### Conveners

#### Higgs Expt., Theory and Phenomenology

- Jamie Tattersall (University of Heidelberg)
- Attilio Andreazza (Università degli Studi e INFN Milano (IT))

#### Higgs Expt., Theory and Phenomenology

- Roberto Castello (CERN)

#### Higgs Expt., Theory and Phenomenology

- Sven Heinemeyer (CSIC (Santander, ES))
- Maria Moreno Llacer (Georg-August-Universitaet Goettingen (DE))

#### Higgs Expt., Theory and Phenomenology

- Bohdan Grzadkowski (University of Warsaw)
- Stephen Martin (Northern Illinois University)

#### Higgs Expt., Theory and Phenomenology

- Petra Merkel (Fermi National Accelerator Lab. (US))
- LianTao Wang (University of Chicago)

#### Higgs Expt., Theory and Phenomenology

- Florian Urs Bernlochner (Universitaet Bonn (DE))

#### Higgs Expt., Theory and Phenomenology

- Rick Cavanaugh (University of Illinois at Chicago (US))
- Joseph David Lykken (Fermi National Accelerator Lab. (US))

#### Higgs Expt., Theory and Phenomenology

- Thomas Rizzo ()

Heather Logan
(Carleton University)

24/08/2015, 14:30

Higgs Theory and Experiment

I will review the current status of Higgs cross section and branching ratio calculations in the MSSM and other BSM theories with extended Higgs sectors.

Roberto Castello
(CERN)

24/08/2015, 15:00

Higgs Theory and Experiment

The most recent results about the Beyond Standard Model Higgs searches with the CMS experiment at the LHC will be presented. The talk would include material from SM Higgs, Exotica and SUSY analyses for the Higgs sector. Eventual new results for the Higgs searches with the Run 2 data will be detailed, if any.

Matteo Bauce
(Universita e INFN, Roma I (IT))

24/08/2015, 15:20

Higgs Theory and Experiment

We search for the pseudoscalar Higgs boson A of 2HDMs in the decay modes A-> tautau and A->Zh. In the latter case, h is the lightest neutral scalar Higgs boson and is assumed to be the newly discovered 125 GeV particle. The results are interpreted in the context of 2HDMs and the Minimal Supersymmetric Standard Model (MSSM).

Howard Haber
(University of California,Santa Cruz (US))

24/08/2015, 16:30

Higgs Theory and Experiment

It is possible that the electroweak scale is low in part due to selection effects, i.e., fine-tuning of the microscopic parameters. The experimental discovery of new light fundamental scalars other than the Standard Model Higgs boson would cast doubt on this theory, since generically such states imply parametrically worse fine-tuning with no compelling connection to selection effects. ...

Petar Kevin Rados
(University of Melbourne (AU))

24/08/2015, 16:50

Higgs Theory and Experiment

The combined measurements of the properties of the Higgs boson using the ATLAS detector and up to 25 fb-1 of 7 TeV and 8 TeV pp collision data collected in 2011 and 2012, are discussed. The results are obtained combining all channels measured at run 1. They include strengths of production and decay modes, couplings to fermions and bosons, spin and CP properties.

Sara Alderweireldt
(University of Antwerp (BE))

24/08/2015, 17:10

Higgs Theory and Experiment

The final LHC Run1 results in the search for a Higgs bosons decaying to bottom quarks performed by CMS is presented. Besides the standard model interpretation, well-motivated models with extended Higgs sectors are also being considered.

Peisi Huang
(University of Chicago/Argonne National Lab)

24/08/2015, 17:30

Higgs Theory and Experiment

We study the correlation between the Higgs trilinear coupling and the nature of Electroweak Phase Transition. We use two examples to illustrate this correlations -- a simplified model where we include higher order terms in the effective potential, and the NMSSM. We find a large deviation in the trilinear coupling from its Standard Model value in a theory that exhibits a strong first order...

