Dipole subtraction at next-to-leading order in nonrelativistic-QCD factorization
Dipole subtraction at next-to-leading order in nonrelativistic-QCD factorization
We describe an implementation of a subtraction scheme in the nonrelativistic-QCD treatment of heavy-quarkonium production at next-to-leading-order in the strong-coupling constant, covering S - and P -wave bound states. It is based on the dipole subtraction in the massless version by Catani and Seymour and its extension to massive quarks by Phaf and Weinzierl. Important additions include the treatment of heavy-quark bound states, in particular due to the more complicated infrared-divergence structure in the case of P -wave states.
Nuclear physics <Amsterdam> / B Particle physics B 950, 114843 - (2020). doi:10.1016/j.nuclphysb.2019.114843
Published by North-Holland Publ. Co., Amsterdam
quarkonium: heavy, quantum chromodynamics: nonrelativistic, quark: massive, strong interaction: coupling constant, quantum chromodynamics: factorization, higher-order: 1, quarkonium: production, structure, heavy quark: bound state, 530, dipole, infrared problem
quarkonium: heavy, quantum chromodynamics: nonrelativistic, quark: massive, strong interaction: coupling constant, quantum chromodynamics: factorization, higher-order: 1, quarkonium: production, structure, heavy quark: bound state, 530, dipole, infrared problem
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