The 3, 4, and 5-flavor NNLO Parton from Deep-Inelastic-Scattering Data and at Hadron Colliders
Aug, 2009
34 pages
Published in:
- Phys.Rev.D 81 (2010) 014032
e-Print:
- 0908.2766 [hep-ph]
Report number:
- DESY-09-102,
- SFB-CPP-09-072
Experiments:
View in:
Citations per year
Abstract: (arXiv)
We determine the parton distribution functions (PDFs) in a next-to-next-to-leading order (NNLO) QCD-analysis of the inclusive neutral-current deep-inelastic-scattering (DIS) world data combined with the neutri{-}no-nucleon DIS di-muon data and the fixed-target Drell-Yan data. The PDF-evolution is performed in the fixed-flavor scheme and supplementary sets of PDFs in the 4- and 5-flavor schemes are derived from the results in the 3-flavor scheme using matching conditions. The charm-quark DIS contribution is calculated in a general-mass variable-flavor-number (GMVFN) scheme interpolating between the zero-mass 4-flavor scheme at asymptotically large values of momentum transfer and the 3-flavor scheme prescription of Buza-Matiounine-Smith-van Neerven (BMSN) at the value of . The results in the GMVFN scheme are compared with those of the fixed-flavor scheme and other prescriptions used in global fits of PDFs. The strong coupling constant is measured at an accuracy of . We obtain at NNLO in the fixed-flavor scheme and W^{\pm}ZNote:
- 33 pages, 14 figures, Journal version
- 12.38.Bx
- 11.10.Hi
- 12.38.Qk
- 14.65.Ha
- parton: distribution function
- Higgs particle: hadroproduction
- strong interaction: coupling constant
- neutrino nucleon: deep inelastic scattering
- flavor: 3
- flavor: 4
References(85)
Figures(17)