Group of physicists found that the existence of rotating black holes (also known as Kerr black holes), imposes constraints on the mass of the photon in some theories, which are extensions of the Standard Model.
The existence of black holes was first predicted in the early XX century. Holes are considered to be the simplest so-called hole event horizon, named after the pioneer of the theory of relativity, Karl Schwarzschild. He proposed a solution to the Einstein equations for a spherically symmetric body.
Of the Schwarzschild solution indicated that under certain conditions, the mass of the body and its radius, the gravitational field around will be so strong that even light can not leave it, that is a black hole.
Over time, the object model more complicated. For example, there were rotating black hole, known as the Kerr hole. They differ from the holes near the Schwarzschild dynamic effects and are named after the British astrophysicist John Kerr. It is such a hole saw physics published in Physical Review Letters paper.
Conducting complex calculations (scientists first considered all in a slow rotation mode, and then resented the results to get the information for the modes at high speed), the researchers were able to clarify the mechanism of interaction of a photon with a massive hole. The results showed that if the mass of the particles larger than a certain value, the Kerr black hole must lose energy in an explosive manner. As a result, it was found that the photon mass is not above 10 22 eV.
Massive photons arise in various extensions of the Standard Model – the theory that describes the world of elementary particles.