Energy flow in QCD and event shape functions

A. V. Belitsky; G. P. Korchemsky; G. Sterman

doi:10.1016/S0370-2693(01)00899-1

Energy flow in QCD and event shape functions

A. V. Belitsky, G. P. Korchemsky, G. Sterman

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e⁺e^- annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions.

Original language	English (US)
Pages (from-to)	297-307
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	515
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(01)00899-1
State	Published - Aug 30 2001
Externally published	Yes

Keywords

Event shape distributions
Hadronization
QCD jets

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(01)00899-1

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@article{50512730ec5a4283ae49d5723a7181ed,

title = "Energy flow in QCD and event shape functions",

abstract = "Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e+e- annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions.",

keywords = "Event shape distributions, Hadronization, QCD jets",

author = "Belitsky, {A. V.} and Korchemsky, {G. P.} and G. Sterman",

note = "Funding Information: We are most grateful to Yu. Dokshitzer and A. Kaidalov for interesting discussions. A.B. is grateful to D. Schiff for the hospitality extended to him at the Laboratoire de Physique Th{\'e}orique in Orsay. G.S. would like to thank Brookhaven National Laboratory for its hospitality. The work of A.B. and G.S. was supported in part by the National Science Foundation, grant PHY9722101. The work of G.K. was supported in part by the EU network {\textquoteleft}Training and Mobility of Researchers{\textquoteright}, contract FMRX-CT98-0194.",

year = "2001",

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doi = "10.1016/S0370-2693(01)00899-1",

language = "English (US)",

volume = "515",

pages = "297--307",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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number = "3-4",

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TY - JOUR

T1 - Energy flow in QCD and event shape functions

AU - Belitsky, A. V.

AU - Korchemsky, G. P.

AU - Sterman, G.

N1 - Funding Information: We are most grateful to Yu. Dokshitzer and A. Kaidalov for interesting discussions. A.B. is grateful to D. Schiff for the hospitality extended to him at the Laboratoire de Physique Théorique in Orsay. G.S. would like to thank Brookhaven National Laboratory for its hospitality. The work of A.B. and G.S. was supported in part by the National Science Foundation, grant PHY9722101. The work of G.K. was supported in part by the EU network ‘Training and Mobility of Researchers’, contract FMRX-CT98-0194.

PY - 2001/8/30

Y1 - 2001/8/30

N2 - Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e+e- annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions.

AB - Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e+e- annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions.

KW - Event shape distributions

KW - Hadronization

KW - QCD jets

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UR - http://www.scopus.com/inward/citedby.url?scp=0035974937&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(01)00899-1

DO - 10.1016/S0370-2693(01)00899-1

M3 - Article

AN - SCOPUS:0035974937

SN - 0370-2693

VL - 515

SP - 297

EP - 307

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

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

IS - 3-4

ER -

Energy flow in QCD and event shape functions

Abstract

Keywords

ASJC Scopus subject areas

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