Conveners
Electroweak, Top quark, and Higgs Physics
- Jianming Qian (University of Michigan (US))
- Qiang Li (Peking University (CN))
Electroweak, Top quark, and Higgs Physics
- Yang Zhang (Zhengzhou University)
- Junjie Cao (Henan Normal University)
Electroweak, Top quark, and Higgs Physics
- Yaquan Fang (Chinese Academy of Sciences (CN))
- Alexander Josef Grohsjean (Deutsches Elektronen-Synchrotron (DE))
Electroweak, Top quark, and Higgs Physics
- Alexander Josef Grohsjean (Deutsches Elektronen-Synchrotron (DE))
- Eleni Vryonidou (University of Manchester (GB))
Electroweak, Top quark, and Higgs Physics
- Jianming Qian (University of Michigan (US))
- Junjie Cao (Henan Normal University)
Electroweak, Top quark, and Higgs Physics
- Qiang Li (Peking University (CN))
- Rohini Godbole (Centre for Theoretical Studies (CTS))
Electroweak, Top quark, and Higgs Physics
- Eleni Vryonidou (University of Manchester (GB))
- Yaquan Fang (Chinese Academy of Sciences (CN))
With the full LHC Run 2 pp collision dataset collected at 13 TeV, very detailed measurements of Higgs boson properties can be performed using its decays into bosons. This talk presents measurements of Higgs boson properties using decays into bosons and their combination with fermionic decays, including production mode cross sections and simplified template cross sections, as well as their...
Several theories beyond the Standard Model predict the existence of new particles decaying into pairs of gauge bosons. These states generally have masses larger than that of the Higgs boson, while some theories predict resonances with masses smaller than it. The latest ATLAS results on searches for such resonances in final states with leptons and photons based on pp collision data collected at...
The LHC is exploring electroweak (EW) physics at the scale EW symmetry is broken. As the LHC and new high energy colliders push our understanding of the Standard Model to ever-higher energies, it will be possible to probe not only the breaking of but also the restoration of EW symmetry. We propose to observe EW restoration in double EW boson production via the convergence of the Goldstone...
Charged Higgs from Higgs doublets generally couples to fermions thus mainly decay to sermonic modes. However, the inert doublets cannot have such two-body decays and mainly decays via three-body. Even then the coupling of charged Higgs with Z and W bosons are absent at the tree-level due to custodial symmetry. SU(2) triplet Higgs boson with Y=0 hyper charge breaks the custodial symmetry...
The status of Standard Model vacuum stability with generic
problems beyond Standard Models (BSM) will be scrutinised.
We will see how addition of scalar from different SU(2) representations, i.e.
Inert Higgs Doublet model (IDM) and Inert Higgs triplet model (ITM) enhance the stability of electroweak vacuum[1]. Addition of fermions can decrease the stability and need additional scalar to...
We study the Higgs boson decays h -> c cbar, b bbar, b sbar, photon photon
and gluon gluon in the Minimal Supersymmetric Standard Model (MSSM) with
general quark flavor violation (QFV), identifying the h with the Higgs boson
with a mass of 125 GeV. We compute the widths of the h decays to c cbar,
b bbar, b sbar (s bbar) at full one-loop level in the MSSM with QFV.
For the h decays to...
We numerically investigate the B+L violation process by performing three-dimensional lattice simulations of a unified scenario of first-order phase transitions and the sphaleron generation. The simulation results indicate that the Chern-Simons number changes along with the helical magnetic field production when the sphaleron decay occurs. Based on these numerical results, we then propose a...
The LHC has not discovered any New Physics beyond the anticipated $h(125)$ boson, pushing the SUSY scale to multi-TeV, and new ideas abound for out-of-the-box searches, or Effective Field Theory with high cutoff scale. But, have we exhausted dimension-4 operators involving sub-TeV particles that are not exotic (non-XLP)? We advocate the existence of an extra Higgs doublet that possessess extra...
Testing the Yukawa couplings of the Higgs boson to quarks and leptons is important to understand the origin of fermion masses. The talk presents several new measurements in Higgs boson decays to two bottom quarks or two tau leptons, searches for Higgs boson decays to two charm quarks or two muons, as well as indirect constraints of the charm-Yukawa coupling. The production of Higgs bosons in...
Combining measurements of many production and decay channels of the observed Higgs boson allows for the highest possible measurement precision for the properties of the Higgs boson and its interactions. These combined measurements are interpreted in various ways; specific scenarios of physics beyond the Standard Model are tested, as well as a generic extension in the framework of the Standard...
Since the first idea by Brout, Engler and Higgs in 1964, the Higgs boson had been searched for intensively. Finally, it was discovered at a mass of about 125 GeV in 2012 by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) at CERN. While currently all measurements of e.g. cross sections and branching ratios show a good agreement with the Standard Model predictions, there are...
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many Supersymmetric extensions addressing such shortcomings introduce additional Higgs-like bosons which can be either neutral,...
Many new physics models, including supersymmetric extensions to the Standard Model such as two Higgs doublet models (2HDMs), predict the existence of new particles decaying into two bosons (W, Z, photon, or Higgs bosons) making these important signatures in the search for new physics. Searches for such diboson resonances have been performed in final states with different numbers of leptons,...
A review of the recent searches for Exotic Decays of the Higgs boson performed by the CMS experiment will be presented. Whilst it is an overview talk, the speaker can choose a couple of subjects to develop in more detail.
