Searches for 25 Rare and Forbidden Decays of D+ and D+s Mesons

Journal of High Energy Physics 2021
Kārlis Dreimanis, Collaboration LHCb

A search is performed for rare and forbidden charm decays of the form D+(s)→h±ℓ+ℓ(′)∓, where h± is a pion or kaon and ℓ(′)± is an electron or muon. The measurements are performed using proton-proton collision data, corresponding to an integrated luminosity of 1.6 fb−1, collected by the LHCb experiment in 2016. No evidence is observed for the 25 decay modes that are investigated and 90 % confidence level limits on the branching fractions are set between 1.4 × 10−8 and 6.4 × 10−6. In most cases, these results represent an improvement on existing limits by one to two orders of magnitude.

Keywords
Charm physics Flavour physics Flavour Changing Neutral Currents Hadron-Hadron scattering (experiments) Rare decay
DOI
10.1007/jhep06(2021)044
Hyperlink
https://link.springer.com/article/10.1007%2FJHEP06%282021%29044

The LHCb Collaboration, Aaij, R., Abellán Beteta, C., Dreimanis, K. ... [et al.] Searches for 25 Rare and Forbidden Decays of D+ and D+s Mesons. Journal of High Energy Physics, 2021, Vol. 2021, No. 6, Article number 44. ISSN 1029-8479. Available from: doi:10.1007/jhep06(2021)044

Publication language
English (en)