New findings from Jefferson Laboratory shed light on the process of forming strange matter from ordinary matter. Nuclear physicists have made a groundbreaking discovery through their unique analysis of experimental data. For the first time ever, they have observed the production of lambda particles
This achievement has been the culmination of many years of hard work. The data that was used in this study was originally gathered in 2004. Lamiaa El Fassi, who is currently serving as an associate professor of physics at Mississippi State University and is the lead researcher of this project, initially analyzed these data while she was working on her thesis project to obtain her graduate degree on a different topic.
“Because the proton or neutron is totally broken apart, there is little doubt that the electron interacts with the quark inside,” El Fassi said., the “struck” quark begins moving as a free particle in the medium, typically joining up with other quark it encounters to form a new composite particle as they propagate through the nucleus. And some of the time, this composite particle will be a lambda.
The analysis was so challenging, it took several years for El Fassi and her group to re-analyze the data and extract these results. It was her thesis advisor, Kawtar Hafidi, who encouraged her to pursue the investigation of the lambda from these datasets. “I’m very happy and motivated to see this work being published,” said Chetry, who is now a postdoctoral researcher at Florida International University.A notable finding from this intensive analysis changes the way physicists understand how lambdas form in the wake of particle collisions.
A better understanding of how different particles form helps physicists in their effort to decipher the strong interaction, the fundamental force that holds these quark-containing particles together. The dynamics of this interaction are very complicated, and so is the theory used to describe it: quantum chromodynamics .
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