Parton distributions incorporating QED contributions
Parton distributions incorporating QED contributions
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DOI：
10.1140/epjc/s2004-02088-7
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
Alan D. Martin;R. G. Roberts;W. Stirling;R. Thorne
中科院分区：
文献类型：
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作者：
Alan D. Martin;R. G. Roberts;W. Stirling;R. Thorne
We perform a global parton analysis of deep inelastic and related hard-scattering data, includingcorrections to the parton evolution. Although the quality of the fit is essentially unchanged, there are two important physical consequences. First, the different DGLAP evolution ofuanddtype quarks introduces isospin violation, i.e., which is found to be unambiguously in the direction to reduce the NuTeVanomaly. A second consequence is the appearance of photon parton distributionsof the proton and the neutron. In principle these can be measured at HERA via the deep inelastic scattering processes; our predictions are in agreement with the present data.
