26. Deutsche Physikerinnentagung 2022 (German Conference of Women in Physics)

Session

Physics Talks - Particle Physics Theory

45

Nov 27, 2022, 11:00 AM

Gaede-Hörsaal (KIT Campus South)

96. Numerical Investigation of Isospin Breaking Effects in 1+1D QED

Nuha Chreim (Bergische Universität Wuppertal)

11/27/22, 11:00 AM

Physics talks

Talk

We study the automatic fine-tuning of isospin breaking effects by conformal coalescence found by Howard Georgi in the 2-flavor Schwinger model, i.e. 1+1D QED. Numerical investigation of pion mass splitting on a 1+1 dimensional lattice confirms that the symmetry breaking effects are exponentially suppressed in the fermion mass $m_f$ even for large splittings of $\delta m \approx m_f$. Some...

154. Non-thermal particle production after first-order phase transitions: what happens after bubbles collide?

Henda Mansour (University of Hamburg)

11/27/22, 11:15 AM

Physics talks

Talk

In a cosmological first-order phase transition, bubbles of true vacuum nucleate and expand due to the difference in vacuum energy. We study non-thermal particle production from the collisions of such bubbles, which can be relevant for many beyond the Standard Model scenarios, such as baryogenesis and dark matter. The bubble collisions result in local excitations of the background scalar field,...

88. Strong first-order electroweak phase transition in selected extended scalar sector models

Lisa Biermann (Institute for Theoretical Physics, Karlsruhe Institute of Technology)

11/27/22, 11:30 AM

Physics talks

Talk

To explain the observed baryon asymmetry of the universe (BAU) in an electroweak baryogenesis (EWBG) scenario, beyond the standard model (BSM) models are required to fulfill the necessary Sakharov conditions, i.e. they need to provide sufficient departure from thermal equilibrium by enabling a strong first-order electroweak phase transition (SFOEWPT), as well as provide a source of additional...

58. GW waves and the triple Higgs boson coupling in the 2HDM

María Olalla Olea Romacho (DESY)

11/27/22, 11:45 AM

Physics talks

Talk

Many popular extensions of the SM require sizeable modifications to the trilinear Higgs boson coupling in order to accommodate a first-order electroweak (EW) phase transition. Cosmological first-order phase transitions can give rise to a primordial gravitational wave (GW) background which could be observable at future space-based GW detectors such as LISA. Focusing on the Yukawa type-II 2HDM...

140. Higgs pair production at the HL-LHC in the 2HDM: insight into trilinear Higgs couplings

Kateryna Radchenko

11/27/22, 12:00 PM

Physics talks

Talk

The Standard Model (SM) of particle physics predicts a minimal Higgs
sector and the existence of one Higgs boson that has already been
discovered at the Large Hadron Collider (LHC). However, nothing
prevents nature from having a non minimal Higgs sector. In
particular, when a set of theoretical and experimental constraints
are taken into account, it is possible to postulate theories beyond
the...

128. $q_T$-resummation for Higgs production via quark annihilation

Rebecca von Kuk (DESY)

11/27/22, 12:15 PM

Physics talks

Talk

In order to exploit the full potential of the high-precision measurements at LHC new theory predictions are needed. The Higgs boson plays an important role not only in the Standard Model (SM) but also in various BSM models. Thus, precise predictions of its kinematic distributions and of its decay products are crucial to be sensitive to possible deviations from the SM.
Unfortunately, in the...