Search for large extra dimensions in dimuon and dielectron events in pp collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports a search for large extra spatial dimensions using dimuon and dielectron events in proton-proton collisions at 7 TeV, setting limits on the quantum gravity scale based on LHC data.

Contribution

The study provides new experimental limits on the size of extra dimensions by analyzing LHC collision data with the CMS detector.

Findings

No deviation from the standard model observed.

Limits on the quantum gravity scale range from 2.4 TeV to 3.8 TeV.

Results constrain theories with large extra dimensions.

Abstract

Results are presented from a search for large, extra spatial dimensions in events with either two isolated muons or two isolated electrons. The data are from proton-proton interactions at sqrt(s) = 7 TeV collected with the CMS detector at the LHC. The size of the data sample corresponds to an integrated luminosity of approximately 2 inverse femtobarns. The observed dimuon and dielectron mass spectra are found to be consistent with standard-model expectations. Depending on the number of extra dimensions, the 95% confidence level limits from the combined dimuon and dielectron channels range from Ms > 2.4 TeV to Ms > 3.8 TeV, where Ms characterizes the scale for the onset of quantum gravity.