Valentina Corona

Measurement of CP asymmetries in Λb0→ph− decays

De Angelis, C.;Dettori, F.;Fabiano, F.;Manca, G.;Oldeman, R.;Provenzano, D.;Saitta, B.;
2025-01-01

Abstract

A search for CP violation in Λ0 b → pK− and Λ0 b → pπ− decays is presented using the full Run 1 and Run 2 data samples of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb−1 at center-of-mass energies of 7, 8, and 13 TeV. For the Run 2 data sample, the CPviolating asymmetries are measured to be ApK− CP ¼ ð−1.4 0.7 0.4Þ% and Apπ− CP ¼ ð0.4 0.9 0.4Þ%, where the first uncertainty is statistical and the second is systematic. Following significant improvements in the evaluation of systematic uncertainties compared to the previous LHCb measurement, the Run 1 dataset is reanalyzed to update the corresponding results. When combining the Run 2 and updated Run 1 measurements, the final results are found to be ApK− CP ¼ ð−1.1 0.7 0.4Þ% and Apπ− CP ¼ ð0.2 0.8 0.4Þ%, constituting the most precise measurements of these asymmetries to date.
2025
Inglese
111
092004
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.092004
Esperti anonimi
scientifica
Aaij, R.; Abdelmotteleb, A.  s.  w.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  a.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
1149
open
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