Nonperturbative O( mc−2) effects in B→ Xsγ from heavy quark effective theory

• Published in: Physics letters. B Vol. 439; no. 1; pp. 165 - 170
• Main Author: Chay, Junegone
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 29.10.1998
• Subjects: Heavy quark effective theory; Nonperturbative effects; Operator product expansion; Heavy quark effective theory; Nonperturbative effects; Operator product expansion

The nonperturbative contribution, suppressed by powers of the charm quark mass m c , in the inclusive decay B→ X s γ is analyzed in the context of heavy quark effective field theory (HQEFT). According to previous analyses, the leading effects of O(1/ m c 2) arise from an external gluon attached to a...