Minimum Bias, MPI and DPS, Diffractive and Exclusive measurements at CMS

TL;DR

This paper reports on CMS measurements of minimum bias, MPI, DPS, diffractive, and exclusive processes at 7 and 8 TeV, providing insights into proton structure and QCD dynamics with comparisons to models.

Contribution

It presents new experimental results on various scattering processes at the LHC, including double parton scattering and diffractive cross sections, with comparisons to theoretical models and previous data.

Findings

Double parton scattering cross sections are measured and compared to models.

Inclusive diffractive cross sections are consistent with theoretical predictions.

First combined CMS+TOTEM measurement of charged particle pseudorapidity distribution at 8 TeV.

Abstract

We present recent results on Minimum Bias, MPI and DPS, Diffractive and Exclusive studies using data collected during Run 1 of the LHC. The measurements include data collected in pp collisions at $\sqrt s = 7$, and $8$ TeV by the CMS Collaboration. Double parton scattering is investigated in several final states including vector bosons and jets, and the effective cross section results are compared to other experiments and to MPI models tuned to recent underlying event measurements at CMS. Inclusive diffractive cross sections are discussed and compared to models, while searches and measurements of central exclusive processes are presented. The results from the first combined measurement by the CMS+TOTEM collaborations of the pseudorapidity distribution of charged particles at 8 TeV are also discussed, and are compared to models and to lower energy measurements.