Improved fits to the xF3 CCFR data at the next-to-next-to-leading order and beyond - INSPIRE

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Improved fits to the xF3 CCFR data at the next-to-next-to-leading order and beyond

A.L. Kataev
(
- CERN and
- Moscow, INR
)
,
G. Parente
(
- Santiago de Compostela U.
)
,
A.V. Sidorov
(
- Dubna, JINR
)

Jun, 2001

42 pages

Published in:

Phys.Part.Nucl. 34 (2003) 20-46,
Fiz.Elem.Chast.Atom.Yadra 34 (2003) 43-88,
Phys.Part.Nucl. 38 (2007) 6, 827-827 (erratum)

e-Print:

hep-ph/0106221 [hep-ph]

DOI:

10.1134/S1063779607060068

Report number:

CERN-TH-2001-058

View in:

reference search146 citations

Citations per year

Abstract:

Using the results for the NNLO QCD corrections to anomalous dimensions of odd

xF_3

Mellin moments and N

^3

LO corrections to their coefficient functions we improve our previous analysis of the CCFR'97 data for

xF_3

. The possibility of extracting from the fits of

1/Q^2

-corrections is analysed using three independent models,including infrared renormalon one. Theoretical quetion of applicability of the renormalon-type inspired large-

\beta_0

approximation for estimating corrections to the coefficient functions of odd

xF_3

and even non-singlet

F_2

moments are considered. The comparison with [1/1] Pad\'e estimates is given. The obtained NLO and NNLO values of

\alpha_s(M_Z)

are supporting the results of our less definite previous analysis and are in agreement with the world average value

\alpha_s(M_Z)\approx 0.118

. We also present first N

^3

LO extraction of

\alpha_s(M_Z)

. The interplay between higher-order perturbative QCD corrections and

1/Q^2

-terms is demonstrated. The results of our studies are compared with those obtained recently using the NNLO model of the kernel of DGLAP equation and with the results of the NNLO fits to CCFR'97

xF_3

data, performed by the Bernstein polynomial technique.

neutrino nucleon: deep inelastic scattering
nucleon: structure function
quantum chromodynamics: correction
perturbation theory: higher-order
effect: higher-twist
renormalization group
correction: nonperturbative
strong interaction: coupling constant
numerical calculations
interpretation of experiments: Batavia TEVATRON PS

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Figures(0)

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