The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Heavy quark structure functions in the dipole picture at NLO with massive quarks

Not scheduled

2h

Københavns Universitetsbibliotek Nord

Poster Physics at low-x and gluon saturation Reception and poster session

Speaker

Risto Sakari Paatelainen

Description

In this talk, we report on the recent calculation of the total NLO dipole picture DIS cross sections for longitudinal and transverse virtual photons with quark masses [1,2,3]. This calculation has required solving a longstanding issue concerning quark mass renormalization in light cone perturbation theory. The quark masses are renormalized in the pole mass scheme, satisfying constraints from the requirement of Lorentz invariance of the quark Dirac and Pauli form factors. Using these cross sections, we also show our recent numerical predictions for the small-x heavy quark structure functions and demonstrate that the obtained results are in excellent agreement with the HERA data [4].

[1] G. Beuf, T. Lappi R. Paatelainen, Phys.Rev.D 104 (2021) 5, 056032
[2] G. Beuf, T. Lappi R. Paatelainen, Phys.Rev.D 106 (2022) 3, 034013
[3] G. Beuf, T. Lappi R. Paatelainen, Phys.Rev.Lett. 129 (2022) 7, 072001
[4] H. Hänninen, H. Mäntysaari, R. Paatelainen, J. Penttala, 2211.03504 [hep-ph]