Analysis of Neutral B-Meson Decays into Two Muons.
Phys Rev Lett
; 128(4): 041801, 2022 Jan 28.
Article
in En
| MEDLINE
| ID: mdl-35148154
ABSTRACT
Branching fraction and effective lifetime measurements of the rare decay B_{s}^{0}âµ^{+}µ^{-} and searches for the decays B^{0}âµ^{+}µ^{-} and B_{s}^{0}âµ^{+}µ^{-}γ are reported using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a luminosity of 9 fb^{-1}. The branching fraction B(B_{s}^{0}âµ^{+}µ^{-})=(3.09_{-0.43-0.11}^{+0.46+0.15})×10^{-9} and the effective lifetime τ(B_{s}^{0}âµ^{+}µ^{-})=2.07±0.29±0.03 ps are measured, where the first uncertainty is statistical and the second systematic. No significant signal for B^{0}âµ^{+}µ^{-} and B_{s}^{0}âµ^{+}µ^{-}γ decays is found and upper limits B(B^{0}âµ^{+}µ^{-})<2.6×10^{-10} and B(B_{s}^{0}âµ^{+}µ^{-}γ)<2.0×10^{-9} at the 95% C.L. are determined, where the latter is limited to the range m_{µµ}>4.9 GeV/c^{2}. The results are in agreement with the standard model expectations.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2022
Document type:
Article
Affiliation country:
Netherlands
Publication country:
EEUU
/
ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA