Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-10-04
AIP Conf.Proc. 619 (2002) 595-598
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 EPS figures, uses epsfig.sty, specialized style files included. Talk given at the 9th International Conference On H
Scientific paper
10.1063/1.1482498
The variational einbein field method is applied to the model of the QCD string with quarks at the ends for the case of light-light and heavy-light mesons. Special attention is payed to the proper string dynamics. The correct string slope of the Regge trajectories is reproduced for light-light states which comes out from the picture of rotating string. Masses of several low-lying orbitally and radially excited states in the D, D_s, B, and B_s meson spectra are calculated and a good agreement with the experimental data as well as with recent lattice calculations is found. The role of the string correction to the interquark interaction is discussed at the example of the identification of D*'(2637) state recently claimed by DELPHI Collaboration. For the heavy-light mesons the standard constants used in Heavy Quark Effective Theory are extracted and compared to the results of other approaches.
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