Conveners
Higgs Physics: 1
- Sarah Heim (Deutsches Elektronen-Synchrotron (DE))
- Jae Sik Lee (Chonnam National University)
Higgs Physics: 2
- Sarah Heim (Deutsches Elektronen-Synchrotron (DE))
- Jae Sik Lee (Chonnam National University)
Higgs Physics: 3
- KOJI TSUMURA (Kyoto University)
- Samira Hassani (Université Paris-Saclay (FR))
Higgs Physics: 4
- KOJI TSUMURA (Kyoto University)
- Samira Hassani (Université Paris-Saclay (FR))
Higgs Physics: 5
- Samira Hassani (Université Paris-Saclay (FR))
- Jae Sik Lee (Chonnam National University)
Higgs Physics: BSM+HIG Joint Session 1
- KOJI TSUMURA (Kyoto University)
- Kingman Cheung (National Tsing Hua University/Konkuk University)
Higgs Physics: 6
- KOJI TSUMURA (Kyoto University)
- Sarah Heim (Deutsches Elektronen-Synchrotron (DE))
Higgs Physics: BSM+HIG Joint Session 2
- Jae Sik Lee (Chonnam National University)
- Chung Kao (University of Oklahoma)
Higgs Physics: 7
- Sarah Heim (Deutsches Elektronen-Synchrotron (DE))
- KOJI TSUMURA (Kyoto University)
Higgs Physics: 8
- Samira Hassani (Université Paris-Saclay (FR))
- Jae Sik Lee (Chonnam National University)
The latest results of the measurement of the Higgs boson decaying to bottom quark pair will be presented. The analysis is performed using data collected with the CMS experiment in 2016 and 2017 at the LHC from pp collisions at centre-of-mass energies of 13 TeV.
The analysis that studies VH process with H->bb decays is presented based on the 13 TeV pp collision data. A clear excess of the VH with H->bb process over the predicted background is shown providing evidence for such a process. In addition a search for VBF production in the same decay channel is presented.
We present next-to-leading order QCD predictions for $Wb\bar b+n$-jet ($n=0,1,2,3$) production at the Large Hadron Collider with $\sqrt{s}=13$ TeV. We work in the four-flavor number scheme with a non-vanishing bottom-quark mass and include all subprocesses at leading electroweak order as well as all heavy-fermion-loop effects. We show the impact of QCD corrections for total as well as...
We study the Higgs boson (h) decay to two light jets at the 14 TeV High-Luminosity-LHC (HL-LHC), where a light jet (j) represents any non-flavor tagged jet from the observational point of view. The decay mode h→gg is chosen as the benchmark since it is the dominant channel in the Standard Model (SM), but the bound obtained is also applicable to the light quarks (j=u,d,s). We estimate the...
Precise measurment of the Higgs couplings is a central part of the energy-frontier physics program. Obtaining the small couplings to light states is particularly difficult. We describe a new technique for studying the Higgs coupling to the strange quark using H --> ssbar events at a 250 GeV e+e- collider. With this method, the sensitivity of the proposed FCC-ee collider is at a level of only a...
A general two Higgs doublet model (2HDM) is adopted to study the signature of
flavor changing neutral Higgs (FCNH) decay
$\phi^0 \to t\bar{c}+\bar{t}c$ and $\phi^0 \to \tau\mu$, where
$\phi^0$ could be a CP-even scalar ($H^0$) or a CP-odd pseudoscalar ($A^0$)
as well as $t \to c h^0$.
Measurement of the light 125 GeV neutral Higgs boson ($h^0$) couplings at the
Large Hadron Collider (LHC)...
Measurements of Higgs boson production in Higgs boson decays to two tau leptons based on pp collision data collected at 13 TeV are presented.
The latest results of the measurement of the Higgs boson decaying to tau lepton pairs will be presented. The analysis is performed using data collected with the CMS experiment in 2016 and 2017 at the LHC from pp collisions at centre-of-mass energies of 13 TeV.
A study of anomalous Higgs boson couplings and CP violation is presented using the Higgs boson decay mode with a pair of fermions in the final state. Associated production of the Higgs boson with two jets is used in this analysis, which is driven by the VBF, VH, and gluon fusion production mechanisms. Constraints on the anomalous couplings and CP-violating parameters are obtained by the CMS...
Future Higgs factories can reach impressive precision on Higgs property measurements. In this talk, we explore its sensitivity to new physics models at the electron-positron colliders. In particular, we study two categories of new physics models, Standard Model with a real scalar singlet extension, and Two Higgs Double Model as examples of weakly-interacting models, Minimal Composite...
