Soft gluons and superleading logarithms in QCD

J. R. Forshaw; M. H. Seymour

doi:10.1016/j.nuclphysbps.2009.03.133

Soft gluons and superleading logarithms in QCD

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

After a brief introduction to the physics of soft gluons in QCD we present a surprising prediction. Dijet production in hadron-hadron collisions provides the paradigm, i.e. h1 + h1 → j j + X. In particular, we look at the case where there is a restriction placed on the emission of any further jets in the region in between the primary (highest pT) dijets. Logarithms in the ratio of the jet scale to the veto scale can be summed to all orders in the strong coupling. Surprisingly, factorization of collinear emissions fails at scales above the veto scale and triggers the appearance of double logarithms in the hard sub-process. The effect appears first at fourth order relative to the leading order prediction and is subleading in the number of colours. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Title of host publication	Nuclear Physics B - Proceedings Supplements\|Nucl. Phys. B Proc. Suppl.
Pages	257-267
Number of pages	10
Volume	191
DOIs	https://doi.org/10.1016/j.nuclphysbps.2009.03.133
Publication status	Published - Jun 2009
Event	Ringberg Workshop on New Trends in HERA Physics 2008 - Ringberg Castle, Tegernsee, Germany Duration: 5 Oct 2008 → 10 Oct 2008

Conference

Conference	Ringberg Workshop on New Trends in HERA Physics 2008
City	Ringberg Castle, Tegernsee, Germany
Period	5/10/08 → 10/10/08

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10.1016/j.nuclphysbps.2009.03.133

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title = "Soft gluons and superleading logarithms in QCD",

abstract = "After a brief introduction to the physics of soft gluons in QCD we present a surprising prediction. Dijet production in hadron-hadron collisions provides the paradigm, i.e. h1 + h1 → j j + X. In particular, we look at the case where there is a restriction placed on the emission of any further jets in the region in between the primary (highest pT) dijets. Logarithms in the ratio of the jet scale to the veto scale can be summed to all orders in the strong coupling. Surprisingly, factorization of collinear emissions fails at scales above the veto scale and triggers the appearance of double logarithms in the hard sub-process. The effect appears first at fourth order relative to the leading order prediction and is subleading in the number of colours. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

author = "Forshaw, {J. R.} and Seymour, {M. H.}",

year = "2009",

month = jun,

doi = "10.1016/j.nuclphysbps.2009.03.133",

language = "English",

volume = "191",

pages = "257--267",

booktitle = "Nuclear Physics B - Proceedings Supplements|Nucl. Phys. B Proc. Suppl.",

note = "Ringberg Workshop on New Trends in HERA Physics 2008 ; Conference date: 05-10-2008 Through 10-10-2008",

}

TY - GEN

T1 - Soft gluons and superleading logarithms in QCD

AU - Forshaw, J. R.

AU - Seymour, M. H.

PY - 2009/6

Y1 - 2009/6

N2 - After a brief introduction to the physics of soft gluons in QCD we present a surprising prediction. Dijet production in hadron-hadron collisions provides the paradigm, i.e. h1 + h1 → j j + X. In particular, we look at the case where there is a restriction placed on the emission of any further jets in the region in between the primary (highest pT) dijets. Logarithms in the ratio of the jet scale to the veto scale can be summed to all orders in the strong coupling. Surprisingly, factorization of collinear emissions fails at scales above the veto scale and triggers the appearance of double logarithms in the hard sub-process. The effect appears first at fourth order relative to the leading order prediction and is subleading in the number of colours. © 2009 Elsevier B.V. All rights reserved.

AB - After a brief introduction to the physics of soft gluons in QCD we present a surprising prediction. Dijet production in hadron-hadron collisions provides the paradigm, i.e. h1 + h1 → j j + X. In particular, we look at the case where there is a restriction placed on the emission of any further jets in the region in between the primary (highest pT) dijets. Logarithms in the ratio of the jet scale to the veto scale can be summed to all orders in the strong coupling. Surprisingly, factorization of collinear emissions fails at scales above the veto scale and triggers the appearance of double logarithms in the hard sub-process. The effect appears first at fourth order relative to the leading order prediction and is subleading in the number of colours. © 2009 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.nuclphysbps.2009.03.133

DO - 10.1016/j.nuclphysbps.2009.03.133

M3 - Conference contribution

VL - 191

SP - 257

EP - 267

BT - Nuclear Physics B - Proceedings Supplements|Nucl. Phys. B Proc. Suppl.

T2 - Ringberg Workshop on New Trends in HERA Physics 2008

Y2 - 5 October 2008 through 10 October 2008

ER -

Soft gluons and superleading logarithms in QCD

Abstract

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