Angular moments of the decay Λ0b → Λμ+μ− at low hadronic recoil
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Abstract
An analysis of the angular distribution of the decay Λ0b → 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.
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Bibliographic citation
Aaij, R., Adeva, B., Adinolfi, M. et al. Angular moments of the decay Λ0b → Λμ+μ− at low hadronic recoil. J. High Energ. Phys. 2018, 146 (2018). https://doi.org/10.1007/JHEP09(2018)146
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https://doi.org/10.1007/JHEP09(2018)146Sponsors
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© CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3 This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.