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Huong, N. T.; Kou, E.; Viaud, B.
Physical review. D, 09/2016, Letnik: 94, Številka: 5Journal Article
We propose a novel approach to measure the branching ratios of the leptonic η(′)→μ+μ− decays by using charmed meson decays, namely, D(s)+→π+η(′)(→μ+μ−) and D0→K−π+η(′)(→μ+μ−). We advocate that the data available at LHCb can already yield a new measurement of Br(η→μ+μ−) with accuracy competitive with the current world average. We also estimate that using the data collected by LHCb between 2015 and 2018 in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.0 fb−1, the relative uncertainties to this branching ratio can be reduced down to ∼10%. We also show that the first observation of Br(η′→μ+μ−) may be possible with the upgrade of the LHCb experiment.