The Standard Model predicts decay channels of the Higgs boson that are rare and have not yet been seen. Searches for Higgs boson decays to two muons or to a Z boson and a photon based on pp collision data collected at 13 TeV are presented.
The latest results on searches of Higgs boson rare decays will be presented. The talk includes H to \mu\mu and H to invisible analyses.
Theories beyond the Standard Model predict Higgs boson decays at a much enhanced rate compared to the Standard Model, e.g. for decays to Z+photon or a meson and a photon. This talk presents recent results based pp collision data collected at 13 TeV.
The searches for light pseudoscalar Higgs bosons pair produced from the decay of the 125 GeV Higgs boson and resulting in various final states (4mu, 4tau, 2mu2tau, 2b2tau) and low mass Higgs bosons will be summarised. The analyses are performed using data collected with the CMS experiment at the LHC from pp collisions at centre-of-mass energies of 13 TeV.
Theories beyond the Standard Model predict Higgs boson decays that do not exist in the Standard Model, such as decays into two light bosons (a). This talk presents recent results based on pp collision data collected at 13 TeV.
An overview of the latest results on the charged Higgs boson searches by the CMS collaboration is presented. Different production mechanisms, as well as multiple final states (e.g. tau nu, tb and cb) are covered, as different BSM models predict different dominant production and decay modes. Most of the results presented are based on the dataset of proton-proton collisions at center of mass...
The MSSM predicts the existence of additional neutral and charged Higgs bosons. This presentation will discuss results from recent searches for charged Higgs bosons in several decay channels based on collision data collected at 13 TeV, and their interpretation within the MSSM.
The MSSM predicts the existence of additional neutral and charged Higgs bosons. This presentation will discuss results from recent searches for neutral Higgs bosons in several leptonic decay channels based on collision data collected at 13 TeV, and their interpretation within the MSSM.
The latest results on searches of for extended Higgs boson sectors will be presented. MSSM Htautau, Hbb, high mass searches, and charged Higgs will be covered.
Several theories beyond the Standard Model predict the existence of new heavy particles decaying into pairs of gauge bosons. In this presentation the latest ATLAS results on searches for resonances decaying into pairs of W or Z bosons or photons, or into a Z boson and a photon, based on 36 fb-1 of pp collision data collected at 13 TeV will be discussed.
The latest set of results on Higgs decay to a W boson pair is presented. With a statistics of 36/fb collected by the CMS experiment at the LHC at 13 TeV center of mass energy, the Higgs to WW decay has been observed at CMS with more than 5 sigma for the first time, providing a significant contribution to the current fit of the Higgs boson couplings to fermions and vector bosons. Exploiting the...
Measurements of Higgs boson properties and cross sections measured in Higgs boson decays to two W bosons based on pp collision data collected at 13 TeV are presented.
The latest results of the measurement of the Higgs boson decaying into two photons will be presented. The analysis is performed using data collected with the CMS experiment in 2016 and 2017 at the LHC from pp collisions at centre-of-mass energies of 13 TeV.
Measurements of Higgs boson properties and cross sections measured in Higgs boson decays to two photons based on pp collision data collected at 13 TeV are presented.
New results on the on-shell and off-shell Higgs boson production in proton-proton collisions at the LHC are presented. The properties of the Higgs boson are measured in the four-lepton final state using the latest dataset collected at center-of-mass energy of 13 TeV recorded by the CMS detector. The production cross section of the Higgs boson times its branching fraction to four leptons...
Measurements of Higgs boson properties and cross sections measured in Higgs boson decays to four leptons based on pp collision data collected at 13 TeV are presented.
The measurement of fiducial inclusive and differential Higgs boson cross sections allows the study of its properties under a minimal set of assumptions. By defining a fiducial phase-space, the uncertainties due to model dependence and extrapolations are minimized. A new, extended set of measurements performed using 35.9/fb of pp collisions collected by the CMS experiment at LHC in 2016 is...
We study the phenomenology of partially composite-Higgs models where electroweak symmetry breaking is dynamically induced, and the Higgs is a mixture of a composite and an elementary state. The models considered have explicit realizations in terms of gauge-Yukawa theories and allow for a very SM-like Higgs state.
The possibility that the Higgs boson is a composite scalar is still open. In models that enjoy an underlying description in terms of a fundamental gauge-fermion dynamics, light scalars at the electroweak scale are predicted. Their properties can also be calculated starting from the underlying models. This leaves us with a predictive and controllable framework that can be tested at the LHC and...
