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Angular moments of the decay Λ<inf>b</inf><sup>0</sup> → Λμ <sup>+</sup> μ <sup>−</sup> at low hadronic recoil

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Aaij2018_Article_AngularMomentsOfTheDecayΛb0ΛΜΜ.pdf

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sword-2021-04-30T11:49:35.original.xml (130 B)
Original SWORD entry document
Date Issued
September 1, 2018
Journal
Journal of High Energy Physics
Version
Final published version
Abstract
© 2018, The Author(s). An analysis of the angular distribution of the decay Λb0 → 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 beAFBℓ=−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.[Figure not available: see fulltext.].
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DOI of Published Version
10.1007/JHEP09(2018)146
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