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Precision NNLO determination of α s(M Z) using an unbiased global parton set

Abstract:

We determine the strong coupling α s at NNLO in perturbative QCD using the global dataset input to the NNPDF2.1 NNLO parton fit: data from neutral and charged current deep-inelastic scattering, Drell-Yan, vector boson production and inclusive jets. We find α s(M Z)=0.1173±0.0007 stat, where the statistical uncertainty comes from the underlying data and uncertainties due to the analysis procedure are negligible. We show that the distribution of α s values preferred by different experiments in ...

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Authors


Bertone, V More by this author
Del Debbio, L More by this author
Guffanti, A More by this author
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Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
707
Issue:
1
Pages:
66-71
Publication date:
2012-01-16
DOI:
ISSN:
0370-2693
URN:
uuid:8500ced6-e151-4143-b9c8-e5798bfaad1b
Source identifiers:
477512
Local pid:
pubs:477512
Language:
English

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