Measurement of CP asymmetry in Bs 0→ Ds ∓K±decays


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LHCb collaboration c., Aaij R., Adeva B., Adinolfi M., Affolder A., Ajaltouni Z., ...More

Journal of High Energy Physics, vol.2014, no.11, pp.1-30, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2014 Issue: 11
  • Publication Date: 2014
  • Doi Number: 10.1007/jhep11(2014)060
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-30
  • Keywords: CP violation, CKM angle gamma, B physics, Flavor physics, Hadron-Hadron Scattering
  • Open Archive Collection: AVESIS Open Access Collection
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

Abstract: We report on measurements of the time-dependent CP violating observables in Bs 0→ Ds ∓K±decays using a dataset corresponding to 1.0 fb−1of pp collisions recorded with the LHCb detector. We find the CP violating observables Cf= 0.53±0.25±0.04, Af ΔΓ= 0.37 ± 0.42 ± 0.20, (Formula presented.), where the uncertainties are statistical and systematic, respectively. Using these observables together with a recent measurement of the Bs 0mixing phase −2βsleads to the first extraction of the CKM angle γ from Bs 0→ Ds ∓K±decays, finding γ = (115− 43 + 28)° modulo 180° at 68% CL, where the error contains both statistical and systematic uncertainties.[Figure not available: see fulltext.].