Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at √s=8  TeV with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, et al. (2014) Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at √s=8  TeV with the ATLAS detector. Physical Review D, 90 (012004). ISSN 2470-0010

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Abstract

A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3  fb−1 of pp collisions at √s=8  TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely charged electrons or muons consistent with the decay of a Z boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark-matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with Z bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 05 May 2017 09:18
Last Modified: 05 May 2017 09:26
URI: http://sro.sussex.ac.uk/id/eprint/67669

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Project NameSussex Project NumberFunderFunder Ref
ATLASG0275STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/I006048/1