TTP19-009 Triple-real contribution to the quark beam function in QCD at next-to-next-to-next-to-leading order

TTP19-009-Triple-real contribution to the quark beam function in QCD at next-to-next-to-next-to-leading order
Kirill Melnikov, Robbert Rietkerk, Lorenzo Tancredi, Christopher Wever
JHEP 1906 (2019) 033
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