https://phys.org/news/2018-05-mathuslaa-idea-long-lived-particles-lhc.html

With no new discoveries in the years since Higgs was found, researchers have begun to grow impatient. Some physicists wonder if the other particles might ever be observed, while others have started questioning basic assumptions about such particles, such as how long they exist after a collision. As Shelton noted when presenting the team's paper, detectors at LHC have been set to look for only those that live a very short while. But, she wondered, what if they last longer than thought? She and the rest of the team have proposed constructing a building near the LHC that would house other detectors to note the presence of longer-lived particles that have made their way out of the collider altogether. Such a building, they say, would be separated from the LHC by several feet of granite, which would serve as a filter for other particle debris.

The team has named the proposed new project the Massive Timing Hodoscope for Ultra Stable Neutral Particles, or MATHUSLA, for short. They believe it could be built for the relatively low cost of just $50 million.

                                                            
                                    
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