Spencer Chang
(University of Oregon)

24/08/2015, 17:50

Higgs Theory and Experiment

In this talk, I will discuss scenarios of induced electroweak symmetry breaking (EWSB), where the Higgs vacuum expectation value is induced by another EWSB source. These additional sources can be due to another Higgs vev or technicolor sector and can mitigate constraints on beyond the Standard Model theories (e.g. raising the Higgs mass in supersymmetric models). I will discuss the collider...

Harri Waltari

24/08/2015, 18:10

Higgs Theory and Experiment

We study left-right symmetric supersymmetry and the constraints on its Higgs sector from LHC data. The model has a light doubly charged Higgs, whose mass comes from radiative corrections. The LHC bounds on the doubly charged Higgs mass reduce the parameter space significantly. We look at Higgs branching ratios and low energy constraints. We find that the Higgs decay width to bottom quarks can...

Cen Zhang
(Brookhaven National Laboratory)

25/08/2015, 14:30

Higgs Theory and Experiment

The discovery of the Higgs boson allows us to test the standard model at a new level. Ongoing and near future experiments on precision Higgs and EW observables requires a theory for SM deviations. While the kappa framework has been successful as a first attempt, a more consistent theory is required as one moves beyond leading order. In this talk I will summarize recent progress in the Higgs...

Lydia Brenner
(Nikhef)

25/08/2015, 15:00

Higgs Theory and Experiment

The discovery of the Higgs boson opens many perspectives to explore physics beyond the Standard Model. This talk describes constraints of new physics in a number of models using the combined measurements of the coupling strength of the 125 GeV Higgs particle using the entire ATLAS run-I data. The various models presented include an additional real electroweak singlet, two Higgs doublet models,...

Jérémy Bernon
(LPSC Grenoble)

25/08/2015, 15:20

Higgs Theory and Experiment

After the discovery of a 125 GeV Higgs boson with properties close to those predicted in the Standard Model (SM), it is crucial to assess the existence of an extended Higgs sector. The framework of the two Higgs doublet models (2HDM) is particularly simple and well suited for such considerations. The alignment limit, realized either through decoupling of the additional Higgs states or the...

Donald Austin Belknap
(University of Wisconsin (US))

25/08/2015, 15:40

Higgs Theory and Experiment

The talk will present a summary of the measurement of the Higgs properties using the H->ZZ->4l, H->WW->2l2nu and H->gammagamma decay channels, and the full dataset recorded by the CMS experiment during the LHC Run 1, corresponding to an integrated luminosity of 5.1 fb-1 at a center-of-mass energy of 7 TeV and up to 19.7 fb-1 at 8 TeV. The talk will present the measurements of the Higgs boson...

Florian Bernlochner
(Bonn)

25/08/2015, 16:30

Higgs Theory and Experiment

Recent results on studies of the Higgs boson in the diphoton decay channel are reported including limits on its width through interference effects, a study of its properties in
the context of an effective field theory, and its production in association with missing
transverse energy.

Daisuke Takahashi
(Okinawa Institute of Science and Technology Graduate University)

25/08/2015, 16:50

Higgs Theory and Experiment

We consider the minimal U(1)′ extension of the Standard Model (SM) with conformal invariance at the classical level, where in addition to the SM particle contents, three generations of right-handed neutrinos and a U(1)′ Higgs field are introduced. In the presence of the three right-handed neutrinos, which are responsible for the seesaw mechanism, this model is free from all the gauge and...

Daniel Egana-Ugrinovic
(Rutgers University)

25/08/2015, 17:10

Higgs Theory and Experiment

Effective field theory provides an excellent way to organize deviations from the Standard Model Higgs properties, in the case of an extended Higgs sector.
In this talk, we present the low energy theories of the Higgs sector for some of the most popular beyond the standard model UV completions. For brevity, we only consider the Higgs sector extended with a real singlet (xSM) and with a...

Julian Michael Bouffard
(State University of New York (US))

25/08/2015, 17:30

Higgs Theory and Experiment

Since the discovery of a Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties and the search for less sensitive channels in order to determine whether the new particle is the Standard Model (SM) Higgs boson. Of particular importance is the direct observation of the coupling of the Higgs boson to top quarks. In this talk a...

