QCD@LHC 2025

Session

Higgs, electroweak, BSM physics

5

9 Sept 2025, 14:00

Meeting Room 102

Conveners

Higgs, electroweak, BSM physics: Parallel 1A

• Clara Lavinia Del Pio (Brookhaven National Lab)
• Hannah Arnold (Stony Brook University)
• Gaetano Barone (Brown University)

Higgs, electroweak, BSM physics: Parallel 1B

• Gaetano Barone (Brown University)
• Clara Lavinia Del Pio (Brookhaven National Lab)
• Hannah Arnold (Stony Brook University)

Higgs, electroweak, BSM physics: Parallel 2A

• Hannah Arnold (Stony Brook University)
• Gaetano Barone (Brown University)
• Clara Lavinia Del Pio (Brookhaven National Lab)

Higgs, electroweak, BSM physics: Parallel 2B

• Gaetano Barone (Brown University)
• Hannah Arnold (Stony Brook University)
• Clara Lavinia Del Pio (Brookhaven National Lab)

168. Measurements of multi-boson and rare electroweak processes at ATLAS and CMS (incl. VBS and polarization measurements)

Jonny Allen (The University of Manchester)

09/09/2025, 14:00

89. Polarized boson pairs at NLO in the SMEFT

Jakob Linder (Max-Planck Institut for physics)

09/09/2025, 14:22

We present a computation of inclusive diboson production in the $W^{\pm} Z$ channel at the Large Hadron Collider (LHC), incorporating leptonic decays of the gauge bosons and considering intermediate gauge bosons with definite polarization states. The analysis includes contributions from the Standard Model effective field theory (SMEFT) and is carried out at next-to-leading order (NLO) accuracy...

117. Quantum properties of H → V V ∗ : precise predictions in the SM and sensitivity to new physics

Priyanka Lamba

09/09/2025, 14:44

We study the quantum properties of the Higgs-boson decays into four fermions via two vector bosons (H→VV^∗→4f). In particular, we focus on the case of two different-flavour lepton pairs (H→ZZ^∗→μ+μ−e+e−). We compute the quantum-information observables for the corresponding two-qutrit system (ZZ) at next-to-leading order electroweak (NLO EW) accuracy in the SM. We find that NLO EW corrections...

169. Measurements of the Higgs-boson properties (mass, CP, width) at ATLAS and CMS

Alessandro Tarabini (ETH Zurich (CH))

09/09/2025, 15:05

170. Electroweak precision measurements at ATLAS and CMS (incl. Drell-Yann and W/Z mass measurements)

Takuya Nobe (University of Tokyo (JP))

09/09/2025, 16:00

38. Towards two-loop EW corrections at NLL in OpenLoops

Lorenzo Mai (University of Genova)

09/09/2025, 16:22

At energies above the Electroweak (EW) scale, higher-order EW corrections exhibit a logarithmic enhancement which is driven by the ratio of the typical scattering energy to the gauge-boson mass. At next-to-leading order (NLO) these corrections lead to factors amounting to several tens of percent in tails of kinematic distributions of crucial LHC processes, and still contribute a few percent at...

171. Higgs-boson cross-section measurements (fiducial, STXS,..) and their combinations at ATLAS and CMS (incl. kappa interpretation))

Marta Lanzac Berrocal (Univ. of Valencia and CSIC (ES))

09/09/2025, 16:44

111. RVVxV: Interference contributions to inclusive Higgs boson and Drell-Yan production at N4LO in QCD

Adi Suresh (Stanford University, SLAC)

09/09/2025, 17:06

We present partonic contributions to the inclusive gluon-fusion Higgs boson and Drell-Yan production cross sections at Hadron colliders at next-to-next-to-next-to-next-to leading order (N4LO). Specifically, we compute contributions due to the interference of one-loop amplitudes with two-loop amplitudes with three QCD partons and the Higgs boson or a virtual photon. Our result is in the form of...

172. EFT measurements and interpretations for Higgs & EWK processes at ATLAS and CMS

Darien Wood (Northeastern University (US))

09/09/2025, 17:28

173. Non-resonant HH searches and H+HH combinations by ATLAS and CMS

Lucrezia Boccardo (INFN e Universita Genova (IT))

11/09/2025, 09:00

101. Do large QCD corrections survive parton showers in di-Higgs decays?

Duarte Fontes

11/09/2025, 09:22

While significant effort has been devoted to precision calculations of di-Higgs production, the subsequent decays have received comparatively less attention. Recent studies have shown that fixed-order QCD corrections to fiducial di-Higgs decay rates can be sizable. In this talk, I demonstrate that these large corrections arise predominantly from soft and collinear QCD radiation and can...

78. Triple Higgs Boson Production at the LHC in Extended Scalar Sectors

Dr Andreas Papaefstathiou (Kennesaw State University, GA, USA)

11/09/2025, 09:44

Multi-Higgs boson production processes can provide essential insights into the scalar sector of the Standard Model (SM). Exploring the production of three Higgs bosons is primarily motivated by the unique opportunity it offers to measure the Higgs quartic self-coupling. Although observing triple Higgs production within the SM presents significant experimental challenges at the LHC, due to its...

174. Resonant HH and HHH searches at ATLAS and CMS

Emanuela Barberis (Northeastern University (US))

11/09/2025, 10:06

175. Measurements of rare Higgs-boson processes at ATLAS and CMS (excl. H→cc)

Arianna Gemma Garcia Caffaro (Yale University (US))

11/09/2025, 11:00

179. GraviWeak and Spontaneous symmetry breaking

Max Pezzelle

11/09/2025, 11:22

The maximal parity violation of electroweak physics has thus far been successfully described, but not yet explained in terms of more fundamental structures. Graviweak unification proposes to address this question by unifying gravity in its self-dual formulation with the weak interactions via their parallel chiral structures. In this work we showcase a graviweak model in which spontaneous...

176. Measurements of Higgs-quark interactions at ATLAS and CMS

Beatriz Ribeiro Lopes (CERN)

11/09/2025, 11:44

177. Beyond the Standard Model in the Higgs sector at ATLAS and CMS

Alexandra Carvalho Antunes De Oliveira (Peking University (CN))

11/09/2025, 12:06