期刊
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷 42, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0954-3899/42/9/095004
关键词
deep inelastic scattering; nucleon structure functions; QCD coupling constant; NNLO level; power corrections
资金
- RFBR [13-02-01005-a]
Deep inelastic scattering data on F-2 structure function obtained by BCDMS, SLAC and NMC collaborations in fixed-target experiments are analyzed in the non-singlet approximation with next-to-next-to-leading-order accuracy. The strong coupling constant is found to be alpha(s)(M-Z(2)) = 0.1157 +/- 0.0022 (total exp. error) + {(+0.0028)(-0.0016) (theor), which is seen to be well compatible with the average world value. The results, obtained in the present paper by carrying out fits similar to what were performed in (B G Shaikhatdenov et al 2010 Phys. Rev. D 81 034008), with the exception for systematic errors in BCDMS data taken into account in a different way, confirm our previous ones derived in that same paper. This study is also meant to at least partially explain differences in the latest predictions for LHC observables, caused by usage of different sets of parton distribution functions obtained by different groups.
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