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 suppressed decay Lambda(0)(b) -> p pi(-) mu(+) mu(-)
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 029
EP  - 16pp
VL  - 04
IS  - 4
PB  - Springer
KW  - B physics
KW  - Branching fraction
KW  - Flavour Changing Neutral Currents
KW  - Hadron-Hadron scattering (experiments)
KW  - Rare decay
AB  - The suppressed decay Lambda(0)(b) -> p pi(-) mu(+) mu(-), excluding the J/psi and psi(2S) -> mu(+) mu(-) resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton- proton collision data corresponding to an integrated luminosity of 3 fb(-1) collected with the LHCb experiment. The Lambda(0)(b) -> p pi(-) mu(+) mu(-) branching fraction is measured relative to the Lambda(0)(b) -> J/psi (-> mu(+) mu(-)) p pi(-) branching fraction giving B (Lambda(0)(b) -> p pi(-) mu(+) mu(-))/B(Lambda(0)(b) -> J/psi (-> mu(+) mu(-)) p pi(-)) = 0.044 +/- 0.012 +/- 0.007, where the first uncertainty is statistical and the second is systematic. This is the first observation of a b -> d transition in a baryonic decay.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1701.08705
UR  - https://doi.org/10.1007/JHEP04(2017)029
DO  - 10.1007/JHEP04(2017)029
LA  - English
N1  - WOS:000399274800001
ID  - LHCbCollaborationAaij_etal2017
ER  -