High Energy Physics - Experiment
[Submitted on 30 Mar 2015 (v1), last revised 8 Jul 2015 (this version, v5)]
Title:Search for New Physics in SHiP and at future colliders
View PDFAbstract:SHiP is a newly proposed fixed-target experiment at the CERN SPS with the aim of searching for hidden particles that interact very weakly with SM particles. The work presented in this document investigates SHiP's physics reach in the parameter space of the Neutrino Minimal Standard Model ($\nu$MSM), which is a theory that could solve most problems left open by the Standard Model with sterile neutrinos. A model introducing an extra $U(1)$ symmetry in the hidden sector, providing a natural candidate for dark matter, is also explored. This work shows that the SHiP experiment can improve by several orders of magnitude the sensitivity to Heavy Neutral Leptons below 2 GeV, scanning a large part of the parameter space below the $B$ meson mass. The remainder of the $\nu$MSM parameter space, dominated by right-handed neutrinos with masses above 2 GeV, can be explored at a future $e^+e^-$ collider. Similarly, SHiP can greatly improve present constraints on $U(1)$ dark photons.
Submission history
From: Elena Graverini [view email][v1] Mon, 30 Mar 2015 10:19:05 UTC (51 KB)
[v2] Wed, 1 Apr 2015 07:08:50 UTC (51 KB)
[v3] Sat, 4 Apr 2015 10:57:01 UTC (51 KB)
[v4] Mon, 18 May 2015 08:38:00 UTC (52 KB)
[v5] Wed, 8 Jul 2015 13:16:58 UTC (52 KB)
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