A search for CP violation in D0->KS0K+pi- and D0->KS0K-pi+ 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->KS0K-pi+ and D0->KS0K+pi- modes, respectively. The method is validated using D0 -> K-pi+pi-pi+ and D0->KS0pi+pi- 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->KS0K-pi+ and the D0->KS0K+pi- decays, with p-values for the hypothesis of no CP violation of 70% and 66%, respectively.

Search for CP violation in the phase space of D0->KS0K\pm\pi\mp decays with the energy test

Bassi G.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Passaro D.
Membro del Collaboration Group
;
Pica L.
Membro del Collaboration Group
;
Ribatti R.
Membro del Collaboration Group
;
Riccardi D.
Membro del Collaboration Group
;
2024

Abstract

A search for CP violation in D0->KS0K+pi- and D0->KS0K-pi+ 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->KS0K-pi+ and D0->KS0K+pi- modes, respectively. The method is validated using D0 -> K-pi+pi-pi+ and D0->KS0pi+pi- 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->KS0K-pi+ and the D0->KS0K+pi- decays, with p-values for the hypothesis of no CP violation of 70% and 66%, respectively.
2024
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
Charm Physics; CP Violation; Hadron-Hadron Scattering
File in questo prodotto:
File Dimensione Formato  
JHEP03(2024)107.pdf

accesso aperto

Tipologia: Published version
Licenza: Creative Commons
Dimensione 1.33 MB
Formato Adobe PDF
1.33 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/156504
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 1
  • OpenAlex 1
social impact