## Angular moments of the decay Lambda(0)(b) -> Lambda mu(+)mu(-) at low hadronic recoil

An analysis of the angular distribution of the decay Lambda(0)(b) -> Lambda mu(+)mu(-) is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately 5 fb(-1). Angular observables are determined using a moment analysis of the angular distribution at low hadronic recoil, corresponding to the dimuon invariant mass squared range 15 < q(2) < 20 GeV2/c(4). The full basis of observables is measured for the first time. The lepton-side, hadron-side and combined forward-backward asymmetries of the decay are determined to be
A(FB)(l) = -0.39 +/- 0.04 (stat) +/- 0.01 (syst),
AFB(h) = -0.30 +/- 0.05 (stat) +/- 0.02 (syst),
A(FB)(lh) = +0.25 +/- 0.04 (stat) +/- 0.01 (syst).
The measurements are consistent with Standard Model predictions.

Published in:
Journal Of High Energy Physics, 9, 146
Year:
Sep 26 2018
Publisher:
New York, SPRINGER
ISSN:
1029-8479
Keywords:
Laboratories: