Variable-flavor number scheme for next-to-next-to-leading order

By R. Thorne. 2006

133 citations recorded by the source corpus.

At NNLO it is particularly important to have a Variable-flavor Number Scheme (VFNS) to deal with heavy quarks because there are major problems with both the zero-mass variable-flavor number scheme and the fixed-flavor number scheme. I illustrate these problems and present a general formulation of a Variable-flavor Number Scheme (VFNS) for heavy quarks that is explicitly implemented up to NNLO in the strong coupling constant {alpha}{sub S}, and may be used in NNLO global fits for parton distributions. The procedure combines elements of the ACOT({chi}) scheme and the Thorne-Roberts scheme. Despite the fact that at NNLO the parton distributions are discontinuous as one changes the number of active quark flavors, all physical quantities are continuous at flavor transitions and the comparison with data is successful.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2101190ebf977b2894852ccfa47e1f69770d588c

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

The high energy neutrino cross-section in the Standard Model and its uncertainty (2011, methodology): “The PDFs considered here all account for the heavy quark production using general mass variable flavour number schemes, although the specific schemes differ: MSTW2008 and HERAPDF1.5 use the Thorne-Roberts scheme [32, 33 ], whereas CT10/CTEQ6.6 use the ACOT scheme [48].”