TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - Observation of the Decay Xi(-)(b) -> pK(-)K(-)
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 071801
EP  - 11pp
VL  - 118
IS  - 7
PB  - Amer Physical Soc
AB  - Decays of the Xi(-)(b) and Omega(-)(b) baryons to the charmless final states ph(-)h'(-), where h((')) denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies root s = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb(-1). The decay Xi(-)(b) -> pK(-)K(-) is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Xi(-)(b) -> pK(-)pi(-) decay. Results are reported, relative to the B- -> K+K-K- normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Xi(-)(b) -> pK(-)pi(-) and Xi(-)(b) -> p pi(-)pi(-) relative to Xi(-)(b) -> pK(-)K(-) decays are also measured.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1612.02244
UR  - https://doi.org/10.1103/PhysRevLett.118.071801
DO  - 10.1103/PhysRevLett.118.071801
LA  - English
N1  - WOS:000394096000003
ID  - LHCbCollaborationAaij_etal2017
ER  -