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

The CMS Collaboration (2016) Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at √s=8  TeV. Physical Review D, D93 (5), [052011].

Record type: Article

## 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.

Full text not available from this repository.

Published date: 22 March 2016
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 408350
URI: http://eprints.soton.ac.uk/id/eprint/408350
ISSN: 1550-7998
PURE UUID: f6b2bf99-6d61-405e-bb14-9ba24b508f02
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 19 May 2017 04:04

## Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration