Work

Time integrated CP violation in b decays (LHCb)

Year: 2024

Type: conference-paper

Abstract: CKM (Cabibbo-Kobayashi-Maskawa) mechanism, describing the coupling between up-type and down-type quarks through the weak interaction, is the main CP violation contribution to the quark sector of the Standard Model (SM). In particular, the precise measurement of the CKM angle $\gamma$ sets a benchmark for CP violation. A discrepancy between direct and indirect measurements would exhibit a strong evidence of physics beyond the SM. The CKMfitter group has notably proven that a $1^\circ$ precision on $\gamma$ direct measurement would lead to test SM up to dozens of TeV. In this document, we present the last LHCb combination of its various $\gamma$ measurements, which is currently the most precise determination of $\gamma$ from a single experiment. Two new analyses are also presented, the first one measuring CP violation in the decays $B^{\pm}\to D^0(\to h^+h^-\pi^+\pi^-)h^\pm$ and the second one measuring branching fractions of $B^0\to \bar{D}^{(*)0}\phi$ and $B_s^0\to \bar{D}^{(*)0}\phi$ decays, which can later lead to a $\gamma$ measurement with those channels.

Source: Annual Conference on Large Hadron Collider Physics (LHCP)

DOI: 10.22323/1.450.0067

Author: Jessy Daniel

Institutions: Centre National de la Recherche Scientifique, Université Clermont Auvergne, Laboratoire de Physique de Clermont Auvergne, Institut National de Physique Nucléaire et de Physique des Particules

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Science and Technology Facilities Council

Award: G7253814738