The physics programme at ATLAS involves a variety of Standard Model and Beyond Standard Model resonances decaying to two b quarks, including the Higgs Boson. In order to identify these resonances at high momentum, ATLAS has developed the boosted X→bb tagger, a new NN-based tagging algorithm which combines the flavour information of up to three sub-jets associated to the large-R jet capturing...
In this talk, vector boson scattering measurements performed by the CMS experiment will be presented. In addition to standard model measurements, some explanation of its application to search for new physics will also be shown.
The MicroBooNE detector is an 85-ton liquid argon time projection chamber that has been operating in Fermilab's neutrino beamlines since 2015. Although primarily designed to measure neutrino interactions, the high intensity meson beamlines coupled with the high resolution detector and excellent high-multiplicity electron, muon or pion identification, allows for searches for New Physics in rare...
A review of the recent searches for production of Higgs boson pairs (both resonant and non-resonant) performed by the CMS experiment will be presented. Whilst it is an overview talk, the speaker can choose a couple of subjects to develop in more detail.
To resolve the long-standing discrepancy between the precision measurement of bottom quark forward-backward asymmetry at LEP/SLC and the Standard Model prediction, we propose several novel methods to probe the $Zb\bar{b}$ coupling at the LHC and lepton-hadron colliders (HERA and EIC).
A comprehensive set of measurements of top quark pair and single top quark production in association with EWK bosons (W, Z or ɣ) using data collected by ATLAS and CMS detectors presented. The results are compared to theory predictions and re-interpreted as searches for new physics inducing deviations from the standard model predictions. The status of the search for four top quark production,...
Precision measurement of the Higgs boson properties is an important topic at the LHC and future collider experiments. We studied the potential to directly probe the maginitude and CP phase of the top quark Yukawa coupling in $t\bar th$ production with $h\to b\bar b$. The BDRS algorithm is used to tag the boosted Higgs, while the $t\bar t$ rest frame is constructed using $M_2$ assisted...
A review of the recent measurements of the SM Higgs couplings and properties performed by the CMS experiments will be presented. Whilst it is an overview talk, the speaker can choose a couple of subjects to develop in more detail.
$Z$ boson being a spin-one particle provides eight polarization parameters. We show how the $Z$ boson polarization can be used to study the $ZH$ production at future $e^+e^−$ colliders and at the LHC. Using the spin density matrix of the $Z$-boson we calculate the 8 independent polarization parameters which are sensitive to anomalous gauge-Higgs couplings. We then estimate bounds on the...
Abstract: We probe anomalous HZZ coupling through single Higgs boson production at the Large Hadron-electron collider with 60 GeV (7 TeV) of electron (proton) energy. The sensitivity of CP-even and CP-odd anomalous couplings are assessed through azimuthal angle difference between scattered electron and forward jets along with cross-section as a function of luminosity. Comparative studies for...
We study the measurement of Higgs boson self-couplings through
2→3 vector boson scattering (VBS) processes in the framework of Standard Model effective field theory (SMEFT) at both proton and lepton colliders. The SMEFT contribution to the amplitude of the 2→3 VBS processes, taking WLWL→WLWLh and WLWL→hhh as examples, exhibits enhancement with the energy BSMSM∼E2Λ2, which indicates the...
Boosted top quark tagging is one of the challenging tasks in high energy physics experiments, in particular in exploring new physics signals at the LHC. Several techniques are already developed to tag boosted top quark in its hadronic decay channel, and recently tagging in the semi leptonic channel also has been receiving a lot of attention. In this current study we try to develop...
[This talk will be on JHEP 1801 (2018) 011 by Soumita Pramanick and Amitava Raychaudhuri]
Three-higgs doublet model in $A4$ symmetric framework will be discussed.
It was observed that if we consider three $SU(2)_L$ doublet scalars forming a triplet under
$A4$ symmetry, alignment follows for four global minima configurations of the vacuum expectation values (vevs) naturally owing to the...
The LHCb experiment covers the forward region of proton-proton collisions, and it can improve the current electroweak landscape by studying the production of W and Z boson in this phase space complementary to ATLAS and CMS. In this talk an overview of the wide LHCb electroweak measurement program will be presented. Several preliminary studies have shown the potential of the LHCb experiment to...
Measurements of top quark cross sections and properties using data collected by the ATLAS and CMS experiment at 13 TeV are presented. Among them, latest precision results on production cross sections, top mass, angular correlations and charge asymmetries will be discussed.
The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM)
naturally provides a cold dark matter candidate, the neutralino, and it is also
able to explain current experimental observations and evade existing constraints.
In particular the EW sector of the MSSM can explain the discrepancy between the
experimental result for the anomalous magnetic moment of the muon...
We present the technical methods for the NLO SUSY-QCD corrections
to the production of the pseudoscalar MSSM Higgs boson in the gluon
fusion channel. While the genuine SUSY-QCD corrections have been cal-
culated in the limit of large SUSY particle masses some while ago, the
finite mass effects are unknown. In this talk, I will present the technical
details of our calculation of the NLO...
In this talk I will present the genuine SUSY-QCD corrections to the
production of the pseudoscalar Higgs boson in the Minimal Supersymmetric
Standardmodel (MSSM). These corrections have been numerically calculated
with no expansion in the mass ratios. A comparison to existing
approximations is done in order to see how significant the effects beyond
these approximations are. The...
