Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at s =8 TeV

(CMS Collaboration)

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb-1 of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. The results are interpreted in terms of 90% confidence level limits on the DM-nucleon scattering cross section, as a function of the DM particle mass, for both spin-dependent and spin-independent scenarios. Limits are set on the effective cutoff scale Λ, and on the annihilation rate for DM particles, assuming that their branching fraction to quarks is 100%. Additionally, the most stringent 95% confidence level limits to date on the unparticle model parameters are obtained.

Original languageEnglish
Article number052011
JournalPhysical Review D
Volume93
Issue number5
DOIs
Publication statusPublished - 2016 Mar 22

Bibliographical note

Publisher Copyright:
© 2016 CERN., for the CMS Collaboration. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at s =8 TeV'. Together they form a unique fingerprint.

Cite this