Multiple Parton Interactions in Hadron Collisions and Diffraction

TL;DR

This paper explores multiple parton interactions in hadron collisions, proposing a new method to incorporate diffraction effects into the eikonal formalism, and compares predictions with experimental data and higher energy extrapolations.

Contribution

It introduces a novel approach to include diffractive cross sections in a multi-channel eikonal framework for hadron collisions.

Findings

The new method effectively describes diffractive processes.

Comparison with data shows good agreement.

Extrapolation predicts behavior at higher energies.

Abstract

Hadrons are composite objects made of quarks and gluons, and during a collision one can have several elementary interactions between the constituents. These elementary interactions, using an appropriate theoretical framework, can be related to the total and elastic cross sections. At high c.m. energy it also becomes possible to identify experimentally a high pt subset of the parton interactions and to study their multiplicity distribution. Predictions of the multiple interactions rates are difficult because in principle one needs to have a knowledge of the correlated Parton Distribution Functions that describe the probability to find simultaneously different partons in different elements of phase space. In this work we address this question and suggest a method to describe effectively the fluctuations in the instantaneous configuration of a colliding hadron. This problem is intimately related to the origin of the inelastic diffractive processes. We present a new method to include the diffractive cross section in an eikonal formalism that is equivalent to a multi-channel eikonal. We compare with data and present an extrapolation to higher energy.