Hunting the Ghosts of the Universe: Unraveling the Neutrino Enigma — A team of researchers from |
The Majorana Demonstrator, a six-year experiment conducted by researchers from Indiana University and international collaborators, sought to answer significant questions about fundamental physics laws, particularly regarding neutrinos.
One aspect they hoped to observe was whether the neutrino could be its own antiparticle – a subatomic particle of the same mass but with the opposite electric charge. Since the neutrino is uncharged, it is the only particle in the universe that could be its own antiparticle. Understanding that would provide insight into why the neutrino has mass in the first place – information that would have widespread impacts in understanding how the universe was formed.
Pettus and a team of IU students were responsible primarily for analyzing data from the experiment. Graduate student Nafis Fuad, undergraduate senior Isaac Baker, sophomore Abby Kickbush and Jennifer James, a student with the Research Experiences for Undergraduates Program, have been involved in the project. Their focus has been on understanding the stability of the experiment, analyzing details of the recorded waveforms, and characterizing backgrounds.
“We didn’t see the decay we were looking for, but we have raised the bar on where to look for the physics we’re going after,” Pettus said. “True to its name, the Demonstrator advanced critical technologies that we are already leveraging for the next phase of the experiment in Italy. We may not have broken our picture of physics yet, but we’ve certainly pushed the horizons, and I am very excited about what we have accomplished.
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