higgs and electroweak physics · dark matter connections – higgs and/or ew bosons portals...

Alexander Belyaev 1

“Higgs and Electroweak Physics”

Higgs and Electroweak Physics[theory summary]

Alexander Belyaev

Southampton University & Rutherford Appleton LAB

WIN2015

June 12, 2015, MPIK Heidelberg

Alexander Belyaev 2


Present: impressive success of LHC RUN 1 on the Higgs&EW Physics measurements!

Alexander Belyaev 3


Karl Jakobs' talk

Alexander Belyaev 4


Present: no deviations from SM ...

Alexander Belyaev 5


Higgs Boson Discovery has completed the puzzle of the Standard model ...

Alexander Belyaev 6


But it has raised even more questionsthan the number of answers it has given!

Alexander Belyaev 7



The Nature of Higgs Boson?

Alexander Belyaev 8




Fine-tuningproblem

Alexander Belyaev 9




Fine-tuningproblem

Dark Matterproblem

Alexander Belyaev 10




Fine-tuningproblem

Dark Matterproblem

Connection to GUT & couplings

unification





Fine-tuningproblem

Dark Matterproblem

The origin ofmatter/anti-matter

asymmetry


unification




Fine-tuningproblem

Dark Matterproblem

The origin ofmatter/anti-matter

asymmetry


unification

Higgs boson properties are consistent with main compelling BSM theories, so the pattern we have is just a piece of a much bigger puzzle!



Beyond the Higgs discovery Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!)Some parameter space of BSM theories was eventually excluded.

CPNSH workshopCERN 2006-009



Beyond the Higgs discovery Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!)Some parameter space of BSM theories was eventually excluded.

PresentStatus



Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!)Some parameter space of BSM theories was eventually excluded.

fundamental scalar

“regular” Higgs Goldstone boson

TechnicolourSUSY

Models with Higgs boson

UED ADD Twin Higgs

Little Higgs RS

composite scalar

RS CHM

Beyond the Higgs discovery



What do we know about BSM?



What do we know about BSM?It does exist!





And Higgs & EW sector is the perfect (may be the best) place to probe it! [see also Alex Pomarol's talk]




Higgs production cross sections, coupling determination, model-independent analysis (higher-dimensional operators)Higgs widthNew Higgs DecaysLongitudinal Vector Boson scattering (VLVL ), unitarity considerations, new vector and scalar resonancesNew states decaying into Higgs – SUSY, TC, CHMDark Matter Connections – Higgs and/or EW bosons portalsConnection to inflationNeutrino PhysicsFlavour Physics ..........

And Higgs & EW sector is the perfect (may be the best) place to probe it! [see also Alex Pomarol's talk]



Higgs&EW group at WIN201523 talks, great TH<->EXP dialog, new results!



Higgs Couplings measurements/analysis



EWPTs and Higgs+TGCconstraints on dim-6 operators

Tevong You Juan González Fraile



The role of the change of kinematics

Tevong You

Some operators affect not only the Higgs signal rate but also differential distributions. Taking it into account could significantly increase sensitivity to a new physics!

Juan González Fraile

cW fW



EWPTs and Higgs+TGC constraints on dim-6 operators taking into account kinematics

Tevong You

for ci=1 LHC probes ~ 0.5–5 TeV scale range of Λ with Higgs+TGC couplings Taking it into account kinematics does increase sensitivity!

Juan González Fraile



Indirect constraints on stopsand validity of EFT

Tevong You

below 500 GeV, the EFT breaks down; above 500 GeV EFT provides description with the accuracy better than 10%

Drozd, Ellis,Quevillon,You'15



Vector Boson Fusion (VBF) and multi-boson Production



VBF sensitivity to Higgs and new physicsMarc Thomas

VBF is more model-independent

VS





VS

VBF is sensitive to the lack of cancellation in VLVL scattering amplitude

a x hVV

SM





VS


a x hVV

SM

for ghVV deviation from SMthe cross section faster increases with energy for larger numbers of final state particles



VBF at proton-proton levelMarc Thomas

WLWL->WLWL enhancement is hidden under the large transverse “polution” WW->hhh enhancement is impressive, but rates are too low for the LHCTo measure ghVV from WLWL->WLWL one needs suppress WT contribution



Results on the VBF sensitivityMarc Thomas

cuts reduce transversely polarised background and make measurement of HVV coupling from VBF viable,providing model-independent way of measuring of HVV coupling



Connection to Composite Higgs and Technicolor models



Is Technicolor really dead?Mads Frandsen



Is Technicolor really dead?Mads FrandsenIf title contains question, then the answer is ...

