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arXiv · 1606.08195

Novel approach to measure the leptonic eta(')->mu+mu- decays via charmed meson decays

Nguyen Thu Huong·Emi Kou·Benoit Viaud
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Abstract

In this article, we propose a novel approach to measure the branching ratios of the leptonic eta(')-> mu+mu- decays by using charmed meson decays, namely, D+(s)->pi+ eta(')(->mu+mu-) and D0->K-pi+eta(')(->mu+mu-). We advocate that the data available at LHCb can already yield a new measurement of Br(eta->mu+mu-) 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 centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.0/fb, the relative uncertainties to this branching ratio can be reduced down to ~10%. We also show that the first observation of Br(eta'->mu+mu-) may be possible with the Upgrade of the LHCb experiment.

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Nguyen Thu Huong, Emi Kou, Benoit Viaud. 2016-06-27. Novel approach to measure the leptonic eta(')->mu+mu- decays via charmed meson decays. https://doi.org/10.1103/physrevd.94.054040

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