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Measurement of the CKM angle γ using B 0 → DK *0 with D → K S 0 π + π − decays

  • LHCb collaboration The LHCb collaboration
  • , R. Aaij
  • , C. Abellán Beteta
  • , B. Adeva
  • , M. Adinolfi
  • , Z. Ajaltouni
  • , S. Akar
  • , J. Albrecht
  • , F. Alessio
  • , M. Alexander
  • , S. Ali
  • , G. Alkhazov
  • , P. Alvarez Cartelle
  • , A. A. Alves
  • , S. Amato
  • , S. Amerio
  • , Y. Amhis
  • , L. An
  • , L. Anderlini
  • , G. Andreassi
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Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

A model-dependent amplitude analysis of the decay B0 → D(KS 0π+π−)K∗0 is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, recorded at √s=7 and 8 TeV by the LHCb experiment. The CP violation observables x± and y±, sensitive to the CKM angle γ, are measured to bex−=−0.15±0.14±0.03±0.01,y−=0.25±0.15±0.06±0.01,x+=0.05±0.24±0.04±0.01,y+=−0.65−0.23 +0.24±0.08±0.01, where the first uncertainties are statistical, the second systematic and the third arise from the uncertainty on the D → KS 0π+π− amplitude model. These are the most precise measurements of these observables. They correspond to γ = (80−22 +21)° and rB0 =0.39±0.13, where rB0 is the magnitude of the ratio of the suppressed and favoured B0 → DK+π− decay amplitudes, in a Kπ mass region of ±50 MeV around the K*(892)0 mass and for an absolute value of the cosine of the K*0 decay angle larger than 0.4.[Figure not available: see fulltext.]

Original languageEnglish
Article number137
JournalJournal of High Energy Physics
Volume2016
Issue number8
DOIs
Publication statusPublished - 1 Aug 2016

Keywords

  • B physics
  • CKM angle gamma
  • CP violation
  • Flavor physics
  • Hadron-Hadron scattering (experiments)

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