Precision measurements of the CKM angle ɣ, charm mixing and CP violation using the LHCb detector

by Timothy David Evans (Nikhef National institute for subatomic physics (NL))

Tuesday 25 Nov 2025, 11:00 → 12:00 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

 

Testing the Cabibbo–Kobayashi–Maskawa (CKM) paradigm for quark mixing is one of the primary goals of flavour physics. The angle γ of the unitarity triangle plays a special role in this programme as it is one of the cleanest theoretically observable quantities and has historically been the least precisely determined.  In the seemingly unrelated field of charm physics, oscillations between neutral charm mesons are now well understood, whereas CP violation in mixing remains elusive. The likely contribution of the Standard Model to this rare process is far below the current level of experimental precision. In this seminar, we will present the latest relevant measurements using data from the first two LHCb detector runs, and then combine all pertinent LHCb measurements to determine γ and key parameters in the charm sector. We will discuss how synergies between these apparently disparate measurements complement the traditional inputs from quantum-entangled charm produced in electron-positron colliders to improve precision in both sectors.

 

Refreshments will be served at 10h30