Search for D+(s) to pi+ mu+ mu- and D+(s) to pi- mu+ mu+ decays
LHCb collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato, S. Amerio,, Y. Amhis, L. Anderlini, J. Anderson
TL;DR
This study searched for rare non-resonant D+ and Ds+ decays into pi and mu pairs using LHCb data, setting the most stringent upper limits to date on their branching fractions.
Contribution
First search for non-resonant D+ and Ds+ decays into pi and mu pairs with LHCb data, establishing the tightest upper limits on their branching fractions.
Findings
No signals observed for the decays.
Set new upper limits on branching fractions.
Limits are the most stringent to date.
Abstract
A search for non-resonant D+(s) to pi+mu+mu- and D+(s) to pi-mu+mu+ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb-1, at sqrt(s) = 7 TeV recorded by the LHCb experiment in 2011. No signals are observed and the 90% (95%) confidence level (CL) limits on the branching fractions are B(D+ to pi+mu+mu-) < 7.3 (8.3) x 10-8, B(Ds+ to pi+mu+mu-) < 4.1 (4.8) x 10-7, B(D+ to pi-mu+mu+) < 2.2 (2.5) x 10-8, B(Ds+ to pi-mu+mu+) < 1.2 (1.4) x 10-7. These limits are the most stringent to date.
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