Study of double parton interactions in diphoton + dijet events in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV

TL;DR

This paper measures the effective cross section of double parton interactions in diphoton + dijet events using data from proton-antiproton collisions at 1.96 TeV, providing insights into the spatial distribution of partons inside protons.

Contribution

It presents the first measurement of the effective cross section for double parton interactions in diphoton + dijet events at the Tevatron, using a large dataset collected by the D0 detector.

Findings

Effective cross section σ_eff = 19.3 ± 1.4 (stat) ± 7.8 (syst) mb.

Analysis of diphoton + dijet events at √s = 1.96 TeV.

Provides constraints on the spatial distribution of partons inside protons.

Abstract

We use a sample of diphoton + dijet events to measure the effective cross section of double parton interactions, which is found to be $\sigma_{\rm eff} = 19.3$ $\pm$ $1.4({\rm stat})$ $\pm$ $7.8({\rm syst})$ mb. The sample was collected by the D0 detector at the Fermilab Tevatron collider in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV and corresponds to an integrated luminosity of 8.7 fb$^{-1}$.