Abstract
The MoEDAL experiment at the LHC is optimised to detect highly ionising particles such as magnetic monopoles, dyons and (multiply) electrically charged stable massive particles predicted in a number of theoretical scenarios. MoEDAL, deployed in the LHCb cavern, combines passive nuclear track detectors with magnetic monopole trapping volumes (MMTs), while spallation-product backgrounds are being monitored with an array of MediPix pixel detectors. An introduction to the detector concept and its physics reach, complementary to that of the large general purpose LHC experiments ATLAS and CMS, will be given. Emphasis is given to the recent MoEDAL results at 13 TeV, where the null results from a search for magnetic monopoles in MMTs exposed in 2015 LHC collisions set the world-best limits on particles with magnetic charges more than 1.5 Dirac charge. The potential to search for heavy, long-lived supersymmetric electrically-charged particles is also discussed.
Highlights
MoEDAL (Monopole and Exotics Detector at the LHC) [1, 2], the 7th experiment at the Large Hadron Collider (LHC) [3], was approved by the CERN Research Board in 2010
These include a strip in the focus-point region where the relic density of the lightest supersymmetric particle (LSP) is brought down into the range allowed by cosmology because of its relatively large Higgsino component, a region where the relic density is controlled by rapid annihilation through direct-channel heavy Higgs resonances, and a strip where the relic LSP density is reduced by coannihilations with near-degenerate staus and other sleptons
Summary and outlook MoEDAL is going to extend considerably the LHC reach in the search forstable highly ionising particles
Summary
MoEDAL (Monopole and Exotics Detector at the LHC) [1, 2], the 7th experiment at the Large Hadron Collider (LHC) [3], was approved by the CERN Research Board in 2010. Magnetic trappers A unique feature of the MoEDAL detector is the use of paramagnetic magnetic monopole trappers (MMTs) to capture electrically- and magnetically-charged highly-ionising particles For the 2015 run at 13 TeV, the MMT was upgraded to an array consisting of 672 square aluminium rods with dimension 19×2.5×2.5 cm for a total mass of 222 kg in 14 stacked boxes that were placed 1.62 m from the IP8 LHC interaction point under the beam pipe on the side opposite to the LHCb detector Its decay via photon emission would produce a peculiar trajectory in the medium, should the decaying states are magnetic multipoles [7]
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