Angular moments of the decay Λ[subscript b][superscript 0] → Λμ[superscript +]μ[superscript −] at low hadronic recoil
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Aidala, C. A
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Alexander, M.
Date Issued
September 2018
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration, et al. “Angular Moments of the Decay Λ[subscript b][superscript 0] → Λμ[superscript +]μ[superscript −] at Low Hadronic Recoil.” Journal of High Energy Physics, vol. 2018, no. 9, Sept. 2018. © 2018 The Authors
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Final published version
Abstract
An analysis of the angular distribution of the decay Λ[subscript b][superscript 0] → Λμ[superscript +]μ[superscript −] is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately 5 fb[superscript −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[superscript 2] < 20 GeV[superscript 2]/c[superscript 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[subscript FB][supercript ℓ] = −0.39 ± 0.04 (stat) ± 0.01 (syst), A[subscript FB][superscript h] = −0.30 ± 0.05 (stat) 0.02 ± (syst), A[subscript FB][superscript ℓh] = + 0.25 ± 0.04 (stat) ± 0.01 (syst)
The measurements are consistent with Standard Model predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1007/JHEP09(2018)146
