Why is the B$_s$ meson peak in dimuon invariant mass spectrum wider than the others? Upsilon meson has a lifetime of several orders of magnitude shorter, which by my intution should lead the wider peak.
Fig 3.8 .Dimuon mass distribution collected with various dimuon triggers, during the 25 ns running period at 13 TeV in 2015. The coloured paths correspond to dedicated dimuon triggers with low $p_T$ thresholds, in specific mass windows, while the light gray continuous distribution represents events collected with a dimuon trigger with high $p_T$ thresholds
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