Instantons in lepton pair production

A. Brandenburg; A. Ringwald; A. Utermann

doi:10.1016/j.nuclphysb.2006.07.020

Instantons in lepton pair production

A. Brandenburg, A. Ringwald, A. Utermann

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Abstract

We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation-a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects. © 2006 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	107-126
Journal	Nuclear Physics B
Volume	754
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2006.07.020
Publication status	Published - 2006

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Instantons in lepton pair production

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10.1016/j.nuclphysb.2006.07.020

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title = "Instantons in lepton pair production",

abstract = "We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation-a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects. {\textcopyright} 2006 Elsevier B.V. All rights reserved.",

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T1 - Instantons in lepton pair production

AU - Brandenburg, A.

AU - Ringwald, A.

AU - Utermann, A.

N1 - Instantons in lepton pair production

PY - 2006

Y1 - 2006

N2 - We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation-a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects. © 2006 Elsevier B.V. All rights reserved.

AB - We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation-a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects. © 2006 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.nuclphysb.2006.07.020

DO - 10.1016/j.nuclphysb.2006.07.020

M3 - Article

SN - 0550-3213

VL - 754

SP - 107

EP - 126

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 1-2

ER -

Instantons in lepton pair production

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