Coupled-channel and screening effects in charmonium spectrum

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.014012· OSTI ID:21308518

Baiqing, Li ^[1]; Ce, Meng; Kuangta, Chao ^[1]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

Using the same quenched limit as input, we compare the charmonium spectra predicted by two different models, i.e., the coupled-channel model and the screened potential model in the mass region below 4 GeV, in which the contributions from decay channels involving P-wave (as well as even higher excited) D mesons can be neglected. We find that the two models have similar global features in describing the charmonium spectrum since they approximately embody the same effect of the vacuum polarization of dynamical light quark pairs. Adopting these models will be helpful to clarify the nature of the newly discovered charmonium or charmoniumlike states; and the coupled-channel model is more adept in investigating the influences of open-charm thresholds on the charmonium spectrum. In particular, we show the S-wave decay coupling effect on lowering the {chi}{sub c1}(2P) mass toward the DD* threshold, in support of the assignment of the X(3872) as a {chi}{sub c1}(2P)-dominated charmonium state.

• OSTI ID: 21308518
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARMONIUM
COMPARATIVE EVALUATIONS
COUPLED CHANNEL THEORY
COUPLING
D MESONS
D QUARKS
GEV RANGE 01-10
MASS
P WAVES
PARTICLE DECAY
POTENTIALS
S WAVES
SCREENING
SPECTRA
U QUARKS
VACUUM POLARIZATION