Angular moments of the decay Λb0 → Λμ+μ at low hadronic recoil

The LHCb Collaboration

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)

Abstract

An analysis of the angular distribution of the decay Λb 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 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.
Original languageEnglish
Article number146
Number of pages27
JournalJournal of High Energy Physics
Volume2018
Issue number9
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • B physics
  • FCNC Interaction
  • Flavor physics
  • Hadron-Hadron scattering (experiments)
  • Rare decay

Cite this