Dipole factorization for DIS at NLO: Combining the q(q)over-bar and q(q)over-barg contributions

The next-to-leading order (NLO) corrections to the deep inelastic scattering structure functions F-2 and F-L (or equivalently the photon-target cross sections sigma(gamma)(T)* and sigma(gamma)(L)*) at low x(Bj) are obtained, as a generalization of the dipole factorization formula. For the first time, the contributions of both the q (q) over bar and the q (q) over barg Fock states in the photon are directly calculated, using earlier results [G. Beuf, Phys. Rev. D 94, 054016 (2016)] for the q (q) over bar light-front wave functions at one loop inside a dressed virtual photon. Both the q (q) over bar and q (q) over barg 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 sigma(gamma)(T)* and sigma(gamma)(L)* is discussed.