### 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 |
---|---|

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 |

Publication status | Published - 1998 Oct 29 |

### Fingerprint

### Keywords

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

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

**Nonperturbative O(m ^{-2}
_{c}) effects in B → X_{s}γ from heavy quark effective theory.** / Chay, Junegone.

Research output: Contribution to journal › Article

^{-2}

_{c}) effects in B → X

_{s}γ from heavy quark effective theory',

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*, vol. 439, no. 1-2, pp. 165-170.

}

TY - JOUR

T1 - Nonperturbative O(m-2 c) effects in B → Xsγ from heavy quark effective theory

AU - Chay, Junegone

PY - 1998/10/29

Y1 - 1998/10/29

N2 - The nonperturbative contribution, suppressed by powers of the charm quark mass mc, in the inclusive decay B → Xsγ is analyzed in the context of heavy quark effective field theory (HQEFT). According to previous analyses, the leading effects of O(1/m2 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.

AB - The nonperturbative contribution, suppressed by powers of the charm quark mass mc, in the inclusive decay B → Xsγ is analyzed in the context of heavy quark effective field theory (HQEFT). According to previous analyses, the leading effects of O(1/m2 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.

KW - Heavy quark effective theory

KW - Nonperturbative effects

KW - Operator product expansion

UR - http://www.scopus.com/inward/record.url?scp=0347024585&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0347024585&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0347024585

VL - 439

SP - 165

EP - 170

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

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

SN - 0370-2693

IS - 1-2

ER -