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| Dokumentenart: | Artikel |
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| Titel eines Journals oder einer Zeitschrift: | Physics Letters B |
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| Verlag: | ELSEVIER SCIENCE BV |
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| Ort der Veröffentlichung: | AMSTERDAM |
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| Band: | 655 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 1-2 |
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| Seitenbereich: | S. 26-31 |
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| Datum: | 2007 |
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| Institutionen: | Physik > Institut für Theoretische Physik |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1016/j.physletb.2007.08.081 | DOI |
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| Stichwörter / Keywords: | MASS SINGULARITIES; FINAL-STATES; SMALL-X; QCD; FACTORIZATION; SYSTEMS; LINES; |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 68782 |
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Zusammenfassung
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 ...
Zusammenfassung
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.
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