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Evelyn Jean Thomson (University of Pennsylvania (US))11/05/2026, 14:15
The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area with connections to dark matter and the naturalness of the Higgs mass. The small production cross-sections and challenging experimental signatures lead to difficult searches. This talk will highlight the most recent results of searches performed by the ATLAS...
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Gianfranco De Castro (Cornell University (US))11/05/2026, 14:30
Many models beyond the standard model predict new particles with long lifetimes. These long-lived particles (LLPs) decay significantly displaced from their initial production vertex thus giving rise to non-conventional signatures in the detector. Dedicated triggers and innovative usage of the CMS detector boost are exploited in this context to significantly boost the sensitivity of such...
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Ian Lewis (The University of Kansas)11/05/2026, 14:45
Scalar extensions of the Standard Model are of much interest at the Large Hadron Collider and future colliders. In particular, these models can give rise to resonant di-Higgs production and alter the Higgs trilinear coupling. In this talk, we study di-Higgs production in the Standard Model extended by a real scalar singlet with no additional symmetries. We determine how large the resonant...
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Vishakha Lingadahally11/05/2026, 15:00
The process of top quark pair production via the decay of the scalars in the 1-Higgs-Singlet extension of the Standard Model is associated with large interference effects between the loop-induced SM-like Higgs and heavy Higgs amplitudes, and the QCD continuum background. We attach leptonic decays to the di-top final state at NLO and study the effects of spin correlation in the process. We also...
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Mario Flores-Hernรกndez (University of Notre Dame)11/05/2026, 15:15
We study the decays $h \to \ell \bar{\ell} \left(Z \to \ell' \bar{\ell'}\right)$ and $h\to\ell\bar{\nu}_\ell\nu_{\ell'}\bar{\ell'}$ within the SMEFT framework and including effects up to $\mathcal O(1/\Lambda^4)$, where $\Lambda$ is the new physics scale suppressing higher dimensional operators. To work to this order, we must include the square of dimension-six operators and the interference...
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Terrance Figy (Wichita State University)11/05/2026, 15:30
Double- and triple-Higgs production provides direct access to the Higgs trilinear and quartic self-couplings, which determine the structure of the Higgs potential. Measuring these couplings is challenging at the LHC due to small production rates and luminosity requirements, particularly for the quartic interaction. Future muon colliders, with higher center-of-mass energies and cleaner...
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Yanhan Wang (Brown University)11/05/2026, 15:45
We study the prospects for probing exotic Higgs decays at a future muon collider in a minimal extension of the Standard Model with a light singlet scalar $S$. We focus on the process $h \to SS$ and consider two representative final states, $4b$ and $2b2\mu$. Our analysis is performed for muon collider benchmark scenarios at $\sqrt{s}=3~\mathrm{TeV}$ with $1~\mathrm{ab}^{-1}$ and...
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William Shepherd12/05/2026, 14:00
I present a novel technique for estimation of uncertainties arising from truncation of the EFT expansion perturbation series which exploits the calculability of partial next-order effects while removing degeneracies in effects of different operator combinations to provide a minimal (observable-dependent) set of nuisance parameters. This gives a manageable number of nuisances to be included in...
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Hongkai Liu (BNL)12/05/2026, 14:15
Top quark interactions offer a window into possible new high scale physics and many models of new physics predict that the top quark interactions will deviate significantly from those predicted by the Standard Model (SM). We present an analysis of the experimental restrictions on anomalous 4-fermion $e^+e^- t {\overline{t}}$ operators that is accurate to next-to-leading order (NLO) in both the...
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Sena Durgut (Carnegie-Mellon University (US))12/05/2026, 14:30
Axion-like particles (ALPs) with masses between 10 MeV and 10 GeV are notoriously hard to probe. The LHC experiments are uniquely positioned to test ALPs with such masses. The dominant production mechanism of electromagnetically coupled ALPs at the LHC is vector boson fusion (VBF). For light ALPs, the photons resulting from their decay tend to overlap, appearing as a single object in the the...
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Inci Karaaslan (University of Chicago (US))12/05/2026, 14:45
Motivated by the upcoming High-Luminosity Large Hadron Collider upgrade and the ongoing efforts towards a Muon Collider, we investigate the potential of future colliders to probe beyond the Standard Model physics through rare decay observables, all within the model-independent dimension-6 Standard Model Effective Field Theory (SMEFT) framework. We focus on operators involving electroweak gauge...
