4.5 Article

Search for the rare decays W+ →Ds+γ and Z → D0 γ at LHCb

期刊

CHINESE PHYSICS C
卷 47, 期 9, 页码 -

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IOP Publishing Ltd
DOI: 10.1088/1674-1137/aceae9

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W/Z boson; rare decay; upper limit of branching fraction

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A search for the rare decays W+ -> D-s(+)gamma and Z -> D-0 gamma was conducted using data from the LHCb experiment. No significant signal was observed. Upper limits were set for the branching fractions of W+ -> D-s(+)gamma and Z -> D-0 gamma at a 95% confidence level.
A search for the rare decays W+ -> D-s(+)gamma and Z -> D-0 gamma and is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 2.0fb(-1). No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W+ -> mu(+)nu and Z ->mu(+)mu(-)decays as normalization channels. The upper limits are and at 95% confidence level for W+ -> D-s(+)gamma and Z -> D-0 gamma the and decay modes, respectively. This is the first reported search for Z -> D-0 gamma the decay, while the upper limit on the Z -> D-0 gamma branching fraction improves upon the previous best limit.

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