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Dark-matter-spin effects at future e+e- colliders
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DOI：10.1007/JHEP08(2020)052.png)
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Abstract
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We discuss the possibility to detect spin 0, 1 and 1/2dark matter (DM) at futuree(+)e(-)colliders. The models considered here are simple, consistent and renormalizable field theories that provide correct DM abundance and satisfy direct detection, indirect detection and collider constraints. The intention of this paper was to verify to what extent it might be possible to disentangle models of different DM spins by the measurement of the cross section for e(+)e(-)-> Z+ MIDLINE HORIZONTAL ELLIPSIS at futuree(+)e(-)colliders. We specialize to the case of the ILC operating at root s = 250 GeV, however our results apply as well for the FCC-ee and the CEPC colliders. For each model the cross section maximized with respect to parameters was calculated and compared to the expected 95% CL cross-section limits estimated for the ILC. It turned out that near the 2m(DM) similar or equal to m(1,2) resonances, wherem(1)andm(2)are the SM Higgs boson and a non-standard Higgs boson masses, respectively, there exist substantial regions where the models are testable. A special attention has been payed to calculation of the cross section in the region where m(1) similar or equal to m(2).
Keywords:
Beyond Standard Model
Dark matter
e(+)-e(-) Experiments
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