Dr
Ezequiel Rodriguez Jauregui
(Universidad de Sonora)

25/08/2015, 17:50

Higgs Theory and Experiment

In this work, the analysis of the Higgs sector in the context of the minimal $S(3)$-invariant extension of the Standard Model ($S(3)$SM) is performed. Three Higgs fields, which are SU(2) doublets, and CP invariant, are considered to compute the exact and analytical physical Higgs boson masses. Furthermore, within this model an explicit form of the trilinear self-couplings $\lambda_{ijk}$ are...

Maria Moreno Llacer
(Georg-August-Universitaet Goettingen (DE))

25/08/2015, 18:10

Higgs Theory and Experiment

Since the discovery of a Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its couplings in order to determine whether the new particle is the Standard Model Higgs boson. Combined analyses of the Higgs boson production and decay rates as well as of its coupling strengths to vector bosons and fermions have been performed using 7 TeV and 8...

Adrian Perieanu
(Hamburg University (DE))

27/08/2015, 14:00

Higgs Theory and Experiment

This talk will focus on the ATLAS and CMS Prospects for Higgs Physics at the HL-LHC, covering expected future performance and sensitivity in Higgs physics during the HL-LHC era.

Adarsh Pyarelal
(University of Arizona)

27/08/2015, 14:30

Higgs Theory and Experiment

While current ATLAS and CMS measurements exclude a light charged Higgs ($m_{H^\pm}<160$ GeV) for most of the parameter region in the context of the MSSM scenarios, these bounds are significantly weakened in the Type II 2HDM once the exotic decay channel into a lighter neutral Higgs, $H^\pm \to AW/HW$, is open. In this study, we examine the possibility of a light charged Higgs produced in...

Cecile Sarah Caillol
(Universite Libre de Bruxelles (BE))

27/08/2015, 14:50

Higgs Theory and Experiment

The most recent results from CMS on the search for a neutral Higgs bosons decaying into a tau or a muon pair will be presented. The production of a neutral Higgs boson via the gluon fusion or through associate production with b quarks are considered.

Sabine Kraml
(LPSC Grenoble)

27/08/2015, 15:10

Higgs Theory and Experiment

Searches in final states with two leptons plus missing transverse energy, targeting supersymmetric particles or invisible decays of the Higgs boson, were performed during Run 1 of the LHC. Recasting the results of these analyses in the context of the Inert Doublet Model (IDM) using MadAnalysis 5, we show that they provide constraints on inert scalars that significantly extend previous limits...

Prof.
Matthias Neubert
(Johannes Gutenberg University Mainz)

27/08/2015, 15:30

Higgs Theory and Experiment

We present a detailed analysis of the rare exclusive Higgs-boson decays into a single vector meson and a photon and investigate the possibility of using these processes to probe the light-quark Yukawa couplings. We work with an effective Lagrangian with modified Higgs couplings to account for possible new-physics effects in a model-independent way. The $h\to V\gamma$ decay rate is governed by...

Petra Merkel
(Fermi National Accelerator Lab. (US))

27/08/2015, 16:30

Higgs Theory and Experiment

Searches for additional Higgs-like bosons are reported for Higgs boson masses between 145 GeV and 1 TeV. The search is based on proton-proton collision data corresponding to an integrated luminosity of up to 5.1 inverse fb at the centre-of-mass energy of 7 TeV and up to 19.3 inverse fb at 8 TeV, recorded by the CMS experiment at the LHC. Several final states of the WW, ZZ, gammagamma, and...

Jan Hajer
(HKUST)

27/08/2015, 16:50

Higgs Theory and Experiment

Searching for Higgs bosons beyond the Standard Model (BSM) is one of the most important missions for hadron colliders. As a landmark of BSM physics, the MSSM Higgs sector at the LHC is expected to be tested up to the scale of the decoupling limit of O(1) TeV, except for a wedge region centered around tan β ~ 3–10, which has been known to be difficult to probe. In this talk, we present a...

