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Adrian Darricau (LPCA)25/11/2025 14:15
In the context of Standard Model extensions via Majorana sterile fermions, the presence of additional CP violating phases (Dirac and Majorana) has been shown to be at source of important effects in charged lepton flavour violating (cLFV) transitions and decays.
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Here we will consider further angular observables that can be studied for polarised $\tau$ and $\mu$ cLFV decays. These include,... -
Sreemanti Chakraborti (IPPP Durham)25/11/2025 14:33BSM
Axion-like particles (ALPs) are compelling dark matter candidates, particularly in the "ultralight mass regime." In this talk, I will discuss the theoretical framework for ALP interactions with Standard Model fields, emphasising the renormalization group (RG) running and low-energy matching in quantum field theory. Many quantum sensor experiments are designed to probe very light ALPs, which...
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Mojtaba Mohammadi Najafabadi (CERN and IPM)25/11/2025 14:51BSM
Axion-Like Particles (ALPs), arising from spontaneous global symmetry breaking in many Standard Model extensions, provide a compelling avenue for probing new physics. We study ALP production in association with top quarks through several channels at the LHC and future colliders. We focus in particular on light ALPs that escape detection and appear as missing transverse energy. Using full Run 2...
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Dr Florian NORTIER (CNRS/IN2P3 - IP2I Lyon)25/11/2025 15:09BSM
Light scalar fields are ubiquitous in theoretical (astro)particle physics and cosmology. From the perspective of effective field theories, these scalars encounter hierarchy problems unless their masses are protected by a symmetry. Non-standard UV completions involving non-localizable fields may introduce correlations between short and long distances, thereby generating a UV/IR mixing that...
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Shahram Vatani (CP3 UCLouvain)25/11/2025 16:00BSM
Gauge-fermion theories and their IR fate remain puzzling mysteries in QFT, even after decades of study. Beyond their theoretical interest, they could play a natural role in extensions of the SM, such as GUTs, dynamical symmetry breaking, and models of quark and lepton substructure. Yet our ignorance of these models severely hampers their potential application to realistic theories of nature....
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Wanda Isnard (IP2I Lyon)25/11/2025 16:18BSM
The idea of introducing extra spacetime dimensions has long been viewed as a promising way to extend the Standard Model, offering new tools to address some of its limitations. One interesting example is provided by asymptotic Grand Unified Theories (aGUTs), where the gauge couplings of the Standard Model forces do not unify at a single high-energy scale but instead evolve toward a common fixed...
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Timothee Pascal25/11/2025 16:36BSM
Despite the success of the Standard Model of particle physics, several evidence point towards the existence of physics beyond the Standard Model. However, no compelling signal of new physics has been observed so far, notwithstanding the slew of dedicated experimental searches. The absence of positive results and the stringent constraints reflect the need to shift from the usual top-bottom,...
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Gilberto Tetlalmatzi-Xolocotzi25/11/2025 16:54
In this talk, we will discuss the feasibility of measuring the Higgs self couplings through triple Higgs production at future proton–proton colliders. In particular, our study will focus on the 6 b final state.
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Moreover, we will explore the possibility of detecting extra scalars at the LHC as a result of an enhanced triple Higgs production cross section, with a particular emphasis on the Two... -
Jesus Pedro MARQUEZ HERNANDEZ (IJCLAB (CNRS))BSM
Future Higgs Factories will offer a clean environment to study $e^-e^+\rightarrow q \bar{q}$
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processes ($q=d,u,s,c,b$) at various centre-of-mass energies, from the Z-pole up to the TeV scale. In this contribution, we focus on the case of $e^-e^+\rightarrow s \bar{s}$
at $\sqrt{s}=250$ GeV, using full simulation and reconstruction within the ILD detector concept to evaluate differential...
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