Combination of the ATLAS, CMS and LHCb results on the $B^0_{(s)} \to \mu^+\mu^-$ decays

Combination of the ATLAS, CMS and LHCb results on the $B^0_{(s)} \to \mu^+\mu^-$ decays

CMS

Collaboration

2020

11 pages

Report number:

CMS-PAS-BPH-20-003

Experiments:

View in:

CERN Document Server

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reference search26 citations

Citations per year

Abstract:

A combination of results on the rare

B^0_s \to \mu^+\mu^-

and

B^0 \to \mu^+\mu^-

decays from the ATLAS, CMS, and LHCb experiments using data collected at the Large Hadron Collider between 2011 and 2016, is presented. The

B^0_s \to \mu^+\mu^-

branching fraction is obtained to be

(2.69\,^{+\, 0.37}_{-\, 0.35}) \times 10^{-9}

and the effective lifetime of the

B^0_s \to \mu^+\mu^-

decay is measured to be

\tau_{B^0_s \to \mu^+\mu^-} = 1.91^{+0.37}_{-0.35}

ps. An upper limit on the

B^0 \to \mu^+\mu^-

branching fraction is evaluated to be

\mathcal{B}(B^0 \to \mu^+\mu^-) < 1.6~(1.9)\times 10^{-10}

at

90\%

(

95\%

) confidence level. An upper limit on the ratio of the

B^0 \to \mu^+\mu^-

and

B^0_s \to \mu^+\mu^-

branching fractions is obtained to be

0.052~(0.060)

at

90\%

(

95\%

) confidence level.

Note:

Preliminary results

Monte-Carlo
p p: scattering
p p: colliding beams
B0: leptonic decay
B/s0: leptonic decay
B0: rare decay
B/s0: rare decay
muon: pair production
B0: branching ratio: upper limit
B/s0: branching ratio: measured

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Combination of the ATLAS, CMS and LHCb results on the B(s)0→μ+μ−B^0_{(s)} \to \mu^+\mu^-B(s)0​→μ+μ− decays

Citations per year

Combination of the ATLAS, CMS and LHCb results on the $B^0_{(s)} \to \mu^+\mu^-$ decays