A search for charge-parity (CP) violation in Cabibbo-suppressed Ds+→KS0π+, D+→KS0K+, and D+→φπ+ decays is reported using proton-proton collision data, corresponding to an integrated luminosity of 3.8 fb-1, collected at a center-of-mass energy of 13 TeV with the LHCb detector. High-yield samples of kinematically and topologically similar Cabibbo-favored D(s)+ decays are analyzed to subtract nuisance asymmetries due to production and detection effects, including those induced by CP violation in the neutral kaon system. The results areACP(Ds+→KS0π+)=(1.3±1.9±0.5)×10-3,ACP(D+→KS0K+)=(-0.09±0.65±0.48)×10-3,ACP(D+→φπ+)=(0.05±0.42±0.29)×10-3,where the first uncertainties are statistical and the second systematic. They are the most precise measurements of these quantities to date, and are consistent with CP symmetry. A combination with previous LHCb measurements, based on data collected at 7 and 8 TeV, is also reported.

Aaij, R., AbellA¡n Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Search for CP Violation in Ds+ → KS0 π+, D+ → KS0 K+, and D+ →φπ+ Decays. PHYSICAL REVIEW LETTERS, 122(19) [10.1103/PhysRevLett.122.191803].

Search for CP Violation in Ds+ → KS0 π+, D+ → KS0 K+, and D+ →φπ+ Decays

Belloli N.;Borsato M.;Calvi M.;Carniti P.;Fazzini D.;Gotti C.;Martinelli M.;Petruzzo M.;
2019

Abstract

A search for charge-parity (CP) violation in Cabibbo-suppressed Ds+→KS0π+, D+→KS0K+, and D+→φπ+ decays is reported using proton-proton collision data, corresponding to an integrated luminosity of 3.8 fb-1, collected at a center-of-mass energy of 13 TeV with the LHCb detector. High-yield samples of kinematically and topologically similar Cabibbo-favored D(s)+ decays are analyzed to subtract nuisance asymmetries due to production and detection effects, including those induced by CP violation in the neutral kaon system. The results areACP(Ds+→KS0π+)=(1.3±1.9±0.5)×10-3,ACP(D+→KS0K+)=(-0.09±0.65±0.48)×10-3,ACP(D+→φπ+)=(0.05±0.42±0.29)×10-3,where the first uncertainties are statistical and the second systematic. They are the most precise measurements of these quantities to date, and are consistent with CP symmetry. A combination with previous LHCb measurements, based on data collected at 7 and 8 TeV, is also reported.
Articolo in rivista - Articolo scientifico
CP Violation; Ds+; D+
English
2019
122
19
191803
none
Aaij, R., AbellA¡n Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Search for CP Violation in Ds+ → KS0 π+, D+ → KS0 K+, and D+ →φπ+ Decays. PHYSICAL REVIEW LETTERS, 122(19) [10.1103/PhysRevLett.122.191803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/242931
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