### Abstract

We compute power corrections to mean values of hadronic event shapes - the thrust and the C parameter - of tagged b quark events in electron positron annihilation, using the dispersive approach. We find that the leading power corrections are of the same type of 1/Q corrections as for event shapes in the massless case, with the same non-perturbative coefficient times a perturbatively calculable mass-dependent coefficient. The effect of the mass correction in the power correction is to reduce the latter by 10-30% for tagged b events, for centre-of-mass energies ranging from the Z ^{0} peak down to 20 GeV.

Original language | English |
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Pages (from-to) | 1-15 |

Number of pages | 15 |

Journal | Journal of High Energy Physics |

Volume | 4 |

Issue number | 1 |

Publication status | Published - 2000 |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

**Calculation of power corrections to hadronic event shapes of tagged b events.** / Trócsányi, Z.

Research output: Article

*Journal of High Energy Physics*, vol. 4, no. 1, pp. 1-15.

}

TY - JOUR

T1 - Calculation of power corrections to hadronic event shapes of tagged b events

AU - Trócsányi, Z.

PY - 2000

Y1 - 2000

N2 - We compute power corrections to mean values of hadronic event shapes - the thrust and the C parameter - of tagged b quark events in electron positron annihilation, using the dispersive approach. We find that the leading power corrections are of the same type of 1/Q corrections as for event shapes in the massless case, with the same non-perturbative coefficient times a perturbatively calculable mass-dependent coefficient. The effect of the mass correction in the power correction is to reduce the latter by 10-30% for tagged b events, for centre-of-mass energies ranging from the Z 0 peak down to 20 GeV.

AB - We compute power corrections to mean values of hadronic event shapes - the thrust and the C parameter - of tagged b quark events in electron positron annihilation, using the dispersive approach. We find that the leading power corrections are of the same type of 1/Q corrections as for event shapes in the massless case, with the same non-perturbative coefficient times a perturbatively calculable mass-dependent coefficient. The effect of the mass correction in the power correction is to reduce the latter by 10-30% for tagged b events, for centre-of-mass energies ranging from the Z 0 peak down to 20 GeV.

KW - Jets

KW - LEP HERA and SLC Physics

KW - NLO Computations

KW - QCD

UR - http://www.scopus.com/inward/record.url?scp=7444245774&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=7444245774&partnerID=8YFLogxK

M3 - Article

VL - 4

SP - 1

EP - 15

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 1

ER -