Abstract
We study the prospects of searches for exotic long-lived particles with the MoEDAL detector at the LHC, assuming the integrated luminosity of 30 fb^{-1} that is expected at the end of Run 3. MoEDAL incorporates nuclear track detectors deployed a few metres away from the interaction point, which are sensitive to any highly-ionizing particles. Hence MoEDAL is able to detect singly- or doubly-charged particles with low velocities beta < 0.15 or < 0.3, respectively, and lifetimes larger than {{mathcal {O}}}(1) ,mathrm{m}/c. We examine the MoEDAL sensitivity to various singly-charged supersymmetric particles with long lifetimes and to several types of doubly-charged long-lived particles with different spins and SU(2) charges. We compare the prospective MoEDAL mass reaches to current limits from ATLAS and CMS, which involve auxiliary analysis assumptions. MoEDAL searches for doubly-charged fermions are particularly competitive.
Highlights
One of the key priorities of the LHC experimental programme is to search for new particles beyond the Standard Model, or at least set robust constraints on their possible existence
We study the prospects of searches for exotic long-lived particles with the MoEDAL detector at the LHC, assuming the integrated luminosity of 30 fb−1 that is expected at the end of Run 3
We have analysed in this paper the prospective sensitivities of the MoEDAL detector for searches for singly- and doublycharged long-lived particles during Run 3 of the LHC, considering the specific examples of supersymmetric particles and scalars and fermions that are suggested by Type-II and Type-III seesaw models of neutrino masses, respectively
Summary
One of the key priorities of the LHC experimental programme is to search for new particles beyond the Standard Model, or at least set robust constraints on their possible existence. We consider here doubly-charged particles that may be scalars or fermions and either singlets or triplets of the SM SU (2)L gauge group, without making any specific assumptions about the models in which they appear.2 Both ATLAS [53,54] and CMS [55] have set limits on certain species of long-lived supersymmetric particles, ATLAS has considered multi-charged particles [56], and CMS [55] has considered one example of a doubly-charged fermion as well as multi-charged particles [57], as we review in Sect.
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