# Search for the rare decay $D^0 \to \mu^+ \mu^-$

Abstract : A search for the rare decay $D^0 \to \mu^+ \mu^-$is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb$^{-1}$, of $pp$ collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of \mbox{${\cal B}(D^0 \to \mu^+ \mu^-) < 6.2(7.6) \times 10^{-9}$} at \mbox{90%} \mbox{(95%)} confidence level. This result represents an improvement of more than a factor twenty with respect to previous measurements.
Document type :
Journal articles

https://hal.in2p3.fr/in2p3-00825119
Contributor : Danielle Cristofol Connect in order to contact the contributor
Submitted on : Thursday, May 23, 2013 - 8:09:34 AM
Last modification on : Saturday, June 25, 2022 - 9:08:48 PM

### Citation

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, et al.. Search for the rare decay $D^0 \to \mu^+ \mu^-$. Physics Letters B, Elsevier, 2013, 725, pp.15-24. ⟨10.1016/j.physletb.2013.06.037⟩. ⟨in2p3-00825119⟩

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