A search for charge-parity (CP) violation in Cabibbo-suppressed Ds+ → K0S π+, D+ → K0S K+, and D+ → φ π+ 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 are A_CP(Ds+ → K0S π+) = (1.3 ± 1.9 ± 0.5) × 10^−3, A_CP(D+ → K0S K+) = (−0.09 ± 0.65 ± 0.48) × 10^−3, A_CP(D+ → φ π+) = (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., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Search for CP Violation in Ds+ → K0S π+, D+ → K0S K+, and D+ → φ π+ Decays. PHYSICAL REVIEW LETTERS, 122(19), 1-11 [10.1103/PhysRevLett.122.191803].

Search for CP Violation in Ds+ → K0S π+, D+ → K0S K+, and D+ → φ π+ Decays

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2019

Abstract

A search for charge-parity (CP) violation in Cabibbo-suppressed Ds+ → K0S π+, D+ → K0S K+, and D+ → φ π+ 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 are A_CP(Ds+ → K0S π+) = (1.3 ± 1.9 ± 0.5) × 10^−3, A_CP(D+ → K0S K+) = (−0.09 ± 0.65 ± 0.48) × 10^−3, A_CP(D+ → φ π+) = (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.
2019
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). Search for CP Violation in Ds+ → K0S π+, D+ → K0S K+, and D+ → φ π+ Decays. PHYSICAL REVIEW LETTERS, 122(19), 1-11 [10.1103/PhysRevLett.122.191803].
Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/688229
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