07908)
(EPJC, arXiv:1705.07920)
(EPJC, arXiv:1705.07919)
(EPJC, arXiv:1705.07933)
(EPJC, arXiv:1705.07936)
(EPJC, arXiv:1705.07959)
}
Modules
Core – models, bookkeeping
DarkBit – relic density, direct + indirect detection
ColliderBit – collider, higgs observables
FlavBit – flavour physics
SpecBit – spectrum objects, RGE running
DecayBit – decay widths
PrecisionBit – precision BSM tests
ScannerBit – stats, sampling and optimisation
(EPJC, arXiv:1705.07908)
(EPJC, arXiv:1705.07920)
(EPJC, arXiv:1705.07919)
(EPJC, arXiv:1705.07933)
(EPJC, arXiv:1705.07936)
(EPJC, arXiv:1705.07959)
}
DarkBit: WIMPs
Models:SUSY, Higgs portals...
DM nucleon couplings
‘Process Catalog’
*Relativistic DM nucleon
effective operators
Effective Annihilation
RateYields
Direct detection
rates
Indirect detection
rates
*coming soon! (EPJC, arXiv:1705.07920)
Outline
● Global fits & GAMBIT● Recent Dark Matter results:
– Higgs portal– Electroweak SUSY– Axion-like particles
● Future developments
Vector Higgs portal DM
● 7 Standard Model, nuclear and astrophysical nuisance parameters
● Perturbative unitarity bound:
● Only resonance region and high-mass region remain
Vector Higgs portal DM
● Standard spin-independent cross-section● Observables rescaled by the theoretical relic abundance● Next generation direct detection experiments can probe almost all of the mass range for
vector DM
Vector Higgs portal DM
● ‘Neck’ region disappears when integrating over additional parameters● Resonance region falls out of 2σ credible region in a Bayesian interpretation
Fermion Higgs portal DM
● Portal is a mixture of CP-even and CP-odd terms● EFT validity requirement
● CP-odd coupling induces momentum suppressed spin-independent cross-section● Resonance and high-mass solutions joined by solutions with
Fermion Higgs portal DM
● Pseudoscalar coupling induces momentum suppressed spin-independent cross-section:
● To evade sensitive direct detection constraints,
Fermionic Higgs portal
● Direct detection has far more of an impact from a Bayesian perspective!● Integrating over additional parameters highlights fine-tuning of ξ above
Electroweak MSSM
● Combined analysis of ATLAS + CMS electroweakino searches
● Local significance of 3.3σ above SM only background
● Mostly bino LSP
(EPJC, arXiv:1809.02097)
Electroweak MSSM
● Post-processing only! – Scan did not target DM likelihoods, no DM nuisance parameters
● Collider data prefers light Electroweakinos, μ not decoupled, non-zero Higgsino component, neutralino couples to Z and H
● Z- and Higgs funnels can give the correct relic density!
Axion-like particles (ALPs)
● QCD axions, DFSZ-like, KSVZ-like models, ALPs● Frequentist and Bayesian analyses● Bayesian analysis prefers a mass window of ~0.1μeV-10meV for QCD axions
(JHEP, arXiv:1810.07192)
Outline
● Global fits & GAMBIT● Recent Dark Matter results:
– Higgs portal– Electroweak SUSY– Axion-like particles
● Future developments
GUM
● GUM (GAMBIT Universal Models)● Interfaces GAMBIT to symbolic Lagrangian level tools● Automatically writes source code for:
– Model hierarchy entry
– Decay widths– Spectrum object– “Process Catalog” for DM
– Collider interface
– and more!
● Coming soon!
GUM
Red = complete
CosmoBit
● Cosmology module for BSM physics!● New observables and likelihoods including:
● BBN● CMB● BAO● SNe●
● Coming soon!
Summary● Higgs portal models are getting well constrained –
although momentum suppression can make things tricky● EW scale SUSY is not dead● Axions are getting interesting, but are probably not all of
the DM
● Interface to Lagrangian level tools & expansion into cosmology coming very soon!
All results, samples, etc. available to download on Zenodo GAMBIT code is public: gambit.hepforge.org
