Nonfactorizable contributions to the decay mode D-0 -> K-0(K)over-bar(0) -art. no. 034010

Citation
Jo. Eeg et al., Nonfactorizable contributions to the decay mode D-0 -> K-0(K)over-bar(0) -art. no. 034010, PHYS REV D, 6403(3), 2001, pp. 4010
Citations number
51
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6403
Issue
3
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010801)6403:3<4010:NCTTDM>2.0.ZU;2-I
Abstract
We point out that the decay mode D-o-->K-o(K) over bar (o) has no factoriza ble contribution. In chiral perturbation language, treating D-o as heavy, t he O(p) contribution is zero. We calculate the nonfactorizable chiral loop contributions of order O(p(3)). Then, we use a heavy-light type chiral quar k model to calculate nonfactorizable tree level terms, also of order O(p(3) ), proportional to the gluon condensate. A priori, chiral loops are not exp ected to give good precision because the energy release in this decay is al most 800 MeV. Still, we find that both the chiral loops and the gluon conde nsate contributions are of the same order of magnitude as the experimental amplitude.