Using pp collision data corresponding to an integrated luminosity of 1.0 fb^−1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B0s → K− π+ decays, A_CP(B0s → K− π+) = 0.27 ± 0.04(stat) ± 0.01(syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B0s mesons. Furthermore, we provide an improved determination of direct CP violation in B0 → K+ π− decays, A_CP(B0 → K+ π−) = −0.080 ± 0.007(stat) ± 0.003(syst), which is the most precise measurement of this quantity to date.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). First Observation of CP Violation in the Decays of B0s Mesons. PHYSICAL REVIEW LETTERS, 110(22), 1-9 [10.1103/PhysRevLett.110.221601].

First Observation of CP Violation in the Decays of B0s Mesons

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

Using pp collision data corresponding to an integrated luminosity of 1.0 fb^−1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B0s → K− π+ decays, A_CP(B0s → K− π+) = 0.27 ± 0.04(stat) ± 0.01(syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B0s mesons. Furthermore, we provide an improved determination of direct CP violation in B0 → K+ π− decays, A_CP(B0 → K+ π−) = −0.080 ± 0.007(stat) ± 0.003(syst), which is the most precise measurement of this quantity to date.
2013
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). First Observation of CP Violation in the Decays of B0s Mesons. PHYSICAL REVIEW LETTERS, 110(22), 1-9 [10.1103/PhysRevLett.110.221601].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; ...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/142522
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 161
  • ???jsp.display-item.citation.isi??? 124
social impact