literature

Study of BDKπ+πB^{-}\to DK^-\pi^+\pi^- and BDππ+πB^-\to D\pi^-\pi^+\pi^- decays and determination of the CKM angle γ\gamma

Collaboration
May 26, 2015
20 pages
Published in:
  • Phys.Rev.D 92 (2015) 11, 112005
  • Published: Dec 17, 2015
e-Print:
Report number:
  • LHCB-PAPER-2015-020,
  • CERN-PH-EP-2015-127
Experiments:

Citations per year

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Abstract: (APS)
We report a study of the suppressed B-→DK-π+π- and favored B-→Dπ-π+π- decays, where the neutral D meson is detected through its decays to the K∓π± and CP -even K+K- and π+π- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0  fb-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B-→DK-π+π- and favored B-→Dπ-π+π- modes, as well as in the doubly Cabibbo suppressed D→K+π- final state of the B-→Dπ-π+π- decay. Evidence for the suppressed decay B-→DK-π+π-, with D→K+π-, is also presented. From the observed yields in the B-→DK-π+π-, B-→Dπ-π+π- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74-19+20)°. This is one of the most precise single-measurement determinations of γ to date.
Note:
  • 13.25.Hw
  • 12.15.Hh
  • p p: scattering
  • p p: colliding beams
  • B-: hadronic decay
  • suppression
  • meson
  • D: decay modes
  • rare decay
  • CKM matrix