TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2014
DA  - 2014//
TI  - Observation of the Lambda(0)(b) -> J / psi p pi(-) decay
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 103
EP  - 19pp
VL  - 07
IS  - 7
PB  - Springer
KW  - B physics
KW  - CP violation
KW  - Branching fraction
KW  - Flavor physics
KW  - Hadron-Hadron Scattering
AB  - The first observation of the Cabibbo-suppressed decay Lambda(0)(b) -> J / psi p pi(-) is reported using a data sample of proton-proton collisions at 7 and 8TeV, corresponding to an integrated luminosity of 3 fb(-1). A prominent signal is observed and the branching fraction relative to the decay mode Lambda(0)(b) -> J / psi pK(-) is determined to be B(Lambda(0)(b) -> J / psi p pi(-))/ B(Lambda(0)(b) -> J / psi pK(-)) = 0.0824 +/- 0.0025 (stat) +/- 0.0042 (syst). A search for direct CP violation is performed. The difference in the CP asymmetries between these two decays is found to be ACP(Lambda(0)(b) -> J / psi p pi(-))/ A(CP)(Lambda(0)(b) -> J / psi pK(-)) = (+5.7 +/- 2.4 (stat) +/- 1.2 (syst))%, which is compatible with CP symmetry at the 2.2 sigma level.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1406.0755
UR  - https://doi.org/10.1007/JHEP07(2014)103
DO  - 10.1007/JHEP07(2014)103
LA  - English
N1  - WOS:000346567700001
ID  - LHCbCollaborationAaij_etal2014
ER  -