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Cristofer Caballeros (University of Florida)12/05/2026, 15:00
Effective Field Theories (EFTs) are a framework to probe physics beyond the Standard Model (BSM) in a model independent way. The Standard Model Effective Theory (SMEFT) provides an expansion of higher-dimensional operators that encode the effects of heavy new physics; however, in the operator basis there exists a redundancy in the space of field redefinitions which leaves on-shell amplitudes...
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Gianfranco De Castro (Cornell University (US))12/05/2026, 15:15
Among the intriguing scenarios of new physics that provide explanation to several shortcomings of the Standard Model (SM), hidden valley scenarios include a Dark Sector that extends the SM with a non-Abelian gauge group, similar to quantum chromodynamics with new matter and gauge fields analogous to the SM quark and gluon fields. This may result in a rich phenomenology which we can access...
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Abhik Sarkar (Indian Institute of Technology Guwahati)12/05/2026, 15:30
We investigate Higgs-gauge boson interactions using effective field theory approaches at both hadron and lepton collider frontiers. At the HL-LHC, we analyze the $Zh$ associated production mode by incorporating Higgs-gauge coupling modifiers in the $\kappa$ framework and dimension 6 SMEFT operators involving Higgs-current and dipole structures. Machine learning techniques are employed to...
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12/05/2026, 15:45
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Ian Pang12/05/2026, 16:30
How close are modern jet taggers to the fundamental statistical limit of their task? Generative models with tractable likelihoods offer a route to this question: treated as surrogates for the data distribution, they enable the construction of Neyman-Pearson-optimal classifiers. The resulting bound, however, is only as reliable as the surrogate. In this talk, I introduce the SUrrogate ReFerence...
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Jeongeun Lee (Seoul National University (KR))12/05/2026, 16:45
The quest for new physics is a major aspect of the CMS experimental program. This includes models involving resonances that can decay to photons, leptons or jets. This talk presents an overview of such analyses with an emphasis on new results and the novel techniques developed by the CMS collaboration to boost the search sensitivity. The searches are carried out with data of the Run-II and...
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Rafael Porto (Rutgers University)12/05/2026, 17:00
We build upon the results of the Via Machinae algorithm for stellar stream-finding in Gaia data, employing new tests to identify the stream candidates most likely to represent real stellar streams. We measure the consistency with which candidates are discovered across multiple retrainings of the Via Machinae neural density estimators, and we find that classifying candidates based on this...
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Storm Lin (Stony Brook University (US))12/05/2026, 17:15
The identification of jets containing b-hadrons is essential for many physics analyses at the LHC, including precision measurements of Higgs boson and top-quark processes, as well as searches for physics beyond the Standard Model. We present recent improvements in the discrimination of b-jets from jets originating from lighter quarks using the ATLAS detector. These advances are driven by...
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Katherine Schwind (The Ohio State University)12/05/2026, 17:30
This talk will briefly explore effective operator models where new light exotic (LEX) states interact with the Standard Model (SM) through the W-gluon portal. This portal allows access to LEX states with non-trivial representations under the SM gauge groups, and introduces new single production collider modes and phenomenological signatures at both the LHC and ep colliders. The talk will...
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Carlos Henrique de Lima (TRIUMF)12/05/2026, 17:45
In this talk, I present a newly proposed search strategy for GeV-scale particles that couple predominantly to light quarks at the LHC. Such models have often been assumed to be experimentally indistinguishable from QCD jets. We demonstrate that this is not the case: these particles can be perturbatively produced at the LHC and promptly decay into only a few hadrons, giving rise to jets with...
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Francesca Acanfora (Umass Amherst)12/05/2026, 18:00
Heavy spin-one particles are well motivated new physics candidates that can have their origin in weakly coupled extensions of the Standard Model gauge group or in strongly coupled Composite Higgs models. Due to the variety of production and decay modes, Heavy Vector Triplets (HVT) are a useful benchmark for the study and comparison of future colliders. The Muon Collider is particularly suited...
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Gregorio de la Fuente Simarro (Massachusetts Institute of Technology)12/05/2026, 18:15
Providing a practical and hadron-level definition of multiple jet flavors is a long-standing problem in collider physics. Previous work has introduced a data-driven, operational definition of quark and gluon jets, but no generalization to multiple jet flavors presently exists. To address this, we introduce a practical machine-learning framework to extract any number of flavors from any number...
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