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Title: Angular moments of the decay Λ b 0  → Λμ+μ− at low hadronic recoil
Authors: Aaij, Roel
Adeva, Bernardo
Adinolfi, Marco
Panshin, Gennady Leonidovich
Strokov, Sergey Aleksandrovich
Vagner, Aleksandr Rudolfovich
Keywords: физика; адронное взаимодействие; редкие рассеянные элементы
Issue Date: 2018
Publisher: Томский политехнический университет
Citation: Angular moments of the decay Λ b 0  → Λμ+μ− at low hadronic recoil / R. Aaij [et al.] // Journal of High Energy Physics. — 2018. — № 9. — [146, 26 p.].
Abstract: 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 beAℓFB=−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).AFBℓ=−0.39±0.04(stat)±0.01(syst),AFBh=−0.30±0.05(stat)±0.02(syst),AFBℓh=+0.25±0.04(stat)±0.01(syst).The measurements are consistent with Standard Model predictions.
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