Geoffrey Gilles
(Univ. Blaise Pascal Clermont-Fe. II (FR))

27/08/2015, 17:10

Higgs Theory and Experiment

Charged Higgs bosons, H+, are predicted by many models with an extended Higgs sector. This presentation reports ATLAS studies and results of searches for charged Higgs bosons in various final states. Exclusion limits are given and interpreted in the context of the Minimal Supersymmetric extension of the Standard Model.

Gouranga Kole
(Tata Inst. of Fundamental Research (IN))

27/08/2015, 17:50

Higgs Theory and Experiment

Recent results on searches for charged Higgs bosons at the LHC by the CMS collaboration are presented. Charged Higgs bosons have bean searched for in top quark decays for lower mass and directly produced for higher masses. Charged Higgs boson decays into tau nu, cs and tb have been exploited. Results are based on approximately 20 fb-1 of data collected at sqrt(s) 8 TeV at the LHC.

Andrea Tesi

28/08/2015, 14:20

Higgs Theory and Experiment

The presence of extra scalar singlets is a feature of several motivated extensions of the Standard Model, and the mixing of such a singlet with the Higgs boson is allowed to be quite large by current experiments. I will consider both direct and indirect searches, and quantify the current constraints as well as the prospects for future hadron and lepton machines. The results are first presented...

Kristina Anne Looper
(Ohio State University (US))

28/08/2015, 14:50

Higgs Theory and Experiment

We present the results of searches for non-Standard Model decays of the 125 GeV Higgs boson, including decays to dark sector bosons, lepton flavour violating and flavour changing decays, and decays to a light pseudoscalar neutral Higgs boson (a) predicted by the next-Minimal-Supersymmetric-Standard-Model.

Ahmed Ismail
(Argonne National Laboratory/University of Illinois at Chicago)

28/08/2015, 15:20

Higgs Theory and Experiment

Double Higgs production is a unique collider process, enabling the determination of the Higgs self-coupling. However, it is exceedingly rare in the Standard Model, due to the cancellation between the standard triangle and box contributions to the amplitude. I will demonstrate an analytic understanding of this cancellation, and its implications for the impact of new physics on Higgs pair...

Sunghoon Jung
(Korea Institute for Advanced Study (KIAS))

28/08/2015, 15:40

Higgs Theory and Experiment

We discuss new striking resonance shapes of MSSM heavy Higgs bosons from the resonance-continuum interference with a relative phase: pure resonance dips, nothingness and enhanced pure peaks. We derive conditions for them and devise the modified narrow width approximation(NWA) to work with non-zero imaginary parts. Importantly, ttbar resonance searches at the LHC are crucially impacted. But we...

Graham Cree
(Carleton)

28/08/2015, 16:50

Higgs Theory and Experiment

The results of searches for high mass Higgs bosons decaying to diboson (ZZ,WW,yy) final states by the ATLAS experiment are reported. In absence of the presence of a signal in the data, exclusion limits are presented.

JoAnne Hewett
(SLAC)

28/08/2015, 17:10

Higgs Theory and Experiment

Just as renormalizable Simplified Models can be used alongside of
effective field theories for the study of dark matter interactions, Simplified
Models can be used to describe new physics associated with
the Higgs boson. The objective is for the Simplified Model to
capture some of the new Higgs physics associated with a wide
range of UV-complete theories. Such models allow for...

Francesca Ricci-Tam
(University of California Davis (US))

28/08/2015, 17:30

Higgs Theory and Experiment

A new boson of mass 125 GeV has been discovered at the LHC. Within the present experimental uncertainties the properties of the new boson are in good agreement with the expectation for a standard model (SM) Higgs boson. The discovered SM-like Higgs boson may however be just one of several Higgs bosons, predicted by theories beyond the SM. Searches for additional neutral Higgs bosons beyond the...