Apr 8 – 12, 2024
Maison MINATEC, Grenoble, FRANCE
Europe/Paris timezone

Measurements of $\gamma$ from tree-level decays at LHCb

Apr 10, 2024, 12:20 PM
Maison MINATEC, Grenoble, FRANCE

Maison MINATEC, Grenoble, FRANCE

3 Parv. Louis Néel, 38054 Grenoble
Regular parallel talk WG4: QCD with Heavy Flavors and Hadronic Final States WG4


Alessandro Bertolin


The only source of matter-antimatter asymmetry in the Standard Model (SM) of particle physics occur through the complex phase of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix. This complex phase is the origin of the violation of both the charge (C) and parity (P) symmetries. Violation of CP symmetry can be studied by measuring the angles of the CKM unitarity triangle. One of these angles, $\gamma$, can be measured using only tree-level processes; a method that, assuming new physics is not present in tree-level decays, has negligible theoretical uncertainty. Disagreement between such direct measurements of $\gamma$ and the value inferred from global CKM fits, assuming the validity of the SM, would indicate new physics beyond the SM. The precise determination of $\gamma$ is one of the most important goals of LHCb. $\gamma$ measurements have been obtained from several $B^+$, $B^0$ and $B_0^s$ decays using both time-independent and time-dependent measurements. These single measurements are combined to achieve the best experimental accuracy on $\gamma$. The proposed presentation will review the most recent single measurements of $\gamma$ and present the current status of the LHCb $\gamma$ combination, obtained with Run1 and Run2 data, followed by prospects for Run3 and beyond

Presentation materials