Angular moments of the decay Λ<inf>b</inf><sup>0</sup> → Λμ <sup>+</sup> μ <sup>−</sup> at low hadronic recoil
Name
Aaij2018_Article_AngularMomentsOfTheDecayΛb0ΛΜΜ.pdf
Description
Published version
Size
587.74 KB
Format
Unknown
Checksum (MD5)
fb4c084fa6a3fe2f87a501589b5ed1b8
Author(s)
The LHCb Collaboration
Boettcher, Thomas Julian
Craik, Daniel C
Weisser, Constantin
Williams, Michael
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.].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP09(2018)146
