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Andrea Incrocci (Karlsruhe Institute of Technology)10/1/26, 4:30 PMPoster
A new class of so-called "goofy" symmetries has been shown to lead to renormalization-group stable relations between parameters in two-Higgs-Doublet Models, not known before. In this work we investigate goofy transformations in the Standard Model (SM), extending them to the fermion sector. We show that the SM action is goofy "symmetric", if the Higgs mass term vanishes, while other SM...
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Dharmender Dharmender (University of Bristol)10/1/26, 4:50 PMTalk
A search for light Higgs bosons produced in supersymmetric cascade decays is being performed using Run-3 proton--proton collision data collected by the CMS experiment at $\sqrt{s}=13.6~\mathrm{TeV}$. The analysis targets events in which two light Higgs bosons decay into boosted $b\bar{b}$ pairs reconstructed as large-radius jets. Building upon the published Run-2 search, this work explores the...
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Hande Cetin (Middle East Technical University)10/2/26, 9:00 AMTalk
In this work, we plan to present the mass splitting analysis of the exotic particles $X(3872)$, or known as $\chi_{c1}(3872)$ and its bottomonium spectrum correspondant as tetraquark structures, using QCD Sum Rules. $X(3872)$ is amongst one of the most researched exotic particles in particle physics phenomenology with pending structure agreement. Its tetraquark correlation function is...
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Barbara Anna Erdelyi (Istituto Nazionale di Fisica Nucleare)10/2/26, 9:20 AMTalk
In this work we extend the existing literature on two-loop renormalisation group equations (RGEs) for the dimension-six Standard Model Effective Field Theory operator involving two gluons and two Higgs bosons. This operator generates an effective coupling between the Higgs boson and gluons. In particular, we extend and complete the contributions that enter the RGEs proportionally to...
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Patrick Hurley (University of Sussex)10/2/26, 9:40 AMTalk
The precision of Higgs-sector studies anticipated at the HL-LHC calls for a theoretical description of $t \bar t$-associated Higgs production in terms of exact matrix elements for the full $2\to7$ process $pp \to b\bar{b}\,e^{+}\nu_{e}\,\mu^{-}\bar{\nu}_{\mu} + H$. Computed with massive $b$ quarks, including the off-shell production and chain decays of the $t\bar{t}H$ and $tWH$ intermediate...
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Sayan Dhani (Istituto Nazionale di Fisica Nucleare)10/2/26, 10:00 AMTalk
The non-resonant production of Higgs boson pairs (HH) provides direct access to the Higgs trilinear self-coupling $λ_{HHH}$. By measuring it, we can determine the shape of the Higgs potential, making this search one of the central goals of the LHC physics program. Within the CMS Collaboration, these measurements are being analyzed in several final states, including HH→bbττ, which is a good...
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Mr Debabrata Sahoo (Institute of Physics Bhubaneswar)10/2/26, 11:00 AMTalk
The ATLAS search for pair-produced doubly charged Higgs bosons in multi-lepton final states using the full Run 2 dataset [Eur. Phys. J. C 83 (2023) 605] reports the strongest limits to date on the mass of such states, driven by an essentially background-free four-lepton channel. We show that the four-lepton signal efficiency implied by the auxiliary cutflow of that analysis exceeds a strict,...
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Zhirong Zhang (UC Berkeley)10/2/26, 11:20 AMPoster
Since the discovery of the Higgs boson in 2012, measurements of its couplings to fermions provide an important test of the mechanism of fermion mass generation. A key ingredient in measuring Higgs couplings to quarks is to distinguish jets initiated by different quark flavors, known as flavor tagging. This poster will present the principles and evolution of flavor tagging in ATLAS, from...
