A search for CP violation in D0 → K0S K+ π− and D0 → K0S K− π+ decays is reported. The search is performed using an unbinned model-independent method known as the energy test that probes local CP violation in the phase space of the decays. The data analysed correspond to an integrated luminosity of 5.4 fb^−1 collected in proton-proton collisions by the LHCb experiment at a centre-of-mass energy of √s = 13 TeV, amounting to approximately 950 thousand and 620 thousand signal candidates for the D0 → K0S K− π+ and D0 → K0S K+ π− modes, respectively. The method is validated using D0 → K− π+ π− π+ and D0 → K0S π+ π− decays, where CP-violating effects are expected to be negligible, and using background-enhanced regions of the signal decays. The results are consistent with CP symmetry in both the D0 → K0S K− π+ and the D0 → K0S K+ π− decays, with p-values for the hypothesis of no CP violation of 70% and 66%, respectively.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Search for CP violation in the phase space of D0 → K0S K± π∓ decays with the energy test. JOURNAL OF HIGH ENERGY PHYSICS, 2024(3), 0-19 [10.1007/jhep03(2024)107].

Search for CP violation in the phase space of D0 → K0S K± π∓ decays with the energy test

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

A search for CP violation in D0 → K0S K+ π− and D0 → K0S K− π+ decays is reported. The search is performed using an unbinned model-independent method known as the energy test that probes local CP violation in the phase space of the decays. The data analysed correspond to an integrated luminosity of 5.4 fb^−1 collected in proton-proton collisions by the LHCb experiment at a centre-of-mass energy of √s = 13 TeV, amounting to approximately 950 thousand and 620 thousand signal candidates for the D0 → K0S K− π+ and D0 → K0S K+ π− modes, respectively. The method is validated using D0 → K− π+ π− π+ and D0 → K0S π+ π− decays, where CP-violating effects are expected to be negligible, and using background-enhanced regions of the signal decays. The results are consistent with CP symmetry in both the D0 → K0S K− π+ and the D0 → K0S K+ π− decays, with p-values for the hypothesis of no CP violation of 70% and 66%, respectively.
2024
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Search for CP violation in the phase space of D0 → K0S K± π∓ decays with the energy test. JOURNAL OF HIGH ENERGY PHYSICS, 2024(3), 0-19 [10.1007/jhep03(2024)107].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1005570
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