(The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences) When heavy ions, accelerated to the speed of light, collide with each other in the depths of European or American accelerators, quark-gluon plasma is formed for fractions of a second, or even its “cocktail” seasoned with other particles. According to scientists from the IFJ PAN, experimental data show that there are underestimated actors on the scene: photons. Their collisions lead to the emission of seemingly excess particles, the presence of which could not be explained.
Original source: https://www.eurekalert.org/pub_releases/2021-04/thni-cwc042921.php