In this talk, we consider models with the $U(1)_X$ gauge symmetry, which is spontaneously broken by dark Higgs mechanism. We discuss patterns of the electroweak phase transition and detectability of gravitational waves (GWs) when strongly first order phase transition occurs. We find the collider bounds exclude a part of parameter space that could generate detectable GWs otherwise. We show that...
Direct searches for New Physics states have given so far negative results, so there is a mass gap between SM fields and possible new fields. This mass gap justifies the use of electroweak effective Lagrangians for current energies. Implications of new, higher scales can be analyzed through next-to-leading order corrections of the electroweak effective theory. There are two main ingredients for...
We derive global constraints on new physics within the framework of the dimension-6 Standard Model Effective Field Theory. Our results include the latest theoretical and experimental updates on the electroweak precision observables, as well as the latest Higgs results from the LHC run 2. We also include in the combination the limits from diboson measurements. The results are presented as...
We discuss an improved model-independent Higg precision analysis of d=6 effective operators based on measurements of future lepton colliders. In particular, we focus on how to improve single Higgs couplings and Higgs triple coupling precisions. We identify main obstacles on obtaining sub-percent precisions on them and provide insights on how we may overcome them.
We perform the most up-to-date comprehensive signal-background analysis for Higgs-pair production in $HH \to b\bar b\gamma\gamma$ channel at the HL-LHC with the goal of probing the self-coupling $\lambda_{3H}$ of the Higgs boson. We simulate all the standard-model signal and background processes with the simulation tools almost as sophisticated as what experimentalists are using. At the...
Deep learning has been applied to many studies in high energy physics with substantial improvement over the traditional selection-cut methods. Based on deep-learning approaches, we perform a comprehensive signal-background analysis for Higgs-pair production in $HH \rightarrow b \bar{b} \gamma\gamma$ channel at the HL-LHC, with the goal of probing the self-coupling $\lambda_{3H}$ of the Higgs...
We present a new machine learning technique for the classification of scattering processes which include invisible particles missing in detector. With this purpose, new high-level feature variables are introduced, which can be obtained in the process of topological augmentation – a general reconstruction procedure of invisible missing momenta subject to various hypothetical decay topologies....
The search for standard model (SM) double Higgs boson (HH) production using data collected by the CMS detector at the CERN LHC will be presented, using final states from various decay channels: HH->bbbb, bbVV, bbtautau, and bbgammagamma. The HH production serves to measure the self-coupling of the Higgs boson, the rate of which is small in the SM. However, contributions from beyond standard...
Di-Higgs final states can arise through non-resonant production of two Higgs bosons and through potential heavy states decaying to two Higgs boson. This talk presents searches in several Higgs boson decay channels using 36 fb-1 of pp collision data recorded at 13 TeV.
The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb-1. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (“pileup”) superimposed to each event of interest, therefore providing extremely challenging experimental conditions. CMS prospects on Higgs self-coupling measurements and...
We discuss extension of the Zee-Babu model introducing local $U(1)_{L_\mu - L_\tau}$ symmetry with several singly-charged bosons. We find a predictive neutrino mass texture in a simple hypothesis that mixings among singly-charged bosons are negligible. Also lepton flavor violations are less constrained compared with the original model in such a scenario. Then we explore phenomenology of the...
It has been shown that the Next-to-Minimal Supersymmetric Standard Model (NMSSM) is a valid theory to describe inflation by Higgs bosons. In this model, the inflaton is a linear combination of the Higgs doublets while the Higgs singlet stabilizes the Higgs potential during inflation. The inflaton has a non-minimal coupling to gravity which appears in the low-energy effective Superpotential....
FlexibleSUSY is a software package that can solve boundary value problems and calculate the Higgs and BSM particle masses, as well as other observables such as the anomalous magnetic moment of the muon and EDMs in any BSM model (not just supersymmetric models). FlexibleSUSY is designed to be adaptable, fast, precise and reliable. I will describe FlexibleSUSY with particular emphasis on recent...
One of the most popular extensions of the Standard Model is the Two-Higgs-Doublet model (2HDM), in which a second Higgs doublet is added to the conventional Standard Model particle content. 2HDM's with a softly broken $Z_2$ symmetry avoid flavour-changing neutral Higgs currents at tree-level. They also comprise the Higgs sector of the Minimal Supersymmetric Standard Model. Current Higgs...
We study the extended Standard Model (SM) with an extra Higgs doublet and right-handed neutrinos.
If the symmetry to distinguish the two Higgs doublets is not assigned,flavor changing neutral currents (FCNCs) involving the scalars are predicted even at the tree level. In this talk, we investigate the constraints on the FCNCs at the one-loop level, and especially study the semileptonic $B$...
