Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 73: Flavour physics 3

T 73.6: Talk

Wednesday, March 6, 2024, 17:15–17:30, Geb. 30.41: HS 4

Measurement of D⁺ and D_s⁺ production asymmetries on pp collisions at the LHCb experiment with data from Run 3 — •Paula Herrero Gascon — Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

The production asymmetry of charm hadrons and anti-hadrons in pp collisions at the LHC is an important input to many CP violation measurements in the charm system. Thus their measurement is one of the first analyses carried out with the upgraded LHCb experiment. In this talk, we focus on the production asymmetries, A_P, of the D_(s)⁺ mesons exploiting their decay to φ π⁺. The raw asymmetries must be corrected for the different detection efficiencies of π⁺ and π⁻. These are determined in a data-driven approach via a tag-and-probe method applied in the abundant decay K_S⁰→π⁺π⁻. These results represent the first measurement of D⁺ and D_s⁺ production asymmetries at a center-of-mass energy of 13.6 TeV.

Keywords: asymmetries; charm; QCD