Conveners
Higgs & Electroweak Physics
- Alberto Belloni (University of Maryland (US))
- Ashutosh Kotwal (Duke University)
- Ashutosh Kotwal (Duke University (US))
- Zhen Liu (U of Maryland)
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- David Sperka (Boston University (US))
Higgs & Electroweak Physics
- Ashutosh Kotwal (Duke University (US))
- David Sperka (Boston University (US))
- Zhen Liu (U of Maryland)
- Alberto Belloni (University of Maryland (US))
- Ashutosh Kotwal (Duke University)
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
Higgs & Electroweak Physics
- David Sperka (Boston University (US))
- Ashutosh Kotwal (Duke University (US))
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- Zhen Liu (U of Maryland)
- Alberto Belloni (University of Maryland (US))
- Ashutosh Kotwal (Duke University)
Higgs & Electroweak Physics
- Ashutosh Kotwal (Duke University (US))
- David Sperka (Boston University (US))
- Alberto Belloni (University of Maryland (US))
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- Zhen Liu (U of Maryland)
- Ashutosh Kotwal (Duke University)
Higgs & Electroweak Physics
- Alberto Belloni (University of Maryland (US))
- Zhen Liu (U of Maryland)
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- Ashutosh Kotwal (Duke University (US))
- David Sperka (Boston University (US))
- Ashutosh Kotwal (Duke University)
Higgs & Electroweak Physics
- Alberto Belloni (University of Maryland (US))
- Ashutosh Kotwal (Duke University (US))
- David Sperka (Boston University (US))
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- Ashutosh Kotwal (Duke University)
- Zhen Liu (U of Maryland)
Description
parallel sessions
The future circular collider (FCC) study released a conceptual design report (CDR) in January 2019. An electron machine is considered as a first step (FCC-ee) with up to four detectors. FCC-ee is capable of very high luminosities in a wide center-of-mass (ECM) spectrum from 90 to 365 GeV. FCC-ee provides a clean experimental environment, produces high luminosity for precision measurements of...
After the Higgs discovery, high-precision Higgs physics measurements are the natural next step to probe the TeV-scale. Circular e+e- colliders, besides the possibility of direct discoveries, allow for precise measurements of the Higgs boson properties, as well as for collecting large samples of W and Z bosons that will significantly improve the Standard Model parameters precision, such as the...
The SMEFT provides a scientifically sound framework for studying the Higgs boson properties at future e+e- colliders. All the Higgs couplings can be determined in a nearly model-independent way. One very nice feature about the SMEFT formalism is that the Higgs couplings are related to not only themselves but also to W and Z couplings, guided by the SU(2)xU(1) gauge symmetries. On the other...
New physics may well be linked to the SM sector via the Higgs portal. Hence the Higgs boson property measurements, including precision as well as exotic decays may provide new insight into the BSM physics. In this talk, I will discuss the Higgs width measurement through new interference effect and Higgs exotic decay sensitivities at future e+e- collider Higgs factories.
This talk will describe the search for the dimuon decay of the Higgs boson using the data corresponding to an integrated luminosity of 139 fb$^{−1}$ collected with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV at the Large Hadron Collider. Events are divided into several channels to target either the gluon-gluon fusion (ggF) Higgs production or the vector-boson-fusion (VBF) Higgs...
Rare decays of the Higgs boson to mesons are a promising laboratory to study couplings to lighter quarks and physics beyond the standard model. A search for decays of the Higgs and the Z boson to pairs of J/ψ and Y resonances with subsequent decays of the mesons into muon pairs is performed with the Compact Muon Solenoid detector at the Large Hadron Collider (LHC). A data sample of...
A measurement of the $ttH$ production in the diphoton decay channel is performed using 139 fb$^{-1}$ of pp collision data with a center-of-mass energy √s = 13 TeV recorded by the ATLAS experiment at the LHC. Two regions are defined to target either the fully hadronic or semi-leptonic decay of the top quark. In each, a boosted decision tree (BDT) is trained to create ttH enhanced categories....
A search is presented for the production of a Higgs boson in association with a single top quark by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV. The production cross section for this process is highly sensitive to the absolute values of the top quark Yukawa coupling, the Higgs boson coupling to vector bosons, and, uniquely, to their relative sign. Analyses using...
A search for associated production of a standard model Higgs boson with a top quark-antiquark pair ($\rm{t\bar{t}H}$), in which the Higgs boson decays into a $\rm{b\bar{b}}$ pair, will be presented. Latest results are shown obtained using pp collision data recorded by the CMS experiment. Candidate $\rm{t\bar{t}H}$ events are selected based on the number of leptons in the final state from the...
Associated production of $t$ and $\bar{t}$ quark pairs along with a Higgs boson is an important Standard Model process as the top-Yukawa coupling can be directly measured from this process. Being the heaviest of the Standard Model particles, the coupling of top quark to Higgs field is expected to be large. Any significant deviation in the rate of this process from standard model expectation is...
Higgs boson production cross-sections in proton-proton collisions are measured in the H→$WW^∗$→eνμν decay channel. The results are obtained from a data sample corresponding to an integrated luminosity of 36.1 /fb from √s=13 TeV pp collisions recorded by the ATLAS detector at the LHC. The product of the $H→WW^∗$ branching fraction times the gluon-gluon fusion and vector-boson fusion...
The Run II dataset of $pp$ collisions at $\sqrt{s}=$ 13 TeV taken with the ATLAS detector has resulted in multiple Higgs Boson analyses in the diphoton decay channel. These analyses measure the continuum diphoton background by fitting an analytic function to sideband regions in data. With this estimation comes a so-called “spurious signal” systematic uncertainty, meant to account for...
