IRN Terascale @ Heidelberg

Session

Beyond the Standard Model

20 oct. 2026, 09:30

International Academic Forum - Heidelberg University

17. An anomaly-free baryonic completion of the Standard Model

Arno Goudeau (LPTHE, Sorbonne University)

20/10/2026 09:30

1

BSM

We construct an explicit anomaly-free completion of a gauged baryon-number symmetry. The new gauge factor is $U(1)_{\tilde{B}}$: when restricted to the Standard Model fields its charge $\tilde{B}$ coincides with ordinary baryon number, whereas in the full theory it becomes an extended baryonic symmetry acting on both the Standard Model and a secluded sector. We show that anomaly cancellation...

19. Phenomenology of a $\{SU(2) \times U(1)\}^2$ Extension

Mohammed Khojali (IP2I - Université Lyon 1)

20/10/2026 09:55

BSM

In this talk, we extend the electroweak gauge group of the Standard Model by introducing extra gauge factors, $SU(2)_{L}\times SU(2)_{H} \times U(1)_{1} \times U(1)_{2}$. We analyze theoretical consistency, Higgs constraints, electroweak precision tests, and dark matter direct detection bounds. Our results show that the model can accommodate viable dark matter scenarios while remaining...

22. Hunting for Heavy Neutral Leptons at Future Lepton Colliders

Emanuelle Pinsard

20/10/2026 10:20

BSM

Heavy neutral leptons offer a promising avenue to explore neutrino mass generation and physics beyond the Standard Model. In this talk, I will discuss their discovery prospects at future lepton colliders, focusing on cLFV scattering at μTRISTAN and enhanced di-Higgs production at high-energy lepton colliders. These complementary probes highlight the potential of future colliders to uncover the...

11. Probing Flavorful EFTs at the LHC

Matheus Martines de Azevedo da Silva (University of São Paulo/Laboratoire De Physique Des 2 Infinite Irène Joliot-Curie)

20/10/2026 11:15

BSM

Since the discovery of the Higgs boson, no clear signs of New Physics (NP) have been observed at the LHC. This absence is consistent with a separation between the scale of NP and the electroweak scale. In this scenario, Effective Field Theories (EFTs) provide a model-independent framework for analyzing LHC data and searching for indirect effects of physics beyond the Standard Model. In this...

24. Vacuum Evolution of the R2HDM and the Induced Gravitational Wave and Collider Phenomenology

Christoph Borschensky (Karlsruhe Institute of Technology)

20/10/2026 11:40

BSM

Extended Higgs sectors beyond the Standard Model (BSM) allow to dynamically generate the observed baryon asymmetry of the Universe through electroweak baryogenesis and thereby solve one of the most prominent open problems of the SM. The strong first-order phase transitions (PTs), required to preserve the generated asymmetry in the electroweak vacuum, source gravitational waves (GW) that can be...

5. Modular symmetry models to explain leptonic flavour hierarchies

Victor Saulquin (Université de Strasbourg, IPHC)

20/10/2026 12:05

BSM

The problem of hierarchy in flavour physics suggests the existence of a broken flavour symmetry. Modular symmetry is one of them but needs only one field, the modulus, which simultaneously plays the role of a flavon and Yukawa couplings are promoted to function of this modulus. Fields transformations under modular symmetry are characterized by an integer called the weight and a representation...

10. Asymptotic Grand Unified Models

Prof. Aldo Deandrea (IP2I - Université Lyon 1)

BSM

I will introduce the idea of asymptotic unification, based on requiring a fixed point in the UV at the perturbative level for the evolution of the couplings, and discuss the constraints and phenomenological consequences for this class of models.