Lineshape of {psi}(3770) and low-lying vector charmonium resonance parameters in e{sup +}e{sup -{yields}}DD

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.034011· OSTI ID:21409166

Yuanjiang, Zhang ^[1]; Qiang, Zhao ^[1]

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1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)

We investigate the DD production in e{sup +}e{sup -} annihilations near threshold in an effective Lagrangian approach. This shows that the lineshape of the cross section near threshold is sensitive to the contributions from {psi}{sup '}, though it is below the DD threshold. The recent experimental data from the BES and Belle collaborations allow us to determine the {psi}{sup '}DD coupling constant, which appears to be consistent with other theoretical studies. As a consequence, the {psi}{sup '}-{psi}(3770) mixing parameter can be extracted around the {psi}(3770) mass region. Resonance parameters for {psi}(3770), X(3900), {psi}(4040), and {psi}(4160) are also investigated. The X(3900) appears as an enhancement at around 3.9 GeV in the Belle data. In addition to treating it as a resonance, we also study the mechanism through which the enhancement is produced by the DD*+c.c. open channel effects. Our result shows that such a possibility cannot be eliminated.

• OSTI ID: 21409166
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.034011; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
COUPLING CONSTANTS
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE 01-10
LAGRANGIAN FUNCTION
MASS
MIXING
PSI-3770 MESONS
PSI-4040 MESONS
PSI-4160 MESONS
RESONANCE
BOSONS
CHARMONIUM
ELEMENTARY PARTICLES
ENERGY RANGE
FUNCTIONS
GEV RANGE
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
QUARKONIUM
VECTOR MESONS