On the use of the KMR unintegrated parton distribution functions

Golec-Biernat, Krzysztof; Staśto, Anna M.

doi:10.1016/j.physletb.2018.04.061

Title: On the use of the KMR unintegrated parton distribution functions

Journal Article · 01 May 2018 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2018.04.061 · OSTI ID:1592498

Golec-Biernat, Krzysztof ^[1]; Staśto, Anna M. ^[2]

Polish Academy of Sciences (PAS), Krakow (Poland); Univ. of Rzeszów (Poland)
Pennsylvania State Univ., University Park, PA (United States)

We discuss the unintegrated parton distribution functions (UPDFs) introduced by Kimber, Martin and Ryskin (KMR), which are frequently used in phenomenological analyses of hard processes with transverse momenta of partons taken into account. We demonstrate numerically that the commonly used differential definition of the UPDFs leads to erroneous results for large transverse momenta. We identify the reason for that, being the use of the ordinary PDFs instead of the cutoff dependent distribution functions. We show that in phenomenological applications, the integral definition of the UPDFs with the ordinary PDFs can be used.

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Research Organization:: Pennsylvania State Univ., University Park, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0002145; SC-0002145

OSTI ID:: 1592498

Alternate ID(s):: OSTI ID: 1499268

Journal Information:: Physics Letters. B, Vol. 781, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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