Title: | Search for Dark Matter Particles Produced in Association with a Top Quark Pair at s =13 TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Asilar, E Bergauer, T Brandstetter, J Dragicevic, M Erö, J Escalante Del Valle, A Flechl, M Frühwirth, R Ghete, VM Hrubec, J Jeitler, M Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Rad, N Rohringer, H Schieck, J Schöfbeck, R Spanring, M Spitzbart, D Taurok, A Waltenberger, W Wittmann, J Wulz, CE Zarucki, M Chekhovsky, V Mossolov, V Suarez Gonzalez, J De Wolf, EA Di Croce, D Janssen, X Lauwers, J Pieters, M Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Abu Zeid, S Blekman, F D'Hondt, J De Bruyn, I De Clercq, J Deroover, K Flouris, G Lontkovskyi, D Lowette, S Marchesini, I Moortgat, S Moreels, L Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Beghin, D Bilin, B Brun, H Clerbaux, B De Lentdecker, G Delannoy, H Dorney, B Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Kalsi, AK Lenzi, T Luetic, J Postiau, N Starling, E Thomas, L Vander Velde, C Vanlaer, P Vannerom, D Wang, Q Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D Roskas, C Trocino, D Tytgat, M Verbeke, W Vermassen, B Vit, M Zaganidis, N |
Keywords: | Particle dark matter;Particle production |
Issue Date: | 2019 |
Publisher: | American Physical Society |
Citation: | Physical Review Letters |
Abstract: | A search is performed for dark matter particles produced in association with a top quark pair in protonproton
collisions at ffiffi
s p ¼ 13 TeV. The data correspond to an integrated luminosity of 35.9 fb−1 recorded
by the CMS detector at the LHC. No significant excess over the standard model expectation is observed.
The results are interpreted using simplified models of dark matter production via spin-0 mediators that
couple to dark matter particles and to standard model quarks, providing constraints on the coupling strength
between the mediator and the quarks. These are the most stringent collider limits to date for scalar
mediators, and the most stringent for pseudoscalar mediators at low masses. |
URI: | http://bura.brunel.ac.uk/handle/2438/17486 |
DOI: | http://dx.doi.org/10.1103/PhysRevLett.122.011803 |
ISSN: | 0031-9007 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
|
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.