π+π+π−-nonresonant decay in the effective quark model with chiral symmetry

The partial widths of the decays D s → φπ and D s → πππ-nonresonant are computed within the effective quark model with chiral symmetry involving Heavy quark effective theory (HQET) and Chiral perturbation theory at the quark level (CHPT)q with linear realization of chiral U(3) × U(3) symmetry. It is shown that for the explanation of the experimental probability of the D s → πππ– nonresonant decay one does not need to use unnaturally heavy light current quarks as has been suggested in Ref.[1]. PACS number(s): 13.30.Ce, 12.39.Ki, 14.20.Lq, 14.20.Mr E–mail: [email protected], Tel.: +43–1–58801–5598, Fax: +43–1–5864203 Permanent Address: State Technical University, Department of Theoretical Physics, 195251 St. Petersburg, Russian Federation