A search for the rare decays W+ → Ds+ γ and Z → D0 γ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 2.0 fb^−1. No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W+ → μ+ ν and Z → μ+ μ− decays as normalization channels. The upper limits are 6.5 × 10^−4 and 2.1 × 10^−3 at 95% confidence level for the W+ → Ds+ γ and Z → D0 γ decay modes, respectively. This is the first reported search for the Z → D0 γ decay, while the upper limit on the W+ → Ds+ γ branching fraction improves upon the previous best limit.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Search for the Rare Decays W+ → Ds+ γ and Z → D0 γ at LHCb. CHINESE PHYSICS C, 47(9), 1-13 [10.1088/1674-1137/aceae9].

Search for the Rare Decays W+ → Ds+ γ and Z → D0 γ at LHCb

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zucchelli, S.;
2023

Abstract

A search for the rare decays W+ → Ds+ γ and Z → D0 γ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 2.0 fb^−1. No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W+ → μ+ ν and Z → μ+ μ− decays as normalization channels. The upper limits are 6.5 × 10^−4 and 2.1 × 10^−3 at 95% confidence level for the W+ → Ds+ γ and Z → D0 γ decay modes, respectively. This is the first reported search for the Z → D0 γ decay, while the upper limit on the W+ → Ds+ γ branching fraction improves upon the previous best limit.
2023
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Search for the Rare Decays W+ → Ds+ γ and Z → D0 γ at LHCb. CHINESE PHYSICS C, 47(9), 1-13 [10.1088/1674-1137/aceae9].
Aaij, R.; Abdelmotteleb, A.S.W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/953108
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