Conveners
Electroweak, Top and Higgs Physics
- Anne-Marie Magnan (Imperial College (GB))
Electroweak, Top and Higgs Physics
- Tao Han (University of Pittsburgh)
Electroweak, Top and Higgs Physics
- Anne-Marie Magnan (Imperial College (GB))
Electroweak, Top and Higgs Physics
- Stephen Martin (Northern Illinois University)
Electroweak, Top and Higgs Physics
- Anne-Marie Magnan (Imperial College (GB))
A review of the recent measurements of the SM Higgs couplings and properties will be given, covering both ATLAS and CMS. Whilst it is an overview talk, the speaker can choose a couple of subjects to develop in more details.
The status of HH searches at the LHC will be presented, covering both resonant and non-resonant searches. This is an overview talk. However results on some selected topics will be presented with more details,
I will talk about a double Higgs production via gluon fusion in the Effective Field Theory (EFT) framework where effects from new physics are parametrized by local operators.
The precise study of the properties of Higgs boson offers a unique and crucial opportunity to probe Physics beyond the Standard Model (BSM) indirectly. One important example of such property is the Higgs trilinear coupling, which determines the shape of the Higgs potential and in turn the nature of the electroweak phase transition (EWPT). It has been known for some time that, in a variety of...
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 focus on Type-I and Type-II Two Higgs Double Models as illustrative examples. We perform a global fit to various Higgs search channels to obtain the 95 C.L. constraints on the model parameter...
Searches for Higgs bosons in different extensions of the Standard Model (SM) are presented. These include models with additional scalar singlets, doublets, or triplets, and generic searches for models with couplings modified with respect to the SM or for non-SM Higgs boson decay channels. Results are based on data collected by the ATLAS in 2015 and 2016 at the LHC.
The speaker is invited to select 2 or 3 topics amongst the most recent results on exotic Higgs bosons, that will be presented in details.
Many BSM models, including SUSY, include extra scalars. A particularly well motivated model is the NMSSM and its corresponding 2HDM+S Higgs sector. I will discuss the challenges and opportunities presented for LHC searches due to the presence of such an extended Higgs sector.
The Randall-Sundrum models provide an appealing foundation to engineer BSM models, especially the ones which attempts to explain the small Higgs mass. The modulus field in these models (the "radion") should play a role in determining the value of the Higgs vacuum expectation value (VEV), and vice versa, as the Higgs VEV itself should backreact on the geometry. This would imply that the Higgs...
I will discuss the precision determination of the MSbar parameters of the Standard Model and their relation to observable quantities such as the top, Higgs, Z, and W pole masses at full 2-loop order with higher-order QCD effects. I describe a new computer program SMDR, which incorporates all of the known higher loop order effects. The program includes, for the first time, the relation of the...
We present the recently developed benchmark scenarios for MSSM Higgs-boson searches at the LHC. They take into account the recently improved Higgs-boson mass calculations as well as the latest data from direct Higgs-boson searches and measurements of the 125 GeV Higgs boson. The different phenomenology of these scenarios is highlighted.
We present the prospects of direct and indirect heavy SUSY Higgs boson searches for the HL-LHC and the ILC. They are based on the new set of benchmarks scenarios recently developed for SUSY Higgs-boson searches at the LHC.
We discuss a ∼ 3 σ signal (local) in the light Higgs-boson search in the diphoton decay mode at ∼ 96 GeV as reported by CMS, together with a ∼ 2 σ excess (local) in the b ̄b final state at LEP in the same mass range. We interpret this possible signal as a Higgs boson in the 2 Higgs Doublet Model with an additional real Higgs singlet (N2HDM). We find that the lightest Higgs boson of the N2HDM...
A comprehensive set of measurements of top quark pair and single top quark production in association with EWK bosons (W, Z or ɣ) is 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, to which the LHC experiments are starting to...
Measurements of top quark properties using data collected by the ATLAS and CMS experiment at 13 TeV are presented. Among them, latest results on top mass, ttbar spin correlations and charge asymmetries will be discussed.
