In new research, the quest to understand the dark matter, the scientist have determined about the effective size of the dark matter particles and how strong will be the interactions with the regular matter which are much smaller than what we thought.
Researchers have used the XENON1T dark matter detector, which has produced the experimental results and it has established the most stringent limit to date to know the effective size of the dark matter particles. This type of detector is the most sensitive instrument of its kind, and it can limit the size parameter to about 4.1X10-47 square centimetres. In this, there are two backgrounds events which are radon contamination, and the neutrons are produced in the detector environment, or gamma rays contamination in which it is predicted to occur in the detector, but they don’t.
According to the Ethan Brown, who is the member of the XENON Collaboration and physicist at Rensselaer Polytechnic Institute in New York said that this occurs because they cannot differentiate between the dark matter signals and the background signals. He said that if we could see the dark matter signal, then we can measure the size, but as we cannot see it, we can say that it can be smaller than this amount. If there are two signals, then they would be attributed to the background events, and as there are no events detected, background or dark matter particles are now smaller than what we have thought.
The result of the experiments is presented on Monday at a seminar which was held at the Gran Sasso Underground Laboratory in Italy. The detector has used the liquid xenon, and a dark matter particle collides with the xenon nucleus, and if the scientist’s models are correct, then the collision should produce the small light flash, and it is said to be the rare opportunity to observe the dark matter.
Elena Aprile, who is the project leader from Rensselaer has said that these experimental results are due to the culmination of 279 days of data. This experiment will aim to reduce the background events like radon contamination in the system. By this way, the system can able to detect even smaller and rarer interactions from these mysterious particles.