Nonresonant explanation for the Y(4260) structure observed in the e{sup +}e{sup -}{yields}J/{psi}{pi}{sup +}{pi}{sup -} process

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.054021· OSTI ID:21578197

Dianyong, Chen; Jun, He ^[1]; Xiang, Liu ^[1]

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1. Research Center for Hadron and CSR Physics of Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000 (China)

In this work, we propose a nonresonant explanation for the Y(4260) structure observed in the e{sup +}e{sup -}{yields}J/{psi}{pi}{sup +}{pi}{sup -} process, i.e., Y(4260) is not a genuine resonance. Our result indicates that the Y(4260) structure can be reproduced by the interference of production amplitudes of the e{sup +}e{sup -}{yields}J/{psi}{pi}{sup +}{pi}{sup -} processes via direct e{sup +}e{sup -} annihilation and through intermediate charmonia {psi}(4160)/{psi}(4415). Besides describing the Y(4260) line shape in e{sup +}e{sup -}{yields}J/{psi}{pi}{sup +}{pi}{sup -} well, such a nonresonant explanation for the Y(4260) structure naturally answers why there is no evidence of Y(4260) in the exclusive open-charm decay channel and R-value scan.

• OSTI ID: 21578197
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.054021; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANNIHILATION
ELECTRONS
PARTICLE DECAY
PIONS MINUS
POSITRONS
PSI-4160 MESONS
PSI-4415 MESONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
CHARMONIUM
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
LEPTONS
MATTER
MESONS
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
QUARKONIUM
VECTOR MESONS