Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √s=13 TeV
A search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded by the CMS detector in 2016 at the LHC, corr...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Nature
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/66016/1/66016_Search%20for%20dark%20matter%20in%20events%20with%20energetic_article.pdf http://irep.iium.edu.my/66016/2/66016_Search%20for%20dark%20matter%20in%20events%20with%20energetic_scopus.pdf http://irep.iium.edu.my/66016/ https://link.springer.com/article/10.1007%2FJHEP06%282018%29027 |
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| Summary: | A search for dark matter is conducted in events with large missing transverse
momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed
using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded
by the CMS detector in 2016 at the LHC, corresponding to an integrated luminosity of
36 fb−1
. New substructure techniques, including the novel use of energy correlation functions,
are utilized to identify the decay products of the top quark. With no significant
deviations observed from predictions of the standard model, limits are placed on the production
of new heavy bosons coupling to dark matter particles. For a scenario with purely
vector-like or purely axial-vector-like flavor changing neutral currents, mediator masses
between 0.20 and 1.75 TeV are excluded at 95% confidence level, given a sufficiently small
dark matter mass. Scalar resonances decaying into a top quark and a dark matter fermion
are excluded for masses below 3.4 TeV, assuming a dark matter mass of 100 GeV |
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