PPC 2023: XVI International Conference on Interactions between Particle Physics and Cosmology

Session

Parallel: BSM Theories and Flavor Physics

15 Jun 2023, 16:30

305 (IBS Science and Culture Center)

Conveners

Parallel: BSM Theories and Flavor Physics

• Sang Hui Im (Center for Theoretical Physics of the Universe, Institute for Basic Science, Korea)

24. Festina-Lente Bound on Higgs vacuum structure, inflation, and dark photon

Seong Chan Park (Yonsei University)

15/06/2023, 16:30

BSM Theories

The recently suggested Festina-Lente (FL) bound provides a lower bound on the masses of U(1) charged particles in terms of the positive vacuum energy. Since the charged particle masses in the Standard Model (SM) are generated by the Higgs mechanism, the FL bound provides a testbed of consistent Higgs potentials in the current dark energy-dominated universe as well as during inflation. We study...

105. Geometric view for the PNGB potential

Dong Woo Kang (KIAS)

15/06/2023, 16:50

BSM Theories

We investigate the pseudo-Nambu-Goldstone bosons (pNGBs) potential in the geometrical point of view.
In this talk I will discuss how to essentially organise or structurally understand the pNGB potential without recourse to the UV symmetries.

57. On the mass spectrum of heavy Higgs bosons in two-Higgs-doublet model in the light of the CDF $W$-mass anomaly

Yongtae Heo (Chonnam National University)

15/06/2023, 17:10

BSM Theories

We analyze the mass spectrum of the charged and neutral Higgs bosons in the framework of two Higgs doublet model (2HDM) in the light of the precision measurement of the $W$ boson mass by the CDF collaboration. We have considered the most general 2HDM potential with explicit CP violation in the Higgs basis which contains the three CP-mixed neutral mass eigenstates $H_1$, $H_2$, and $H_3$ with...

74. Dark Z boson and the W boson mass anomaly

Kazuki Enomoto (KAIST)

15/06/2023, 17:30

BSM Theories

The dark Z boson is a new vector particle induced by an additional Abelian gauge symmetry. It interacts with the SM fermions via kinetic and mass mixings and provides a new source of parity violation. It is known that such a parity-violating effect can be tested by future precious measurements of the weak mixing angle at low energies. In this talk, we discuss the effect of the dark Z boson on...

39. Quark and lepton hierarchies from S4' modular flavor symmetry

Junichiro Kawamura (IBS-CTPU)

15/06/2023, 17:50

BSM Theories

We proposed models in which the hierarchical structure of the quark and lepton masses and mixing are explained by the $S_4^{\prime }$ modular flavor symmetry. This is the first explicit example which realizes all of the mass and mixing hierarchies from a single modular symmetry. The hierarchies are predominantly explained by the Froggatt-Nielsen mechanism due to the residual $Z_4^T$ symmetry,...

122. Nonminimally Assisted Inflation: A General Analysis

Sang Chul Hyun (Yonsei University)

15/06/2023, 18:10

The effects of a scalar field, known as the “assistant field,” which nonminimally couples to gravity, on single-field inflationary models are studied. The analysis provides analytical expressions for inflationary observables such as the spectral index (𝑛𝑠), the tensor-to-scalar ratio (𝑟), and the local-type nonlinearity parameter (𝑓𝑁𝐿(𝑙𝑜𝑐𝑎𝑙)). The presence of the assistant field leads to a...

89. Lepton Universality Violations by Kaluza-Klein Neutrinos in $b\to c\tau \nu$ Transition

Janus Aban (National Taiwan Normal University (NTNU))

Flavor Physics

A new world average calculated using the data from Belle, BaBar, and LHCb collaborations in 2022 yielded $R_D^{ave}=0.358\pm 0.028$ and $R_{D^{\ast }}^{ave}=0.285\pm 0.013$. The combined new world average has the largest pull of $4.1\sigma$ from SM predictions after incorporating all the recent developments in $B\to D^{(\ast )}$ that include form factors for predicting $R_{D^{(\ast )}}^{SM}$....