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Space Research Focus: Scientist developed a method for predicting the composition of dark matter & invisible matter detected only by its gravitational pull

Their work, from the journal Physical Review Letters, focuses on predicting “cosmological signatures” on models of black matter that weigh between electron and proton. Previous methods had predicted similar signatures on simpler models of black story. This research is developing new ways to obtain these signatures on more complex models, which further research and notes the authors of the paper.

“Tests looking for black stuff is not the only way to learn more about this kind of mysterious story,” said Cara Giovanetti, Ph.D. student at the University of New York Department of Physics and lead author of the paper.”Accurate measurements of different universal parameters – for example, the total amount of helium in the universe, or the temperature of various particles in the original universe – can also teach us much about black matter,” adds Giovanetti, describing the method described in the Physical Review paper.

In a study, conducted by Hongwan Liu, a NYU postdoctoral associate, Joshua Ruderman, a professor at the NYU Department of Environmental Affairs, and Princeton physicist Mariangela Lisanti, Giovanetti and her fellow authors focused on the big bang nucleosynthesis (BBN) – the process by which light substances are formed, such as helium, hydrogen, and lithium. The presence of invisible black matter affects how each of these elements will be formed. Also significant in these cases is the background of the cosmic microwave (CMB) – the electromagnetic radiation, produced by combining electrons and protons, which remains behind the formation of the universe.The team sought to find a way to detect the existence of a specific class of black matter – which weighed between that of electrons and protons – by developing models that consider both BBN and CMB.

“Such black matter can change the abundance of certain substances produced in the original universe and leave a mark on the cosmic microwave environment by changing how fast the universe grows,” explains Giovanetti. In its research, the team made predictions of cosmological signatures related to the existence of certain types of black matter. These signatures are the result of something black that changes the temperature of different particles or changes how fast the universe grows.

Their results have shown that very light black matter will lead to a different number of light objects than is seen in astrophysical observations. Light-colored objects can make the universe grow faster so that these elements do not have the opportunity to evolve, ”says Giovanetti, describing another situation.”We learn from our analysis that some black models cannot have a very small mass, otherwise the atmosphere may look very different from what we see,” he adds.

Source Reference: Cara Giovanetti, Mariangela Lisanti, Hongwan Liu, Joshua T. Ruderman. Joint Cosmic Microwave Background and Big Bang Nucleosynthesis Constraints on Light Dark Sectors with Dark RadiationPhysical Review Letters, 2022; 129 (2) DOI: 10.1103/PhysRevLett.129.021302

Read Also:<strong>Space technology Focus: The Aditya-L1 mission is India’s first dedicated spacecraft mission to study the Sun</strong><strong></strong>

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