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 Lambda(0)(b) -> pK(-)mu(+)mu(-) and a search for CP violation
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 108
EP  - 17pp
VL  - 06
IS  - 6
PB  - Springer
KW  - B physics
KW  - CP violation
KW  - FCNC Interaction
KW  - Hadron-Hadron scattering (experiments)
AB  - A search for CP violation in the decay Lambda(0)(b) -> pK(-)mu(+)mu(-) is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb(-1). The Lambda(0)(b) -> pK(-)mu(+)mu(-) decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, Delta A(CP) equivalent to A(CP) (Lambda(0)(b) -> pK(-)mu(+)mu(-)) – A(CP) (Lambda(0)(b) -> pK(-)J/psi) and a(CP)((T) over cap -odd), where the latter is based on asymmetries in the angle between the mu(+)mu(-) and pK(-) decay planes. These are measured to be Delta A(CP) = (-3.5 +/- 5.0 (stat) +/- 0.2 (syst)) x 10(-2), a(CP)((T) over cap -odd) = (1.2 +/- 5.0 (stat) +/- 0.7 (syst)) x 10(-2), and no evidence for CP violation is found.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1703.00256
UR  - https://doi.org/10.1007/JHEP06(2017)108
DO  - 10.1007/JHEP06(2017)108
LA  - English
N1  - WOS:000404625300001
ID  - LHCbCollaborationAaij_etal2017
ER  -