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Measurement of the Bs0 μ+ μ- decay properties and search for the B0 μ+ μ- and Bs0 μ+ μ- γ decays

Journal Article · · Physical Review. D.
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  1. 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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