Latest results on inclusive and differential top quark pair and single top quark production cross sections are presented using proton-proton collision data collected by CMS and ATLAS. The differential cross sections are measured as a function of various kinematic observables of the top quarks and the jets and leptons of the event final state. The results are confronted with precise theory...
Most of the methods to measure the top quark mass suffer from the jet energy scaling issue in achieving better precision. As a way to get around this issue, the study of B-hadron observables is motivated. While they do not involve such an issue, understanding underlying hadronization models is a key to achieve ~0.5% precision or better. In this presentation, I discuss the impact of the...
Top quark production can probe physics beyond the SM in different ways. Some processes, and especially certain angular correlations, are sensitive to the existence of anomalous top quark couplings. In the SM, flavour-changing neutral currents (FCNC) are forbidden at tree level and are strongly suppressed in loop corrections. Several extensions of the SM incorporate significantly enhanced FCNC...
Off-shell Higgs at the high mass tail may shed light on the underlying mechanism of the electroweak symmetry breaking. Due to the large cancellation in the standard model (SM) between the box and Higgs-mediated triangle diagrams, the gg → WW(ZZ) process in the SM is dominated by the VT VT transverse-mode at the high mass tail. The cancellation does not necessarily hold, when there is a...
Material should contain inclusive DY production of Z and W, which includes A-FB, angular coefficient, M_W, W helicity, and V+jets measurements including heavy-flavour (W+c, W+b, Z+b, Z+c). The speaker can choose to concentrate more on 2 or 3 recent results.
Double gauge boson production is one of the most important processes under study at the LHC. Of particular importance is the measurement of the trilinear electroweak gauge boson coupling, which sheds light on the gauge structure of the Standard Model. We study the impact of anomalous gauge boson and fermion couplings on the production of W+W− pairs at the LHC and how these couplings affect...
Electroweak-interacting massive particles (EWIMPs) exist in a broad class of new physics models beyond the Standard Model. The EWIMP generally affects the LHC signatures through quantum corrections even without direct productions. By measuring the Standard Model processes precisely, we can indirectly probe the EWIMPs. In this talk, we discuss the current constraint and future prospect of the...
We derive the electroweak (EW) collinear splitting functions up to single logs. We first derive the splitting functions in the unbroken limit, and then we systematically incorporate effects of EW symmetry breaking (EWSB), by imposing a particularly convenient gauge choice (dubbed “Goldstone Equivalence Gauge”) that disentangles the effects of Goldstone bosons and gauge fields in the presence...
The production of Higgs $(h)$ in association with a $Z$ boson from the neutral beyond the Standard Model (SM) gauge boson such as $Z^\prime$. We consider a scenario where the SM is extended by a general $U(1)_X$ group. The charges can be constrained by solving the anomaly free conditions. The $U(1)_X$ charge sector can be expressed in terms of charges of the Higgs and the BSM scalar such as...
CMS presented a 3 sigma (local) excess in light Higgs-boson searches in the diphoton final state at around 96 GeV. ATLAS results do not exclude this possible signal. LEP published a 2 sigma (local) excess in the same mass range in the bb final state. We present two SUSY models that can simultaneously explain both excesses, while being in agreement with all direct and indirect Higgs boson...
Within the framework of transverse-momentum-dependent factorization, we investigate for the first time the impact of a flavor-dependent intrinsic transverse momentum of quarks on the production of W bosons in hadronic collisions. We study the transverse-mass, lepton transverse momentum, and missing transverse momentum distributions of the W−decay products by means of a template-fit technique...
Vector-boson fusion and vector-boson scattering processes are studied using the data collected by the ATLAS and CMS detectors at the LHC.
The production of multiple electroweak bosons at the LHC constitutes a stringent test of the electroweak sector and provide a model-independent means to search for new physics at the TeV scale. Constraining the multiboson production through direct measurements also allows to constraint such backgrounds in SUSY searches.
