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−1. 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.
| Original language | English |
|---|---|
| Article number | 121 |
| Journal | Journal of High Energy Physics |
| Volume | 2015 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2 2015 |
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Keywords
- Beyond Standard Model
- Hadron-Hadron Scattering
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
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. / The CMS collaboration.
In: Journal of High Energy Physics, Vol. 2015, No. 6, 121, 02.06.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - 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
AU - The CMS collaboration
AU - Khachatryan, V.
AU - Sirunyan, A. M.
AU - Tumasyan, A.
AU - Adam, W.
AU - Bergauer, T.
AU - Dragicevic, M.
AU - Erö, J.
AU - Friedl, M.
AU - Frühwirth, R.
AU - Ghete, V. M.
AU - Hartl, C.
AU - Hörmann, N.
AU - Hrubec, J.
AU - Jeitler, M.
AU - Kiesenhofer, W.
AU - Knünz, V.
AU - Krammer, M.
AU - Krätschmer, I.
AU - Liko, D.
AU - Mikulec, I.
AU - Rabady, D.
AU - Rahbaran, B.
AU - Rohringer, H.
AU - Schöfbeck, R.
AU - Strauss, J.
AU - Treberer-Treberspurg, W.
AU - Waltenberger, W.
AU - Wulz, C. E.
AU - Mossolov, V.
AU - Shumeiko, N.
AU - Suarez Gonzalez, J.
AU - Alderweireldt, S.
AU - Bansal, S.
AU - Cornelis, T.
AU - De Wolf, E. A.
AU - Janssen, X.
AU - Knutsson, A.
AU - Lauwers, J.
AU - Luyckx, S.
AU - Ochesanu, S.
AU - Rougny, R.
AU - Van De Klundert, M.
AU - Van Haevermaet, H.
AU - Van Mechelen, P.
AU - Van Remortel, N.
AU - Van Spilbeeck, A.
AU - Blekman, F.
AU - Blyweert, S.
AU - D’Hondt, J.
AU - Radi, A.
PY - 2015/6/2
Y1 - 2015/6/2
N2 - 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−1. 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.
AB - 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−1. 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.
KW - Beyond Standard Model
KW - Hadron-Hadron Scattering
UR - http://www.scopus.com/inward/record.url?scp=84934757800&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84934757800&partnerID=8YFLogxK
U2 - 10.1007/JHEP06(2015)121
DO - 10.1007/JHEP06(2015)121
M3 - Article
VL - 2015
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 6
M1 - 121
ER -