During this talk, the current constraints on the phenomenological MSSM (pMSSM) will be reviewed, focusing in particular on the Higgs sector. I will discuss the status of the pMSSM parameter space, and evaluate how future colliders, and higher energies or luminosities, can help probing the pMSSM Higgs sector.
In the high-scale (split) MSSM, the measured Higgs mass sets an upper bound on the supersymmetric scalar mass scale $\tilde{m}$ around $10^{10}$ ($10^{8}$) GeV, for $\tan\beta$ in the standard range and the central value of the top mass. It is demonstrated that $\tilde{m}$ can be pushed up close to the Planck scale while reproducing a correct Higgs mass due to potentially large negative...
The latest results of the measurement ttH production will be presented. The talk includes the search of tHq production.
The search for the production of the Higgs Boson with a pair of top-anti-top quarks is both very important and very challenging. This talks presents the analyses using Higgs boson decays to bbbar pairs, to multi-lepton final states using pp collision data collected at 13 TeV, as well as their combined results including also Higgs boson decays to two photons or Z bosons.
We present recent results from searches for the production of a Higgs boson in association with a single top quark (tHq), using data samples collected by the CMS detector in pp collisions at center-of-mass energy of 13 TeV. The searches exploit different top quark and Higgs boson decay modes resulting in final states with photons, bottom quarks, and multiple leptons, and employ multivariate...
Measurements of the Higgs boson mass in Higgs boson decays to two photons or four leptons, as well as their combination, based on pp collision data collected at 13 TeV are presented.
Combined measurements of the Higgs boson mass, production and decay rates, as well its couplings to vector bosons and fermions, are presented. The analysis uses the LHC pp collisions recorded by the CMS detector in 2016 at centre-of-mass energies of 13 TeV.
Measurements of Higgs boson production and cross sections based on the combination of several Higgs boson decay channels based on pp collision data collected at 13 TeV are presented.
In the Standard Model the many Yukawa couplings between the Higgs and fermions, responsible for the mass generation for fermions, are predicted to be strictly proportional to the masses of fermions. Any deviation from this prediction would clearly signal new physics beyond the SM. Many alternative ways of introducing Yukawa couplings in BSM models can result in quite different characteristics...
We use the LHC Higgs data to derive updated constraints on electroweak-scale sterile neutrinos that naturally occur in many low-scale seesaw extensions of the Standard Model to explain the neutrino masses. We also analyze the signal sensitivity for a new final state involving a single charged lepton and two jets with missing energy, which arises from the decay of sterile neutrinos produced...
The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb-1. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (“pileup”) superimposed to each event of interest, therefore providing extremely challenging experimental conditions. Prospects for measurements of the properties of the...
The plan for the International Linear Collider is now being prepared as a staged design, with the first stage at 250 GeV and later stages achieving the full project specifications with 4 ab-1 at 500 GeV. This talk will present the capabilities for precision Higgs boson measurements at 250 GeV and their relation to the full ILC program. It will show that the 250 GeV stage of ILC will already...
The Compact Linear Collider (CLIC) is a mature option for a future electron-positron collider operating at centre-of-mass energies of up to 3 TeV. CLIC will be built and operated in a staged approach with three centre-of-mass energy stages currently assumed to be 380 GeV, 1.5 TeV and 3 TeV. This contribution discusses the physics potential of CLIC in the area of Higgs physics based on...
Energy-frontier DIS can be realised at CERN through an energy recovery linac that would produce 60 GeV electrons to collide with the HL-LHC or later HE-LHC (LHeC) or eventually the FCC hadron beams (FCC-eh). It would deliver electron-proton collisions with centre-of-mass energies of 1.2 and 3.5 TeV, respectively, at luminosities exceeding $10^{34}$ cm$^{−2}$s$^{−1}$. The SM cross section for...
The future circular hadron-hadron collider FCC-hh is expected to produce collisions at the unrivaled center of mass energy of sqrt(s) = 100 TeV and to deliver an integrated luminosity of few tens of ab-1. As a result, billions of Higgs bosons will be produced. Having at disposal such humongous samples opens a wide range of possibilities in the realm of precision Higgs measurements. The Top...
After the Higgs boson discovery, the precision measurements and searches for new phenomena in the Higgs sector are among the most important goals in particle physics. Experiments at the Future Circular Colliders (FCC) are ideal to study these questions. Electron-positron collisions up to an energy of 350 GeV (FCC-ee) provide the ultimate precision with studies of Higgs boson couplings, mass,...
