@Article{LHCbCollaborationAaij_etal2015,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="Differential branching fraction and angular analysis of Lambda(0)(b) -> Lambda mu(+)mu(-) decays",
journal="Journal of High Energy Physics",
year="2015",
publisher="Springer",
volume="06",
number="6",
pages="115--29pp",
optkeywords="Rare decay; Hadron-Hadron Scattering; Branching fraction; B physics; Flavour Changing Neutral Currents",
abstract="The differential branching fraction of the rare decay Lambda(0)(b) -> Lambda mu(+)mu(-) is measured as a function of q(2), the square of the dimuon invariant mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), collected by the LHCb experiment. Evidence of signal is observed in the q(2) region below the square of the J/psi mass. Integrating over 15 < q(2) < 20 GeV2/c(4) the differential branching fraction is measured as dB(Lambda(0)(b) -> Lambda mu(+)mu(-))/dq(2) = (1.18(-0.08)(+0.09) +/- 0.03 +/- 0.27) x 10(-7) (GeV2/c(4))(-1) where the uncertainties are statistical, systematic and due to the normalisation mode Lambda(0)(b) -> J/psi Lambda , respectively. In the q(2) intervals where the signal is observed, angular distributions are studied and the forward-backward asymmetries in the dimuon (A(FB)(l)) and hadron (A(FB)(h)) systems are measured for the first time. In the range 15 < q(2) < 20GeV(2)/c(4) they are found to be A(FB)(l) = -0.05 +/- 0.09 (stat) +/- 0.03 (syst) and A(FB)(h) = -0.29 +/- 0.07 (stat) +/- 0.03 (syst).",
optnote="WOS:000356955000001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2288), last updated on Thu, 16 Jul 2015 11:49:35 +0000",
issn="1029-8479",
doi="10.1007/JHEP06(2015)115",
opturl="http://arxiv.org/abs/1503.07138",
opturl="https://doi.org/10.1007/JHEP06(2015)115",
archivePrefix="arXiv",
eprint="1503.07138",
language="English"
}