Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/100080
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Type: | Journal article |
Title: | Electromagnetic contribution to charge symmetry violation in parton distributions |
Author: | Wang, X. Thomas, A. Young, R. |
Citation: | Physics Letters B: Nuclear Physics and Particle Physics, 2016; 753:595-599 |
Publisher: | Elsevier |
Issue Date: | 2016 |
ISSN: | 0370-2693 1873-2445 |
Statement of Responsibility: | X.G. Wang, A.W. Thomas, R.D. Young |
Abstract: | We 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. |
Keywords: | Charge symmetry; parton distributions; electromagnetic correction |
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 |
DOI: | 10.1016/j.physletb.2015.12.062 |
Grant ID: | http://purl.org/au-research/grants/arc/FL0992247 http://purl.org/au-research/grants/arc/DP150103101 http://purl.org/au-research/grants/arc/DP110101265 http://purl.org/au-research/grants/arc/FT120100821 |
Published version: | http://dx.doi.org/10.1016/j.physletb.2015.12.062 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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hdl_100080.pdf | Published version | 486.97 kB | Adobe PDF | View/Open |
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