Constraints on the K 0 S → μ + μ − Branching Fraction

Physical Review Letters 2020
Kārlis Dreimanis, LHCb collaboration

A search for the decay K 0 S → μ + μ − is performed using proton-proton collision data, corresponding to an integrated luminosity of 5.6     fb − 1 and collected with the LHCb experiment during 2016, 2017, and 2018 at a center-of-mass energy of 13 TeV. The observed signal yield is consistent with zero, yielding an upper limit of B ( K 0 S → μ + μ − ) < 2.2 × 10 − 10 at 90% C.L.. The limit reduces to B ( K 0 S → μ + μ − ) < 2.1 × 10 − 10 at 90% C.L. once combined with the result from data taken in 2011 and 2012.

DOI
10.1103/PhysRevLett.125.231801
Hyperlink
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.231801

The LHCb Collaboration, Aaij, R., Abellán Beteta, C., Dreimanis, K. ... [et al.] Constraints on the K 0 S → μ + μ − Branching Fraction. Physical Review Letters, 2020, Vol. 125, No. 23, Article number 231801. ISSN 0031-9007. e-ISSN 1079-7114. Available from: doi:10.1103/PhysRevLett.125.231801

Publication language
English (en)