Stable massive particles
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In Collider Experiments[1]
Heavy, exotic particles interacting with matter and which can be directly detected through collider experiments are termed as Stable massive particles or SMPs. More specifically an SMP is defined to be a particle that can pass through a detector without decaying and can undergo electromagnetic or strong interaction with matter. Searches for SMPs have been carried out across a spectrum of collision experiments such as lepton-hadron, hadron-hadron, and electron-positron. Although none of these experiments have detected an SMP, they have put substantial constraints on the nature of SMPs.
If the SMPs are ever discovered, several questions related to the origin and constituent of dark matter and about the unification of four fundamental forces would be answered.
In Non-Collider Experimets[2]
In the case of the non-collider experiments, SMPs are defined as sufficiently long-lived particles which exist either as relics of the big bang singularity or are the products of secondary collisions, and are beyond the range of any conceivable accelerator experiment.
During the proton-proton collisions with center of mass energy equal to 13 TeV at ATLAS detector, a search for charged SMPs was carried out. In this case SMPs were defined as particles with mass significantly more than that of standard model particles, sufficient lifetime to reach the ATLAS hadronic calorimeter and with measurable electric charge while it passes through the tracking chambers.
Other Searches for SMPs
The MoEDAL experiment in its list of primary goals, includes the direct search for highly ionizing SMPs and psedo-SMPs.
References
- ^ Fairbairn, M.; Kraan, A.C.; Milstead, D.A.; Sjöstrand, T.; Skands, P.; Sloan, T. (1 January 2007). "Stable massive particles at colliders". Physics Reports. 438 (1): 1–63. arXiv:hep-ph/0611040. Bibcode:2007PhR...438....1F. doi:10.1016/j.physrep.2006.10.002. ISSN 0370-1573. S2CID 14872649. Archived from the original on 28 April 2021. Retrieved 28 April 2021.
- ^ Burdin, Sergey; Fairbairn, Malcolm; Mermod, Philippe; Milstead, David; Pinfold, James; Sloan, Terry; Taylor, Wendy (6 October 2014). "Non-collider searches for stable massive particles". arXiv:1410.1374 [hep-ex, physics:hep-ph]. 582: 1. arXiv:1410.1374. Bibcode:2015PhR...582....1B. doi:10.1016/j.physrep.2015.03.004. S2CID 118333394. Archived from the original on 21 October 2020. Retrieved 28 April 2021.
- ^ Heinrich, Jochen Jens. Search for charged stable massive particles with the ATLAS detector (Thesis).