Hautmann, F. (2007) Endpoint singularities in unintegrated parton distributions. PHYSICS LETTERS B, 655 (1-2). pp. 26-31. ISSN 0370-2693,
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We examine the singular behavior from the endpoint region x -> 1 in parton distributions unintegrated in both longitudinal and transverse momenta. We identify and regularize the singularities by using the subtraction method, and compare this with the cut-off regularization method. The counterterms for the distributions with subtractive regularization are given in coordinate space by compact all-order expressions in terms of eikonal-line operators: We carry out an explicit calculation at one loop for the unintegrated quark distribution. We discuss the relation of the unintegrated parton distributions in subtractive regularization with the ordinary parton distributions. (c) 2007 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MASS SINGULARITIES; FINAL-STATES; SMALL-X; QCD; FACTORIZATION; SYSTEMS; LINES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2020 12:55 |
| Last Modified: | 01 Dec 2020 12:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32062 |
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