Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.

Observation of J/psi -> p(p)over-bara(0)(980) at BESIII

BIANCHI, Fabrizio;DESTEFANIS, MARCO GIOVANNI;DE MORI, FRANCESCA;GRECO, Michela;HU, Jifeng;MAGGIORA, MARCO;MARCELLO, Simonetta;SPATARO, STEFANO GIOVANNI;
2014-01-01

Abstract

Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.
2014
90
052009-1
052009-8
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.052009
M. Ablikim;M. N. Achasov;X. C. Ai;O. Albayrak;M. Albrecht;D. J. Ambrose;F. F. An;Q. An;J. Z. Bai;R. Baldini Ferroli;Y. Ban;D. W. Bennett;J...espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevD.90.052009.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 311.65 kB
Formato Adobe PDF
311.65 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/2318/155090
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 7
social impact