The B+ → J/ψ η′ K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S) K+ decay and found to be B(B+ → J/ψ η′ K+)/B(B+ → ψ(2S) K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10^−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψ η′ mass distribution is performed and no signal of intermediate resonances is observed.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the B+ → J/ψ η′ K+ Decay. JOURNAL OF HIGH ENERGY PHYSICS, 2023(8), 0-26 [10.1007/jhep08(2023)174].

Observation of the B+ → J/ψ η′ K+ Decay

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

Abstract

The B+ → J/ψ η′ K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S) K+ decay and found to be B(B+ → J/ψ η′ K+)/B(B+ → ψ(2S) K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10^−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψ η′ mass distribution is performed and no signal of intermediate resonances is observed.
2023
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the B+ → J/ψ η′ K+ Decay. JOURNAL OF HIGH ENERGY PHYSICS, 2023(8), 0-26 [10.1007/jhep08(2023)174].
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-50-Obs_of_the_Bp_to_Jpsi_etap_Kp_Decay-JHEP.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 855.34 kB
Formato Adobe PDF
855.34 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/11585/953236
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact