LOC: Welcome Room: Gustav-Mie-Haus (ground floor)

Opening

• Pietro Slavich (LPTHE Paris)

Room: Gustav-Mie-Haus (ground floor)

Sparticle Decays at NLO QCD and Intelligent Scans in the NMSSM

• Felix Egle

Room: Gustav-Mie-Haus (ground floor) The next-to-minimal supersymmetric extension of the Standard Model (NMSSM) belongs to the most prominent, best motivated and experimentally widely tested beyond-SM extensions. For a meaningful interpretation of the experimental results and in order to be able to pin down the model underlying nature from the theory side, precise predictions for observables and parameters are crucial. Moreover, in view of the SM-like nature of the Higgs boson all relevant experimental and theoretical constraints have to be considered to corner valid new physics models. The code NMSSMCALC computes Higgs potential parameters and decays, including higher-order corrections. As an additional step in obtaining observables and predictions, the supersymmetric particle decays have to be calculated. Finally, because of the non-minimal number of input parameters, an intelligent scan procedure of the parameter space is required in order to investigate the parameter space, taking into account all relevant constraints and then providing interesting benchmark points. In this talk, we present our recent progress in incorporating the supersymmetric particle decays (including 2-body decays with NLO QCD corrections, 3-body decays, and radiative decays). We then also discuss the setup of a program chain for the performance of intelligent scans (e.g. via Markov chain Montecarlo or active learning) in the NMSSM with the tool BSMArt and other tools to check for experimental limits and constraints. Finally, we present some sample benchmark results.

Effective Field Theories for Heavy Higgs Bosons in Standard Model Extensions

• Sebastian Schuhmacher

Room: Gustav-Mie-Haus (ground floor) We integrate out the heavy scalar mass eigenstate in a real Higgs singlet extension of the Standard Model at one-loop order, taking into account full mixing and renormalization. We discuss the choice of a proper decoupling limit and matching of the result on SMEFT versus HEFT. Finally we validate convergence of predictions from the effective theory to the full result for a chosen set of electroweak precision observables.

Renormalization of the general Two-Higgs-Doublet Model

• Robin Feser

Room: Gustav-Mie-Haus (ground floor) The Two-Higgs-Doublet Model (THDM) is one of the simplest and most extensively studied extensions of the Standard Model of particle physics (SM). It offers a rich phenomenology, and can, depending on the region in parameter space, address phenomena such as the observed matter-antimatter asymmetry in the universe and dark matter, which cannot be fully explained by the SM.\\\\ When computing perturbative predictions for observables in the THDM (or any given QFT model), the choice of renormalization scheme should have no effect on all-order results. However, due to the truncation of the perturbation series, this choice affects the properties of finite-order predictions, such as gauge (in)dependence and perturbative stability. Therefore, it is valuable to study and compare different renormalization schemes with the goal of optimizing for such properties.\\\\ In this talk, we will give a brief description of the general THDM and explain the renormalization procedure we performed. Different renormalization schemes will be compared.

Renormalization of the C2HDM and the role of m3

• Duarte Fontes

Room: Gustav-Mie-Haus (ground floor)

Two-Loop Corrections to Trilinear Higgs Couplings in Higgs BSM models

• Alain Verduras Schaeidt (DESY)

Room: Gustav-Mie-Haus (ground floor) The precise determination of the Higgs self-couplings is an essential task for understanding electroweak symmetry breaking and probing physics beyond the Standard Model (SM). The calculation of two-loop corrections is important to provide a critical test of the perturbative stability, especially in the case of large one-loop corrections that can occur in scenarios with extended scalar sectors. Morever, they need to be taken into account for the future perspective of precisely measuring the Higgs self-couplings. In this talk, we will present our work on the leading two-loop corrections to the trilinear Higgs couplings in the two-Higgs-doublet model (THDM) and other models beyond the SM. We focus in particular on the couplings hhh, hhH , which are the most important for di-Higgs production at the (HL-)LHC. We will discuss the technical details of the calculation, in particular concerning the renormalization of the alignment limit, and briefly illustrate the phenomenological impact of our results.

Generic two-loop results for trilinear and quartic scalar self-interactions

• Martin Gabelmann (DESY)

Room: Gustav-Mie-Haus (ground floor)

Two-loop BSM corrections to h->gammagamma in a triplet extension of the SM

• Pietro Slavich (LPTHE Paris)

Room: Gustav-Mie-Haus (ground floor)

Update on Higgs mass calculation with FlexibleEFTHiggs ( cancelled :( )

• Johannes Wünsche

Room: Gustav-Mie-Haus (ground floor) FlexibleEFTHiggs is a hybrid method for the calculation of the SM-like Higgs mass in SUSY-models and is implemented in the spectrum generator FlexibleSUSY. This talk will include a recap of the method and some of its subtleties like the usage of the full-model parametrization in the calculation. The recent modifications of FlexibleEFTHiggs will be presented like the inclusion of 3-loop QCD matching corrections in the calculation of the Higgs mass in the NMSSM. Also, some new analyses and parameter scans will be shown.

Confronting a Standard Model extension with a dark $U(1)$ gauge sector with the prediction for the $W$-boson mass

• Heidi Angelika Rzehak

Room: Gustav-Mie-Haus (ground floor)

Interference effects in extended Higgs sectors (online)

• Georg Ralf Weiglein (Deutsches Elektronen-Synchrotron (DE))

Room: Gustav-Mie-Haus (ground floor)

Discussion on the future of KUTS Room: Gustav-Mie-Haus (ground floor)