Please use this identifier to cite or link to this item:
Title: Observation of a Broad Structure in the π+π−J/ψ Mass Spectrum around 4.26 GeV/c2
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 28-Sep-2005
Publisher: American Physical Society
Abstract: We study initial-state radiation events, e + e − → γ ISR π + π − J / ψ , with data collected with the BABAR detector. We observe an accumulation of events near 4.26     GeV / c 2 in the invariant-mass spectrum of π + π − J / ψ . Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26     GeV / c 2 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 90     MeV / c 2 , depending on the fit hypothesis.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2005, vol. 95, num. 14, p. 142001
Related resource:
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
539060.pdf209.62 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.