The rule of discarding 1/ Nc in inclusive weak decays (I)
Abstract
We continue to investigate the effects of the (dominant) subleading operator of the σH type in the 1/ Nc parts of the weak nonleptonic amplitudes. If the previous work concentrated on exclusive decays now we analyse inclusive widths in a certain kinematic limit. Deviations from the parton model predictions are found due to soft-gluon color exchange. In the interference (i.e. 1/ Nc) terms they are stronger than in the non-interferene terms. The sign is negative so that the 1/ Nc parts tend to cancel. The absolute value of the effect is of order 1 in D-mesons and of order 0.25 in B-mesons.
- Publication:
-
Nuclear Physics B
- Pub Date:
- July 1993
- DOI:
- 10.1016/0550-3213(93)90504-I
- arXiv:
- arXiv:hep-ph/9207236
- Bibcode:
- 1993NuPhB.399..441B
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- preprint NSF-ITP-92-103,TPI-MINN-33/T, 27 pages +2 fig. we eliminate several minor misprints