Soft diffraction within the QCD color dipole picture

Abstract

In this work we consider the QCD parton saturation models to describe soft interactions at the high energy limit. The total and elastic cross sections as well as the elastic slope parameter are obtained for proton-proton and pion-proton collisions and compared to recent experimental results. The analyses are done within the color dipole formalism taking into account saturation models which have been tested against DIS data. The main point is that the match between soft and hard interaction occurs in the saturation region which can be described by high density QCD approaches. Discussion is performed on the main theoretical uncertainties associated with calculations.

Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework

“…[61]. In [61], the inclusive distribution with fixed multiplicity or limited multiplicity class is considered, and it is assumed to obey the same relations (18) and (20) as for inclusive case. In addition, the replacements…”

“…We also discuss the role played by the hadronization process regarding the transition of produced gluons into hadrons and how the scaling would be violated in this situation. Within the saturated regime p T < Q s ðxÞ, the saturation framework has the advantage that the saturation scale regulates the typical divergent infrared (IR) behavior of the cross sections, which gives us the possibility to calculate observables usually associated with nonperturbative physics like the total pp cross section [19][20][21]. Furthermore, we analyze the feasibility of our parametrization in describing observables that involve the soft region, such as the rapidity distribution and the average p T of the produced gluons.…”

Determination of the entanglement entropy in elastic scattering using model-independent method for hadron femtoscopy

“…Although it is tempting to follow the same parton saturation frameworks to treat the entropy of produced hadron in soft region in collider energies, here we will use a non-perturbative approach. The saturation scale provide us with a semihard scale at high energies, which allows to extend the perturbative analysis deep in the soft region as we shown in [14]. However, the measured observables as the differential elastic cross section at small−t and total cross section should be dominated by non-perturbative aspects of QCD and a S-matrix approach is more appropriated.…”

Investigating the inclusive transverse spectra in high-energy $pp$ collisions in the context of geometric scaling framework

“…We also discuss the role played by the hadronization process regarding the transition of produced gluons into hadrons and how the scaling would be violated in this situation. Within the saturated regime, p T < Q s (x), the saturation framework has the advantage that the saturation scale regulates the typical divergent infrared (IR) behavior of the cross sections, which gives us the possibility to calculate observables usually associated with non-perturbative physics like the total pp cross section [19][20][21]. Furthermore, we analyze the feasibility of our parameterization in describing observables that involve the soft region, as the rapidity distribution and the average p T of the produced gluons.…”