Observation of a Broad Structure in the $$\pi^+\pi^-J/\psi$$ Mass Spectrum around 4.26~GeV/$c^2$
Journal Article
·
· Physical Review Letters
The authors study initial-state radiation events, e{sup +}e{sup -} {yields} {gamma}{sub ISR} {pi}{sup +}{pi}{sup -} J/{psi}, with data collected with the BABAR detector. They observe an accumulation of events near 4.26 GeV/c{sup 2} in the invariant-mass spectrum of {pi}{sup +}{pi}{sup -} J/{psi}. Fits of the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c{sup 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{sup 2}, depending on the fit hypothesis.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 878863
- Report Number(s):
- SLAC-PUB-11320; PRLTAO; hep-ex/0506081; TRN: US0602500
- Journal Information:
- Physical Review Letters, Vol. 95; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observation of a Broad Structure in the {pi}{sup +}{pi}{sup -}J/{psi} Mass Spectrum around 4.26 GeV/c{sup 2}
Study of the pi+pi-J//psi Mass Spectrum Via Initial State Radiation at BaBar
Observation of a Broad 1{sup --} Resonant Structure around 1.5 GeV/c{sup 2} in the K{sup +}K{sup -} Mass Spectrum in J/{psi}{yields}K{sup +}K{sup -}{pi}{sup 0}
Journal Article
·
Fri Sep 30 00:00:00 EDT 2005
· Physical Review Letters
·
OSTI ID:878863
+17 more
Study of the pi+pi-J//psi Mass Spectrum Via Initial State Radiation at BaBar
Conference
·
Fri Aug 15 00:00:00 EDT 2008
·
OSTI ID:878863
Observation of a Broad 1{sup --} Resonant Structure around 1.5 GeV/c{sup 2} in the K{sup +}K{sup -} Mass Spectrum in J/{psi}{yields}K{sup +}K{sup -}{pi}{sup 0}
Journal Article
·
Fri Oct 06 00:00:00 EDT 2006
· Physical Review Letters
·
OSTI ID:878863
+17 more