## Abstract

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^{2}_{c}) arise from an external gluon attached to a charm quark loop and can be expressed in terms of the chromomagnetic interaction of the b quark inside the B meson. This is also true at leading order in the HQEFT approach. However the structure of higher-dimensional operators is different because the effects of external gluons alone do not give a complete set of operators. A systematic method to derive all the high-dimensional operators can be obtained in the HQEFT scheme using the operator product expansion.

Original language | English |
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Pages (from-to) | 165-170 |

Number of pages | 6 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 439 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - 1998 Oct 29 |

## Keywords

- Heavy quark effective theory
- Nonperturbative effects
- Operator product expansion

## ASJC Scopus subject areas

- Nuclear and High Energy Physics

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