Multi-parton correlations and "exclusive" cross sections

TL;DR

This paper explores the differences between inclusive and exclusive cross sections in multiple parton interactions, emphasizing the role of hadron structure correlations and their impact on experimental measurements.

Contribution

It provides a detailed analysis of how non-perturbative correlations affect exclusive cross sections in multi-parton interactions, extending understanding beyond inclusive models.

Findings

Exclusive cross sections involve different non-perturbative inputs than inclusive ones.

Correlation effects are significant at the level of single, double, and triple parton collisions.

The study clarifies the experimental implications of multi-parton correlations.

Abstract

In addition to the inclusive cross sections discussed within the QCD-parton model, in the regime of multiple parton interactions, different and more exclusive cross sections become experimentally viable and may be suitably measured. Indeed, in its study of double parton collisions, the quantity measured by CDF was an "exclusive" rather than an inclusive cross section. The non perturbative input to the "exclusive" cross sections is different with respect to the non perturbative input of the inclusive cross sections and involves correlation terms of the hadron structure already at the level of single parton collisions. The matter is discussed in details keeping explicitly into account the effects of double and of triple parton collisions.