Search for long-lived charged particles in proton-proton collisions at sqrt(s) = 13 TeV

TL;DR

This paper reports a search for long-lived charged particles in proton-proton collisions at 13 TeV, setting new mass limits and cross section constraints, with the most stringent gluino mass limit to date.

Contribution

First search at 13 TeV for long-lived charged particles using CMS data, establishing new mass limits and detection constraints.

Findings

No excess over background observed.

Gluino mass limits up to 1610 GeV.

Constraints on production cross sections for various long-lived particles.

Abstract

Results are presented of a search for heavy stable charged particles produced in proton-proton collisions at sqrt(s) = 13 TeV using a data sample corresponding to an integrated luminosity of 2.5 inverse femtobarns collected in 2015 with the CMS detector at the CERN LHC. The search is conducted using signatures of anomalously high energy deposits in the silicon tracker and long time of flight measurements by the muon system. The data are consistent with the expected background, and upper limits are set on the cross sections for production of long-lived gluinos, top squarks, tau sleptons, and leptonlike long-lived fermions. These upper limits are equivalently expressed as lower limits on the masses of new states; the limits for gluinos, ranging up to 1610 GeV, are the most stringent to date. Limits on the cross sections for direct pair production of long-lived tau sleptons are also determined.