Study of beauty hadron decays into Pairs of charm hadrons

LHCb Collaboration

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29 Citations (Scopus)
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Abstract

First observations of the decays Λ0b→Λ+cD−(s) are reported using data corresponding to an integrated luminosity of 3  fb−1 collected at 7 and 8 TeV center-of-mass energies in proton-proton collisions with the LHCb detector. In addition, the most precise measurement of the branching fraction B(B0s→D+D−s) is made and a search is performed for the decays B0(s)→Λ+cΛ−c. The results obtained areB(Λ0b→Λ+cD−)/B(Λ0b→Λ+cD−s)=0.042±0.003(stat)±0.003(syst),[B(Λ0b→Λ+cD−s)B(¯B0→D+D−s)]/[B(Λ0b→Λ+cπ−)B(¯B0→D+π−)]=0.96±0.02(stat)±0.06(syst),B(B0s→D+D−s)/B(¯B0→D+D−s)=0.038±0.004(stat)±0.003(syst),B(¯B0→Λ+cΛ−c)/B(¯B0→D+D−s)<0.0022[95%  C.L.],B(B0s→Λ+cΛ−c)/B(B0s→D+D−s)<0.30[95%  C.L.].Measurement of the mass of the Λ0b baryon relative to the ¯B0 meson gives M(Λ0b)−M(¯B0)=339.72±0.24(stat)±0.18(syst)  MeV/c2. This result provides the most precise measurement of the mass of the Λ0b baryon to date.

Original languageEnglish
Article number202001
Number of pages9
JournalPhysical Review Letters
Volume112
Issue number20
DOIs
Publication statusPublished - 21 May 2014

ASJC Scopus subject areas

  • General Physics and Astronomy

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