Fifth Force in Nature ?

In a result published in Physical Review Letters, scientists on the Atomki nuclear physics experiment in Hungary claimed to have turned up potential evidence of a particle that could point to an entirely new fundamental force of nature


Professor Shaaban Khalil , the CFP director, with Ahmed Thabet , the PEU student who was working on his senior graduation project published with UK collaborators a paper in Physical Review D 99 , 055022 , on 18 th of March 2019 to explain this results in an extension of the standard model of particle physics. They show that a new particle, called Z ’ gauge boson with mass 17 MeV can account for the anomaly observed by the Atomki experiment.