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Constraints on the K0S → μ+μ- Branching Fraction

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

LHCb Collaboration, Aaijj, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2020). Constraints on the K0S → μ+μ- Branching Fraction. Physical Review Letters, 125(23): 231801. doi:10.1103/PhysRevLett.125.231801.


Cite as: https://hdl.handle.net/21.11116/0000-0008-2C6A-1
Abstract
A search for the decay K-S(0) -> mu(+) mu(-) 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-S(0) -> mu(+) mu(-)) < 2.2 x 10(-10) at 90% C.L.. The limit reduces to B(K-S(0) -> mu(+) mu(-)) < 2.1 x 10(-10) at 90% C.L. once combined with the result from data taken in 2011 and 2012.