Extraction of parton distributions and αs from DIS data within a Bayesian treatment of systematic errors

被引：39

作者：

Alekhin, SI ^{[1
]}

机构：

[1] Inst High Energy Phys, Protvino 142284, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 10卷 / 03期

关键词：

D O I：

10.1007/s100520050763

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We have performed a NLO QCD global fit of BCDMS, NMC, H1 and ZEUS data with full account of point-to-point correlations using the Bayesian approach to the treatment of systematic errors. Parton distributions in the proton with their experimental uncertainties, including both statistical and systematic, are obtained. The gluon distribution in a wide region of x is found to be softer than the gluon distribution extracted in standard global analyses which include prompt photon data. We obtain a robust estimate of alpha(s)(M-Z) = 0.1146 +/- 0.0036 (greater than or equal to 75% C.L.) based on Chebyshev's inequality, which is compatible with an earlier determination of alpha(s) from the DIS data, but is less dependent on high-twist effects.

引用

页码：395 / 403

页数：9

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