Angular moments of the decay Lambda(0)(b) -> Lambda mu(+)mu(-) at low hadronic recoil
An analysis of the angular distribution of the decay Λ b 0 → Λμ+μ− 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 < q2 < 20 GeV2/c4. 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 𝐴ℓFB=−0.39±0.04(stat)±0.01(syst), 𝐴ℎFB=−0.30±0.05(stat)±0.02(syst), 𝐴ℓℎFB=+0.25±0.04(stat)±0.01(syst). The measurements are consistent with Standard Model predictions.
JHEP09(2018)146.pdf
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10-1007-JHEP09_2018_146.pdf
Publisher's version
openaccess
CC BY
587.74 KB
Adobe PDF
fb4c084fa6a3fe2f87a501589b5ed1b8