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 language | English |
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Article number | 146 |
Number of pages | 27 |
Journal | Journal of High Energy Physics |
Volume | 2018 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2018 |
Externally published | Yes |
Keywords
- B physics
- FCNC Interaction
- Flavor physics
- Hadron-Hadron scattering (experiments)
- Rare decay