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Gabriele D'Anniballe (Istituto Nazionale di Fisica Nucleare)10/2/26, 11:40 AMTalk
The double-Higgs production process ($pp \to HH$) provides a direct probe of the Higgs boson trilinear self-interaction vertex and, consequently, to the shape of the Higgs potential, with profound implications for the understanding of electroweak symmetry breaking mechanism. At the LHC, the $HH \to b\bar{b}\tau^+\tau^-$ channel is among the most sensitive, thanks to its balance between...
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Lucio Derin (Istituto Nazionale di Fisica Nucleare)10/2/26, 12:00 PMTalk
The online identification of hadronic tau decays at the ATLAS High-Level Trigger has traditionally relied on Recurrent Neural Network (RNN) and DeepSet-based approaches. Following the broader adoption of graph and transformer-based architectures within ATLAS, we present a graph neural network (GNN)-based strategy for tau identification at the High-Level Trigger, building on the offline GNTau...
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Ivan Migunov (Alikhanian National Science Laboratory, AANL(Yerevan Physics Institute) / JINR)10/2/26, 12:20 PMTalk
Results of the study of the Higgs boson decay into a pair of b-quarks (H -> b bar-b) produced via vector boson fusion are presented. Within the framework of the Standard Model, this decay channel features the highest branching ratio, making it critically important for precision tests of theoretical predictions. The analysis is performed at the generator level using simulation parameters...
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Johannes Hornung (KIT)10/2/26, 12:40 PMTalk
Since the discovery of the Higgs boson, extensive measurements of its properties have set upper limits on the branching ratio of its yet undetected decay modes. The branching ratio encompasses immediate decays into SM particles that are not detectable, as well as decays into BSM particles. This talk focuses on a search for Higgs boson decays into pairs of hypothetical pseudoscalar bosons a, as...
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Juvenal Bassa (University of Puerto Rico (US))Talk
Jet classification is an essential component of many analyses in high-energy particle physics, including precision Higgs measurements and searches for physics beyond the Standard Model. In this work, we introduce an Ensemble Model (EM) that combines ResNet50 and InceptionV3 for jet-image classification using the JetNet dataset. Jets are represented as two-dimensional histograms in the (η, ɸ)...
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Debabrata Sahoo (Institute of Physics Bhubaneswar)Talk
We investigate the dark matter (DM) phenomenology and subsequent collider signatures of a dark leptoquark (LQ) model containing dark vector-like quarks (VLQs) and a scalar singlet. The dark LQs and VLQs participate in the radiative generation of Majorana neutrino masses at one loop. Since the coloured LQs and VLQs cannot serve as viable DM candidates, a $\mathbb{Z}_2$-odd singlet scalar is...
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Sudev Rajarshee Pradhan (University of Sheffield (GB))Talk
Hadronically decaying $\tau$ leptons are important signatures in many Standard Model and beyond-the-Standard-Model analyses at the LHC. This work presents a measurement of hadronic-$\tau$ identification scale factors using Run-3 $pp$ collision data collected by the ATLAS detector in 2022, 2023, and 2024. The measurement uses a tag-and-probe strategy in a $t\bar{t}$-enriched lepton+jets final...
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Debankana Nath (Universität Hamburg and DESY)Talk
The baryon asymmetry of the universe (BAU) observed in nature can be explained by electroweak baryogenesis which requires a strong first-order electroweak phase transition (SFOEWPT). This can be accomplished in a model with a scalar sector extension to the Standard Model (SM) such as the Two-Higgs-Doublet Model (2HDM). In this work, we focus on studying the strength of the phase transition...
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Sidra Tul Muntaha (Experimental High Energy Physics Department , National Centre for Physics & Quaid-i-Azam University (QAU), Islamabad, Pakistan.)Talk
My M.Phil thesis spans two complementary tracks: phenomenology of a rare
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Standard Model process, and qualification of detector hardware for the
HL-LHC. The associated production of a single top quark with a Higgs and a Z
boson (tHZ) is directly sensitive to the top-Higgs Yukawa coupling, including
its sign, and to the Higgs-gauge interplay. The feasibility study targets the
dilepton and...
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