Measurement of the B s 0 → μ + μ - decay properties and search for the B 0 → μ + μ - and B s 0 → μ + μ - γ decays
Journal Article
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· Physical Review. D.
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- Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands). LHVb Collaboration. et al.
An improved measurement of the decay $$B^0_S$$ → $μ^+μ^-$ and searches for the decays $B^0$ → $μ^+μ^+$ and $$B^0_S$$ → $μ^+μ^-γ$ are performed at the LHCb experiment using data collected in proton-proton collisions at $$\sqrt{s}$$ = 7, 8 and 13 TeV. corresponding to integrated luminosities of 1, 2 and 6 fb-1, respectively. The $$B^0_S$$ → $μ^+μ^-$ branching fraction and effective lifetime are measured to be $$\mathscr{B}$$($$B^0_S$$ → $μ^+μ^-$) = (3.09$$^{(+0.46+0.15)}_{(-0.43-0.11)}$$) x 10-9 and $$τ(B^0_s →μ^+μ^-)$$ = (2.07 ± 0.29 ± 0.03) ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for $B^0$ → $μ^+μ^-$ and $$B^0_S$$ → $μ^+μ^-γ$ decays is found and the upper limits $$\mathscr{B}$$($$B^0$ → $μ^+μ^-$) < 2.6 x 10-10 and $$B^0_S$$ → $μ^+μ^-γ$ < 2.0 x 10-9 at 95% confidence level are determined, where the latter is limited to the range $$m_{μμ}$$ > 4.9 GeV/c2. Additionally, the ratio between the $B^0$ → $μ^+μ^-$ and $$B^0_S$$ → $μ^+μ^-$ branching fractions is measured to be $$\mathscr{R}_{μ+μ-}$$ < 0.095 at 95% confidence level. The results are in agreement with the Standard Model predictions.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- LHCb Collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1982793
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 105; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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