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The ABM parton distributions tuned to LHC data

S. Alekhin
(
- DESY, Zeuthen and
- Serpukhov, IHEP
)
,
J. Blumlein
(
- DESY, Zeuthen
)
,
S. Moch
(
- DESY, Zeuthen and
- Hamburg U., Inst. Theor. Phys. II
)

Oct 11, 2013

21 pages

Published in:

Phys.Rev.D 89 (2014) 5, 054028

Published: Mar 25, 2014

e-Print:

1310.3059 [hep-ph]

DOI:

10.1103/PhysRevD.89.054028

Report number:

DESY-13-183,
DO-TH-13-26,
SFB-CPP-13-71,
LPN-13-068

Experiments:

ABM

View in:

ADS Abstract Service

reference search303 citations

Citations per year

Abstract: (APS)

We present a global fit of parton distributions at next-to-next-to-leading order (NNLO) in QCD. The fit is based on the world data for deep-inelastic scattering, fixed-target data for the Drell-Yan process and includes, for the first time, data from the Large Hadron Collider (LHC) for the Drell-Yan process and the hadroproduction of top-quark pairs. The analysis applies the fixed-flavor number scheme for nf=3, 4, 5, uses the MS¯ scheme for the strong coupling αs and the heavy-quark masses and keeps full account of the correlations among all nonperturbative parameters. At NNLO this returns the values of αs(MZ)=0.1132±0.0011 and mt(pole)=171.2±2.4 GeV for the top-quark pole mass. The fit results are used to compute benchmark cross sections for the Higgs production at the LHC to NNLO accuracy. We compare our results to those obtained by other groups and show that differences can be linked to different theoretical descriptions of the underlying physical processes.

Note:

31 pages, 15 figures

12.38.Bx
12.38.Qk
parton: distribution function
mass: pole
heavy quark: mass
higher-order: 2
CERN LHC Coll
Drell-Yan process
deep inelastic scattering
quantum chromodynamics

References(124)

Figures(18)

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