NO!



Mads Frandsen



TC Higgs

Higgs as Techni-scalar can be dynamicall light !

Frandsen, Sannino, Foadi (2012)κ



TC Higgs vs data

Belyaev, Brown,Foadi,Frandsen (2012)



TC Phenomenology

Belyaev,Frandsen,Foadi,Jarvinen, Sannino 2008Hapola, Sannino 11

●Resonances couples to TC Higgs●Resonances couples to W,Z●The search for di-boson signatures is important!●Setting limits on the TC scale willstrongly constrain the lowerlimit on TC-Higgs mass



Higgs in SUSY models



SUSY reinterpretation of LHC Higgs results Sven Heinemeyer



Fully Covering the MSSM Higgs Sector at the LHC Jeremie Quevillon

Higgs sector is defined effectively at tree-level by tan(β) and MA!

Higgs mass should be used as input!




Note: decays to SUSY particles are absent here!



Chances for SUSY-GUT in the LHC EpochMarco Chianese

SU(5) framework



Chances for SUSY-GUT in the LHC Epoch

Marco Chianese

The limit is based – on naturalness of λ principles!



NMSSM Higgs signatures from stop decays Dilip Ghosh



NMSSM Higgs signatures from stop decays Dilip Ghosh

Higgs-jet ID efficiency can be high in the high-PT Higgs region, so Higgs-jet can be generically used for BSM hunting!



Higgs connection to Cosmoogy:Dark Matter, Baryogenesis and Inflation



Higgs-Dark Matter Connectionand the Scale of New Physics

Michael Scherer



Minimal SU(N) VectorDark Matter

Stefano Di Chiara



Stefano Di Chiara

H1/H2 mixing



The model can be probed and potentially completely excluded at the LHC@13 TeV !

Matthias Mozer

Stefano Di Chiara

mailto:LHC@13



THE SM VACUUM AND HIGGS INFLATIONJavier Rubio

Interaction with gravity introduc Higher dimensional operatorsWhich change running of λ



Discovering a second Higgs doublet via A0 -> ZH0

and connection to EW baryogenesisGláuber Carvalho Dorsch

very hard in MSSM, but possible in 2HDM



Gláuber Carvalho Dorsch




Requires sizable MA-MH mass split



LHC sensitivity to Higgs width



Higgs width and coupling constraints from thehigh-mass H V V process→

Nikolas Kaueralso in talk byJuan González Fraile

Higgs – SM BG interference is the key point for the sensitivity to the Higgs width!



Higgs width and coupling constraints from thehigh-mass H V V process→

Nikolas Kauer

Bounds are model-dependent!



Technicolour

SUSYUED

ADD

Twin Higgs

Little Higgs

RS RS CHM

Higgs boson is opening door to comprehensive test of underlying theory of Nature!



The main problem is to decode an underlying theory from the complicated set of signatures: down -> top

Tons of Signatures

SUSY UED ADD Twin Higgs

Little Higgs RS

CHM

top->downEasy

down->topVery

difficult



Tons of Signatures

SUSY UED ADD Twin Higgs

Little Higgs RS

CHM

top->downEasy

down->topVery

difficult

https://hepmdb.soton.ac.uk/

The main problem is to decode an underlying theory from the complicated set of signatures: down -> top



THANK YOU!

To all organizers and particular to Manfred for

fantastic workshop and weather (especially at the

excursion!)

To all speakers for very inspiring talks!

Thanks to everybody!

higgs and electroweak physics · dark matter connections – higgs and/or ew bosons portals...

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