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Soft gluons and superleading logarithms in QCD
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. h_1 +h_2 \to jj+X. In particular, we look at the case where there is a restriction placed on the emission of any further jets i...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2009
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysbps.2009.03.133 http://cds.cern.ch/record/1156761 |
_version_ | 1780915754511630336 |
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author | Forshaw, J.R. Seymour, M.H. |
author_facet | Forshaw, J.R. Seymour, M.H. |
author_sort | Forshaw, J.R. |
collection | CERN |
description | 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. h_1 +h_2 \to jj+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 p_T) 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. |
id | cern-1156761 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2009 |
record_format | invenio |
spelling | cern-11567612023-03-14T19:01:04Zdoi:10.1016/j.nuclphysbps.2009.03.133http://cds.cern.ch/record/1156761engForshaw, J.R.Seymour, M.H.Soft gluons and superleading logarithms in QCDParticle Physics - PhenomenologyAfter 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. h_1 +h_2 \to jj+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 p_T) 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.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. h_1 +h_2 \to jj+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 p_T) 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.arXiv:0901.3037MAN-HEP-2009-3CERN-TH-2009-012MAN-HEP-2009-3CERN-PH-TH-2009-012oai:cds.cern.ch:11567612009-01-21 |
spellingShingle | Particle Physics - Phenomenology Forshaw, J.R. Seymour, M.H. Soft gluons and superleading logarithms in QCD |
title | Soft gluons and superleading logarithms in QCD |
title_full | Soft gluons and superleading logarithms in QCD |
title_fullStr | Soft gluons and superleading logarithms in QCD |
title_full_unstemmed | Soft gluons and superleading logarithms in QCD |
title_short | Soft gluons and superleading logarithms in QCD |
title_sort | soft gluons and superleading logarithms in qcd |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.nuclphysbps.2009.03.133 http://cds.cern.ch/record/1156761 |
work_keys_str_mv | AT forshawjr softgluonsandsuperleadinglogarithmsinqcd AT seymourmh softgluonsandsuperleadinglogarithmsinqcd |