The first full angular analysis and an updated measurement of the decay-rate CP asymmetry of the D0 →p+p-µ+µ- and D0 → K+KK+K-µ+µ- decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. The dataset corresponds to an integrated luminosity of 9 fb-1. The full set of CP -averaged angular observables and their CP asymmetries are measured as a function of the dimuon invariant mass. The results are consistent with expectations from the standard model and with CP symmetry.
Angular Analysis of D0 → x plus x-μ plus μ- and D0 → K plus K-μ plus μ- Decays and Search for CP Violation
Calabrese, R;Capriotti, L;Couturier, B;Fiorini, M;Franzoso, E;Giugliano, C;Guarise, M;Kotriakhova, S;Luppi, E;Okamura, S;Pappalardo, LL;Passalacqua, B;Tomassetti, L;
2022
Abstract
The first full angular analysis and an updated measurement of the decay-rate CP asymmetry of the D0 →p+p-µ+µ- and D0 → K+KK+K-µ+µ- decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. The dataset corresponds to an integrated luminosity of 9 fb-1. The full set of CP -averaged angular observables and their CP asymmetries are measured as a function of the dimuon invariant mass. The results are consistent with expectations from the standard model and with CP symmetry.File in questo prodotto:
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PhysRevLett.128.221801.pdf
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