Search for contact interactions and large extra dimensions in the dilepton mass spectra from proton-proton collisions at √s=13 TeV
Journal of High Energy Physics, vol.2019, no.4, 2019 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 2019 Issue: 4
- Publication Date: 2019
- Doi Number: 10.1007/jhep04(2019)114
- Journal Name: Journal of High Energy Physics
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Keywords: Beyond Standard Model, Hadron-Hadron scattering (experiments)
- Open Archive Collection: AVESIS Open Access Collection
- Yıldız Technical University Affiliated: Yes
Abstract
A search for nonresonant excesses in the invariant mass spectra of electron and muon pairs is presented. The analysis is based on data from proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the CMS experiment in 2016, corresponding to a total integrated luminosity of 36 fb −1 . No significant deviation from the standard model is observed. Limits are set at 95% confidence level on energy scales for two general classes of nonresonant models. For a class of fermion contact interaction models, lower limits ranging from 20 to 32 TeV are set on the characteristic compositeness scale Λ. For the Arkani-Hamed, Dimopoulos, and Dvali model of large extra dimensions, the first results in the dilepton final state at 13 TeV are reported, and values of the ultraviolet cutoff parameter Λ T below 6.9 TeV are excluded. A combination with recent CMS diphoton results improves this exclusion to Λ T below 7.7 TeV, providing the most sensitive limits to date in nonhadronic final states.[Figure not available: see fulltext.]