We study initial-state radiation events, e+e- â†'ÎISRÏ€+Ï€-J/Ï, with data collected with the BABAR detector. We observe an accumulation of events near 4.26GeV/c2 in the invariant-mass spectrum of Ï€+Ï€-J/Ï. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90MeV/c2, depending on the fit hypothesis.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Observation of a broad structure in the n+n-J/ψ mass spectrum around 4.26GeV/c2. PHYSICAL REVIEW LETTERS, 95(14) [10.1103/PhysRevLett.95.142001].

Observation of a broad structure in the n+n-J/ψ mass spectrum around 4.26GeV/c2

CARPINELLI, Massimo;
2005

Abstract

We study initial-state radiation events, e+e- â†'ÎISRÏ€+Ï€-J/Ï, with data collected with the BABAR detector. We observe an accumulation of events near 4.26GeV/c2 in the invariant-mass spectrum of Ï€+Ï€-J/Ï. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90MeV/c2, depending on the fit hypothesis.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2005
95
14
142001
reserved
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Observation of a broad structure in the n+n-J/ψ mass spectrum around 4.26GeV/c2. PHYSICAL REVIEW LETTERS, 95(14) [10.1103/PhysRevLett.95.142001].
File in questo prodotto:
File Dimensione Formato  
Aubert-2005-Phys Rev Lett-VoR.pdf

Solo gestori archivio

Descrizione: Article
Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Tutti i diritti riservati
Dimensione 209.62 kB
Formato Adobe PDF
209.62 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/10281/389814
Citazioni
  • Scopus 879
  • ???jsp.display-item.citation.isi??? 21
Social impact