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On the breaking of collinear factorization in QCD

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Abstract

We investigate the breakdown of collinear factorization for non-inclusive observables in hadron-hadron collisions. For pure QCD processes, factorization is violated at the three-loop level and it has a structure identical to that encountered previously in the case of super-leading logarithms. In particular, it is driven by the non-commutation of Coulomb/Glauber gluon exchanges with other soft exchanges. Beyond QCD, factorization may be violated at the two-loop level provided that the hard subprocess contains matrix element contributions with phase differences between different colour topologies.

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Authors and Affiliations

  1. Consortium for Fundamental Physics, School of Physics & Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.

    Jeffrey R. Forshaw, Michael H. Seymour & Andrzej Siódmok

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  1. Jeffrey R. Forshaw
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  2. Michael H. Seymour
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  3. Andrzej Siódmok
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Correspondence to Michael H. Seymour.

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ArXiv ePrint: 1206.6363

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Forshaw, J.R., Seymour, M.H. & Siódmok, A. On the breaking of collinear factorization in QCD. J. High Energ. Phys. 2012, 66 (2012). https://doi.org/10.1007/JHEP11(2012)066

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  • DOI: https://doi.org/10.1007/JHEP11(2012)066

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