Phenomenology 2023 Symposium

Session

SM III

May 9, 2023, 2:00 PM

Lawrence Hall 106

Conveners

SM III

• Chiara Bissolotti (Argonne National Laboratory)

79. Measurements of Higgs boson production and decay rates and their interpretation with the ATLAS experiment

Shuo Han (Lawrence Berkeley National Lab. (US))

5/9/23, 2:00 PM

Higgs

The event rates and kinematics of Higgs boson production and decay processes at the LHC are sensitive probes of possible new phenomena beyond the Standard Model (BSM). This talk presents precise measurements of Higgs boson production and decay rates, obtained using the full Run 2 and partial Run 3 pp collision dataset collected by the ATLAS experiment at 13 TeV and 13.6 TeV. These include...

246. Non-resonant di-Higgs searches in bbtt, bbgg, bbZZ, bbWW, WWgg, and multilepton final states at CMS

Vivan Nguyen (Northeastern University (US))

5/9/23, 2:15 PM

We discuss the latest status of searches for nonresonant di-Higgs production with the CMS detector. In addition to the analysis strategy and limits on the production cross section of this process, constraints on the Higgs boson self-coupling and the coupling between two Higgs bosons and two vector bosons will be presented.

19. Measurements of Higgs boson properties (mass, width, and Spin/CP) with the ATLAS detector

Luca Franco (ATLAS)

5/9/23, 2:30 PM

Higgs

This talk presents precise measurement of the properties of the Higgs boson, including its mass, total width, spin, and CP quantum number. The measurements are performed in various Higgs boson production and decay modes, as well as their combinations. Observation of deviations between these measurements and Standard Model (SM) predictions would be a sign of possible new phenomena beyond the SM

21. Probing the nature of electroweak symmetry breaking with Higgs boson pairs in ATLAS

Christina Dimitriadi (ATLAS)

5/9/23, 2:45 PM

Higgs

In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...

131. Multi-photon decays of the Higgs boson at the LHC

Samuel Lane (KAIST)

5/9/23, 3:00 PM

Many new physics scenarios predict multi-photon Higgs resonances. One such scenario is the dark axion portal. The primary decay chain that we study is the Higgs to dark photon ($\gamma_D$) pairs that subsequently decay into a photon and an axion-like particle ($a$). The axion-like particles then decay into photon pairs. Hence, the signal is a six-photon Higgs decay: $h\rightarrow...

123. A Guide to Anomaly-Mediated Supersymmetry Breaking QCD

Andrew Wesley Gomes

5/9/23, 3:15 PM

Recently it has been demonstrated that anomaly-mediated supersymmetry breaking (AMSB) is a valuable tool for understanding the low-energy phases of non-SUSY gauge theories. For example, applying AMSB to SUSY SU(N) gauge theories with quarks in the fundamental leads to scalar potentials with chiral symmetry breaking minima. Furthermore, the application of AMSB to a class of SUSY SO(N) gauge...

47. The top quark legacy of the LHC Run II for PDF and SMEFT analyses

Maeve Madigan

5/9/23, 3:30 PM

BSM

I will present a study of the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available measurements based on the full Run II luminosity. First, we determine the constraints that...

37. Lighting up the LHC with Dark Matter

Tong Ou

5/9/23, 3:45 PM

BSM

We show that simultaneously explaining dark matter and the observed value of the muon's magnetic dipole moment may lead to yet unexplored photon signals at the LHC. We consider the Minimal Supersymmetric Standard Model with electroweakino masses in the few-to-several hundred GeV range, and opposite sign of the Bino mass parameter with respect to both the Higgsino and Wino mass parameters. In...