This paper reports the observation of the decays B0(s) → Ds1(2536)∓ K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The branching fractions of these decays are measured relative to the normalisation channel B0 → anti-D0 K+ K−. The Ds1(2536)− meson is reconstructed in the anti-D*(2007)0 K− decay channel and the products of branching fractions are measured to be B(B0s → Ds1(2536)∓ K±) × B(Ds1(2536)− → anti-D*(2007)0 K−) = (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10^−5, B(B0 → Ds1(2536)∓ K±) × B(Ds1(2536)− → anti-D*(2007)0 K−) = (0.510 ± 0.021 ± 0.036 ± 0.050) × 10^−5. The first uncertainty is statistical, the second systematic, and the third arises from the uncertainty of the branching fraction of the B0 → anti-D0 K+ K− normalisation channel. The last uncertainty in the B0s result is due to the limited knowledge of the fragmentation fraction ratio, f_s/f_d. The significance for the B0s and B0 signals is larger than 10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the Ds1(2536)− → anti-D*(2007)0 K− decay is determined from the data. The ratio of the S- and D-wave amplitudes is found to be 1.11 ± 0.15 ± 0.06 and the phase difference between them 0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the Decays B0(s) → Ds1(2536)∓ K±. JOURNAL OF HIGH ENERGY PHYSICS, 2023(10), 0-24 [10.1007/jhep10(2023)106].

Observation of the Decays B0(s) → Ds1(2536)∓ K±

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

Abstract

This paper reports the observation of the decays B0(s) → Ds1(2536)∓ K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The branching fractions of these decays are measured relative to the normalisation channel B0 → anti-D0 K+ K−. The Ds1(2536)− meson is reconstructed in the anti-D*(2007)0 K− decay channel and the products of branching fractions are measured to be B(B0s → Ds1(2536)∓ K±) × B(Ds1(2536)− → anti-D*(2007)0 K−) = (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10^−5, B(B0 → Ds1(2536)∓ K±) × B(Ds1(2536)− → anti-D*(2007)0 K−) = (0.510 ± 0.021 ± 0.036 ± 0.050) × 10^−5. The first uncertainty is statistical, the second systematic, and the third arises from the uncertainty of the branching fraction of the B0 → anti-D0 K+ K− normalisation channel. The last uncertainty in the B0s result is due to the limited knowledge of the fragmentation fraction ratio, f_s/f_d. The significance for the B0s and B0 signals is larger than 10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the Ds1(2536)− → anti-D*(2007)0 K− decay is determined from the data. The ratio of the S- and D-wave amplitudes is found to be 1.11 ± 0.15 ± 0.06 and the phase difference between them 0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic.
2023
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the Decays B0(s) → Ds1(2536)∓ K±. JOURNAL OF HIGH ENERGY PHYSICS, 2023(10), 0-24 [10.1007/jhep10(2023)106].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
File in questo prodotto:
File Dimensione Formato  
2023-AR-64-Obs_of_the_Dec_B0_s_to_Ds1_2536mp_Kpm-JHEP.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 1.02 MB
Formato Adobe PDF
1.02 MB 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/11585/953594
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 4
social impact