Speaker
Description
Particle physics has entered an era where high-precision calculations are required to compare theoretical predictions with experimental data. In this talk, I will describe a new method to compute the virtual contributions in $k_T$-factorization [1,2], called the auxiliary parton method. This method, which was already successfully applied at LO [3] to describe the forward-forward dijet correlations measured by the ATLAS collaboration for proton-proton and proton-lead collision [4], has been extended to the NLO to calculate the virtual [1] and the real corrections [2].
As I will explain, the formalism developed in [1] and [2] is a fundamental step to bridge the gap between the lowest order calculations and the NLO corrections in hybrid $k_T$-factorization, thus being relevant for a more precise description of the experimental data in the rich field of the so-called small-x physics, such as gluon luminosity saturation and forward jet production.
Affiliation: Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, 46071 Valencia, Spain
mail: alessandro.giachino@ific.uv.es
[1] One-loop gauge invariant amplitudes with a space-like gluon, E. Blanco et al. Nucl.Phys.B 995 (2023) 116322
[2] A new subtraction scheme at NLO exploiting the privilege of kT-factorization, A. Giachino et al., e-Print: 2312.02808 (submitted to JHEP)
[3] A. V. Hameren et al., Phys. Lett. B 795 (2019) 511-515
[4] M. Aaboud et al., (ATLAS Collaboration) Phys. Rev. C 100 (2019) 034903
