Search for the rare decays W+-> Ds+ gamma and Z -> D^0 gamma at LHCb

Brundu D.;Dettori F.;Fabiano F.;Litvinov R.;Manca G.;Oldeman R.;Saitta B.;Sun J.;
2023-01-01

Abstract

A search for the rare decays and is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13, corresponding to an integrated luminosity of 2.0 . No significant signal is observed for either decay mode and upper limits on their branching fractions are set using and decays as normalization channels. The upper limits are and at 95% confidence level for the and decay modes, respectively. This is the first reported search for the decay, while the upper limit on the branching fraction improves upon the previous best limit.
2023
Inglese
47
9
093002
13
Esperti anonimi
scientifica
Rare decay; Upper limit of branching fraction; W/Z boson
Lhcb, Collaboration; Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afshar ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
1072
open
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