Electromagnetic contribution to charge symmetry violation in parton distributions

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dc.contributor.authorWang, X.
dc.contributor.authorThomas, A.
dc.contributor.authorYoung, R.
dc.date.issued2016
dc.description.abstractWe report a calculation of the combined effect of photon radiation and quark mass differences on charge symmetry violation (CSV) in the parton distribution functions of the nucleon. Following a recent suggestion of Martin and Ryskin, the initial photon distribution is calculated in terms of coherent radiation from the proton as a whole, while the effect of the quark mass difference is based on a recent lattice QCD simulation. The distributions are then evolved to a scale at which they can be compared with experiment by including both QCD and QED radiation. Overall, at a scale of 5 GeV², the total CSV effect on the phenomenologically important difference between the d and u-quark distributions is some 20% larger than the value based on quark mass differences alone. In total these sources of CSV account for approximately 40% of the NuTeV anomaly.
dc.description.statementofresponsibilityX.G. Wang, A.W. Thomas, R.D. Young
dc.identifier.citationPhysics Letters B, 2016; 753:595-599
dc.identifier.doi10.1016/j.physletb.2015.12.062
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.orcidWang, X. [0000-0001-9164-0027]
dc.identifier.orcidThomas, A. [0000-0003-0026-499X]
dc.identifier.orcidYoung, R. [0000-0002-4527-1811]
dc.identifier.urihttp://hdl.handle.net/2440/100080
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FL0992247
dc.relation.granthttp://purl.org/au-research/grants/arc/DP150103101
dc.relation.granthttp://purl.org/au-research/grants/arc/DP110101265
dc.relation.granthttp://purl.org/au-research/grants/arc/FT120100821
dc.rights© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3
dc.source.urihttps://doi.org/10.1016/j.physletb.2015.12.062
dc.subjectCharge symmetry; parton distributions; electromagnetic correction
dc.titleElectromagnetic contribution to charge symmetry violation in parton distributions
dc.typeJournal article
pubs.publication-statusPublished

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