2020
DOI: 10.1103/physrevd.101.054006
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Pathologies of the Kimber-Martin-Ryskin prescriptions for unintegrated PDFs: Which prescription should be preferred?

Abstract: We discuss the different Kimber-Martin-Ryskin (KMR) prescriptions for unintegrated parton distribution functions (uPDFs). We show that the strong-ordering (SO) and the angular-ordering (AO) cut-offs lead to strong discrepancies between the obtained cross sections. While the result obtained with the AO cut-off overestimates the heavy-flavor cross section by about a factor 3, the SO cut-off gives the correct answer. We also solve the issue of the KMR uPDFs definitions mentioned in [1], and show that, in the case… Show more

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Cited by 25 publications
(40 citation statements)
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“…On the other hand, the Ref. [20] contradicts the above idea [19] and claims that there is no need for the cutoff-dependent PDFs, if one introduces another term to the D-MRW UPDF.…”
Section: Introductionmentioning
confidence: 94%
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“…On the other hand, the Ref. [20] contradicts the above idea [19] and claims that there is no need for the cutoff-dependent PDFs, if one introduces another term to the D-MRW UPDF.…”
Section: Introductionmentioning
confidence: 94%
“…[19] that the UPDF model adopted in this reference is in fact the KMR model, in which the author of Ref. [20] not correctly refers to it as the MRW UPDF. Also, we should point out that the same author uses the strong ordering cutoff along with the hard constraint (μ − k t ), to limit the parton transverse momentum to the k t ≤ μ.…”
Section: Integral and Differential Forms Of The Mrw Updfsmentioning
confidence: 99%
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“…However, some criticism of the MRW model was expressed very recently e.g., in Ref. [52]. It is also commonly questioned, whether the MRW model could be successfully used to describe DIS high-precision data [53].…”
Section: The K T -Factorization Scheme With the Kmr/mrw Updfmentioning
confidence: 99%