Searches for CP violation in the decays D(s)+ → η π+ and D(s)+ → η' π+ are performed using pp collision data corresponding to 6 fb^−1 of integrated luminosity collected by the LHCb experiment. The calibration channels D(s)+ → φ π+ are used to remove production and detection asymmetries. The resulting CP-violating asymmetries are A^CP(D+ → η π+) = (0.34 ± 0.66 ± 0.16 ± 0.05)%, A^CP(Ds+ → η π+) = (0.32 ± 0.51 ± 0.12)%, A^CP(D+ → η′ π+) = (0.49 ± 0.18 ± 0.06 ± 0.05)%, A^CP(Ds+ → η′ π+) = (0.01 ± 0.12 ± 0.08)%, where the first uncertainty is statistical, the second is systematic and the third, relevant for the D+ channels, is due to the uncertainty on A^CP(D+ → φ π+). These measurements, currently the most precise for three of the four channels considered, are consistent with the absence of CP violation. A combination of these results with previous LHCb measurements is presented.

Aaij R., Abdelmotteleb A.S.W., Abellan Beteta C., Abudinen F., Ackernley T., Adeva B., et al. (2023). Measurement of CP asymmetries in D(s)+ → η π+ and D(s)+ → η′ π+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2023(4), 0-22 [10.1007/JHEP04(2023)081].

Measurement of CP asymmetries in D(s)+ → η π+ and D(s)+ → η′ π+ decays

Carbone A.;Ferrari F.;Galli D.;Manuzzi D.;Patrignani C.;Villa A.;Zucchelli S.;
2023

Abstract

Searches for CP violation in the decays D(s)+ → η π+ and D(s)+ → η' π+ are performed using pp collision data corresponding to 6 fb^−1 of integrated luminosity collected by the LHCb experiment. The calibration channels D(s)+ → φ π+ are used to remove production and detection asymmetries. The resulting CP-violating asymmetries are A^CP(D+ → η π+) = (0.34 ± 0.66 ± 0.16 ± 0.05)%, A^CP(Ds+ → η π+) = (0.32 ± 0.51 ± 0.12)%, A^CP(D+ → η′ π+) = (0.49 ± 0.18 ± 0.06 ± 0.05)%, A^CP(Ds+ → η′ π+) = (0.01 ± 0.12 ± 0.08)%, where the first uncertainty is statistical, the second is systematic and the third, relevant for the D+ channels, is due to the uncertainty on A^CP(D+ → φ π+). These measurements, currently the most precise for three of the four channels considered, are consistent with the absence of CP violation. A combination of these results with previous LHCb measurements is presented.
2023
Aaij R., Abdelmotteleb A.S.W., Abellan Beteta C., Abudinen F., Ackernley T., Adeva B., et al. (2023). Measurement of CP asymmetries in D(s)+ → η π+ and D(s)+ → η′ π+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2023(4), 0-22 [10.1007/JHEP04(2023)081].
Aaij R.; Abdelmotteleb A.S.W.; Abellan Beteta C.; Abudinen F.; Ackernley T.; Adeva B.; Adinolfi M.; Afsharnia H.; Agapopoulou C.; Aidala C.A.; Aiola S...espandi
File in questo prodotto:
File Dimensione Formato  
2023-AR-01-Meas_of_CP_Asymm_in_Dsp_to_eta_pip_and_Dsp_to_etap_pip-JHEP.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 977.58 kB
Formato Adobe PDF
977.58 kB Adobe PDF Visualizza/Apri

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/11585/951531
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact