Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/11244
Title: Search for the production of dark matter in association with top-quark pairs in the single-lepton final state in proton-proton collisions at √S= 8TeV
Authors: The, CMSC
Khachatryan, V
Khachatryan, V
Sirunyan, AM
Tumasyan, A
Adam, W
Bergauer, T
Dragicevic, M
Erö, J
Friedl, M
Frühwirth, R
Benucci, L
Cimmino, A
Costantini, S
Reid, ID
Crucy, S
Fagot, A
Kyberd, P
Garcia, G
Mccartin, J
Ocampo Rios, AA
Poyraz, D
Ryckbosch, D
Hobson, PR
Cole, JE
Frühwirth, R
Ghete, VM
Hartl, C
Hörmann, N
Hrubec, J
Jeitler, M
Jeitler, M
Kiesenhofer, W
Knünz, V
Krammer, M
Krammer, M
Krätschmer, I
Liko, D
Mikulec, I
Rabady, D
Rabady, D
Rahbaran, B
Rohringer, H
Schöfbeck, R
Strauss, J
Treberer-Treberspurg, W
Waltenberger, W
Wulz, CE
Wulz, CE
Mossolov, V
Shumeiko, N
Suarez Gonzalez, J
Alderweireldt, S
Bansal, S
Cornelis, T
De Wolf, EA
Janssen, X
Knutsson, A
Lauwers, J
Luyckx, S
Ochesanu, S
Rougny, R
Van De Klundert, M
Van Haevermaet, H
Van Mechelen, P
Van Remortel, N
Van Spilbeeck, A
Blekman, F
Blyweert, S
D Hondt, J
Daci, N
Heracleous, N
Keaveney, J
Lowette, S
Maes, M
Olbrechts, A
Python, Q
Strom, D
Tavernier, S
Van Doninck, W
Van Mulders, P
Van Onsem, GP
Villella, I
Caillol, C
Clerbaux, B
De Lentdecker, G
Dobur, D
Favart, L
Gay, APR
Grebenyuk, A
Léonard, A
Mohammadi, A
Perniè, L
Perniè, L
Randle-conde, A
Reis, T
Seva, T
Thomas, L
Vander Velde, C
Vanlaer, P
Wang, J
Zenoni, F
Adler, V
Beernaert, K
Teodorescu, L
Keywords: Hadron-Hadron Scattering;Beyond Standard Model
Issue Date: 2015
Publisher: Springer Berlin Heidelberg
Citation: Journal of High Energy Physics, 2015: 121, (2015)
Abstract: A search is presented for particle dark matter produced in association with a pair of top quarks in pp collisions at a centre-of-mass energy of √S= 8TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 19.7 fb<sup>−1</sup>. This search requires the presence of one lepton, multiple jets, and large missing transverse energy. No excess of events is found above the SM expectation, and upper limits are derived on the production cross section. Interpreting the findings in the context of a scalar contact interaction between fermionic dark matter particles and top quarks, lower limits on the interaction scale are set. These limits are also interpreted in terms of the dark matter-nucleon scattering cross sections for the spin-independent scalar operator and they complement direct searches for dark matter particles in the low mass region.
URI: http://link.springer.com/article/10.1007%2FJHEP06%282015%29121
http://bura.brunel.ac.uk/handle/2438/11244
DOI: http://dx.doi.org/10.1007/JHEP06(2015)121
ISSN: 1126-6708
1029-8479
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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