The analysis of data collected by the CMS experiment at a collision energy of 13 TeV for the Run 2 provided confirmation of the existence of a Higgs boson with a mass of 125 GeV and all the measurements about its properties were found consistent with the Standard Model predictions. Nevertheless a full reality of the Higgs mechanism to give mass to the particles cold not be established wit the...
We study the impact of R-parity violating Supersymmetry (RPV SUSY) on the 125 GeV Higgs production and decay modes at the LHC. We assume a heavy SUSY spectrum with multi-TeV squarks and SU(2) scalar singlets as well as the decoupling limit in the SUSY Higgs sector. In this case the lightest CP-even Higgs is SM-like when R-parity is conserved. In contrast, we show that when R-parity violating...
We present a search for di-Higgs production in the $HH\to b\bar{b}\gamma\gamma$ decay channel. The measurement uses 139fb$^{−1}$ of $pp$ collisions recorded by the ATLAS experiment at a center-of-mass energy of 13 TeV. Selected events are separated into multiple regions, targeting both the SM signal and BSM signals with modified Higgs self-couplings. The latest results will be presented.
ATLAS has an extensive search program studying di-Higgs signatures. These searches are interesting for their potential to find not only new resonances decaying to pairs of Higgs bosons, but also for their sensitivity to otherwise difficult to measure couplings of the Higgs boson, such as the self-coupling. Using 127 fb$^{-1}$ of Run 2 $pp$ collisions at $\sqrt{s}=13$ TeV, the ATLAS experiment...
A search for the production of two Higgs bosons, where one Higgs boson decays into two b quarks and the other decays into two Z bosons is presented. The analysis is based on data collected by the CMS detector during the 2016 proton-proton running of the LHC. Upper limits at 95% confidence level are placed on the production cross section of a narrow-width spin-0 or spin-2 particle decaying to a...
The Higgs boson is an integral piece of the Standard Model and knowing its properties helps to establish limits on and to lower the uncertainties of other parameters in a wide variety of analyses. This presentation will summarize the methods used to make the world's most accurate Higgs mass measurement which currently stands at: $m_{H} = 125.26 \pm 0.21$ GeV. This analysis studies the $H...
The question of naturalness of the Standard Model has been a hot topic since the discovery of the Higgs boson with a relatively light mass. It has been pointed out in the past that the mass of a scalar boson can be destabilized by loop corrections.
Many Beyond the Standard Model theories have been proposed to address this problem. It is possible that such mechanisms contribute to the...
Although Higgs boson has been discovered, but its self-couplings are poorly constrained, which leaves nature of Higgs boson undetermined. Motivated from difference potential than Landau-Ginzburg type, we systematically organize various new physics scenarios, psuedo-Goldstone Higgs, Coleman-Weinberg Higgs and Tadpole-induced Higgs, etc. We find that di-Higgs production at 27 TeV HE-LHC have...
The presence of weak-scale colored top partners is among
the simplest solutions to the Higgs hierarchy problem. In this talk,
I will examine the constraints on spin-0, spin-1/2, and spin-1 colored
top partners coming solely from their effects on the production and
decay rates of the observed Higgs with a mass of 125 GeV. Constraints
will be derived based on the Higgs precision data from...
We explored flavor universality violating models by studying dimension-six effective operators which modify the coupling between the first generation up-quarks, Higgs boson and $Z$ boson. Through the use of simulated boosted Higgs strahlung events at both the HL-LHC and HE-LHC, as well as existing ATLAS data for background estimates, projected constraints on the scale of new physics as...
The associated production of a Higgs and a $W$ boson is an important channel not only for observing the Higgs decay to $b$ quark pairs, but also for examining the interactions of the Higgs and gauge fields. Using the inference toolkit MadMiner, which combines matrix element information and machine learning techniques, we examine the sensitivity of this production mode to non-Standard Model...
The joint production of three vector bosons is a rare process in the Standard Model. Studies of triboson production can test the non-Abelian gauge structure of the SM theory and any deviations from the SM prediction would provide hints of new physics at higher energy scales. This talk presents the first evidence of $WWW$ triboson production by the ATLAS collaboration using data collected in...
The search for heavy resonances decaying into a pair of Z bosons leading to final states with four-charged leptons ($\ell\ell\ell\ell$) or two-charged leptons plus two neutrinos ($\ell\ell\nu\nu$) will be reported. Data used in the analysis were collected by the ATLAS experiment during Run II and correspond to a total integrated luminosity of 139 fb$^{-1}$. Different mass ranges for the...
We present a measurement of the shape of the Z boson rapidity for $Z/\gamma^{*} \to\mu^+\mu^- $ produced in $ p\bar p$ collision at $\sqrt s=$1.96 TeV. We use 8.6 fb$^{-1}$ of $ p\bar p$ data collected by the D0 detector at the Tevatron collider. The results are compared to NNLO QCD predictions using different sets of Parton Density Functions. We also present a measurement of the shape of...
The study of vector boson scattering (VBS) in $ZZjj$ events produced in proton-proton collisions with a center of mass energy of 13 TeV will be reported. Data used in analysis were collected by the ATLAS experiment during Run II and correspond to a total integrated luminosity of 139 fb$^{−1}$. Final states with four-charged lepton ($4l$) or two-charged lepton plus two neutrinos ($2l2\nu$) from...
Recent results on the measurement of the Z and W boson properties and production cross-section at CMS will be presented in this talk, with emphasis on precision measurements.
