The next-to-leading order (NLO) corrections to the deep inelastic scattering structure functions F2 and FL (or equivalently the photon-target cross sections σγ∗T and σγ∗L) at low xBj are obtained, as a generalization of the dipole factorization formula. For the first time, the contributions of both the q¯q and the q¯qg Fock states in the photon are directly calculated, using earlier results [G. Beuf, Phys. Rev. D 94, 054016 (2016)] for the q¯q light-front wave functions at one loop inside a dressed virtual photon. Both the q¯q and q¯qg contributions have UV divergences, which are shown to cancel each other, using conventional dimensional regularization as UV regulator. Finally, the resummation of high-energy logarithms on top of the NLO results for σγ∗T and σγ*L is discussed.
Dipole factorization for DIS at NLO: Combining the quark-antiquark and quark-antiquark-gluon contributions
Guillaume Beuf
2017-01-01
Abstract
The next-to-leading order (NLO) corrections to the deep inelastic scattering structure functions F2 and FL (or equivalently the photon-target cross sections σγ∗T and σγ∗L) at low xBj are obtained, as a generalization of the dipole factorization formula. For the first time, the contributions of both the q¯q and the q¯qg Fock states in the photon are directly calculated, using earlier results [G. Beuf, Phys. Rev. D 94, 054016 (2016)] for the q¯q light-front wave functions at one loop inside a dressed virtual photon. Both the q¯q and q¯qg contributions have UV divergences, which are shown to cancel each other, using conventional dimensional regularization as UV regulator. Finally, the resummation of high-energy logarithms on top of the NLO results for σγ∗T and σγ*L is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
