Heavy Z': resonant versus non-resonant searches

Heavy Z': resonant versus non-resonant searches

Collider searches for new vector-like particles such as Z' have mostly been pursued by looking for a peak in the invariant mass spectrum of the decay products. However off-shell Z' exchange may leave an imprint on other kinematic distributions, leading thus to non-resonant searches. The ai...

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Hauptverfasser: La Rochelle, Guillaume Drieu, Elmer, Martin
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Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
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description Collider searches for new vector-like particles such as Z' have mostly been pursued by looking for a peak in the invariant mass spectrum of the decay products. However off-shell Z' exchange may leave an imprint on other kinematic distributions, leading thus to non-resonant searches. The aim of this paper is to assess, in the context of the LHC, the interplay between resonant (s-channel) and non-resonant (t-channel) searches for a generic leptophobic Z' model. We show in particular that while non-resonant searches are less sensitive to small couplings, they tend to be more adapted at high masses and large couplings. We discuss our findings both at the level of the current limits and the expectations at higher luminosities.
doi_str_mv 10.48550/arxiv.1406.2547
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title Heavy Z': resonant versus non-resonant searches
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