Hybrid scheme for heavy flavors: Merging the fixed flavor number scheme and variable flavor number scheme - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review D Year : 2013

Hybrid scheme for heavy flavors: Merging the fixed flavor number scheme and variable flavor number scheme

A. Kusina
  • Function : Author
F.I. Olness
  • Function : Author
T. Jezo
  • Function : Author
K. Kovarik
  • Function : Author
J.Y. Yu
  • Function : Author

Abstract

We introduce a Hybrid Variable Flavor Number Scheme for heavy flavors, denoted H-VFNS, which incorporates the advantages of both the traditional Variable Flavor Number Scheme (VFNS) as well as the Fixed Flavor Number Scheme (FFNS). By including an explicit NF-dependence in both the Parton Distribution Functions (PDFs) and the strong coupling constant \alpha_S, we generate coexisting sets of PDFs and \alpha_S for NF={3,4,5,6} at any scale \mu, that are related analytically by the MS-bar matching conditions. The H-VFNS resums the heavy quark contributions and provides the freedom to choose the optimal NF for each particular data set. Thus, we can fit selected HERA data in a FFNS framework, while retaining the benefits of the VFNS to analyze LHC data at high scales. We illustrate how such a fit can be implemented for the case of both HERA and LHC data.

Dates and versions

in2p3-00841171 , version 1 (04-07-2013)

Identifiers

Cite

A. Kusina, F.I. Olness, I. Schienbein, T. Jezo, K. Kovarik, et al.. Hybrid scheme for heavy flavors: Merging the fixed flavor number scheme and variable flavor number scheme. Physical Review D, 2013, 88, pp.074032. ⟨10.1103/PhysRevD.88.074032⟩. ⟨in2p3-00841171⟩
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