Search for dark matter produced in association with a Higgs boson decaying to two bottom quarks 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, (2016) Search for dark matter produced in association with a Higgs boson decaying to two bottom quarks in pp collisions at √s=8  TeV with the ATLAS detector. Physical Review D, 93 (7). 072007. ISSN 2470-0010

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (887kB)

Abstract

This article reports on a search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks, using data from 20.3  fb−1 of pp collisions at a center-of-mass energy of 8 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson is reconstructed as a high-momentum b¯b system with either a pair of small-radius jets, or a single large-radius jet with substructure. The observed data are found to be consistent with the expected Standard Model backgrounds. Model-independent upper limits are placed on the visible cross sections for events with a Higgs boson decaying into b¯b and large missing transverse momentum with thresholds ranging from 150 to 400 GeV. Results are interpreted using a simplified model with a Z′ gauge boson decaying into different Higgs bosons predicted in a two-Higgs-doublet model, of which the heavy pseudoscalar Higgs decays into a pair of dark matter particles. Exclusion limits are also presented for the mass scales of various effective field theory operators that describe the interaction between dark matter particles and the Higgs boson.

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: Richard Chambers
Date Deposited: 15 Feb 2017 11:17
Last Modified: 05 Jul 2017 09:03
URI: http://sro.sussex.ac.uk/id/eprint/66761

View download statistics for this item

📧 Request an update
Project NameSussex Project NumberFunderFunder Ref
STFC Consolidated Grant SupplementG1316STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M000753/1