Notre Dame physicists part of Top Ten Breakthroughs of 2012 | News | Notre Dame News | University of Notre Dame Skip To Content Skip To Navigation Skip To Search University of Notre Dame Notre Dame News Experts ND in the News Subscribe About Us Home Contact Search Menu Home › News › Notre Dame physicists part of Top Ten Breakthroughs of 2012 Notre Dame physicists part of Top Ten Breakthroughs of 2012 Published: December 14, 2012 Author: Gene Stowe Higgs illustration (Courtesy CMS/CERN) University of Notre Dame researchers were involved in two of the Top Ten Breakthroughs of 2012 announced today by Physics World magazine. The Higgs-like boson discovery was No. 1 on the list, and the BaBar experiment, the first direct observation of time reversal violation, was No. 3. Professor of physics Colin Jessop, Research Assistant Professor Nancy Marinelli, and graduate students Doug Berry and Ted Kolberg contributed to the Higgs-like discovery at CERN earlier this year. Jessop, Professor of Physics John LoSecco, postdoctoral associate Wenfeng Wang and graduate student Kyle Knoepfel were on the BaBar team that published “Observation of Time-Reversal Violation in the B0 Meson System” in Physical Review Letters last month. “The B0 Meson System is a class of particles that are known to exhibit violations of the fundamental symmetries of nature,” LoSecco says. “In the experiment, one can look at states of definite ‘flavor’ or states of definite ‘CP’ properties. Since these can be easily distinguished, one can compare the forward flow of time, starting as a well-defined ‘flavor’ state and ending in a well-defined ‘CP’ state, with the backward flow of time in which the initial ‘CP’ state and the final ‘flavor’ state are reversed in time. The two rates have been measured to be different by 14 standard deviations, which is highly significant. These observations are the first direct observation of time reversal violation through the exchange of initial and final states in transitions that can only be connected by a time-symmetry transformation.” Physics World reviewed more than 350 of the articles that it published in 2012 to select the breakthroughs, based on the fundamental importance of the research, the significant advance in knowledge it provided, its strong connection between theory and experiment and its general interest to all physicists. Other cited research involved Majorana fermions, particles that are their own antiparticles; galaxy-cluster motion; viewing fluorescent objects behind opaque barriers; the first maser that operates at room temperature; measuring the tiny amount of heat released when an individual bit of data is erased; a new technique for entangling photons using orbital angular momentum; the first demonstration of communications using neutrinos; and a new system that converts kinetic energy into chemical energy in a single step. Contact: Colin Jessop, 574-631-5657, cjessop@nd.edu Posted In: Research Home Experts ND in the News Subscribe About Us Related October 05, 2022 Astrophysicists find evidence for the presence of the first stars October 04, 2022 NIH awards $4 million grant to psychologists researching suicide prevention September 29, 2022 Notre Dame, Ukrainian Catholic University launch three new research grants September 27, 2022 Notre Dame, Trinity College Dublin engineers join to advance novel treatment for cystic fibrosis September 22, 2022 Climate-prepared countries are losing ground, latest ND-GAIN index shows For the Media Contact Office of Public Affairs and Communications Notre Dame News 500 Grace Hall Notre Dame, IN 46556 USA Facebook Twitter Instagram YouTube Pinterest © 2022 University of Notre Dame Search Mobile App News Events Visit Accessibility Facebook Twitter Instagram YouTube LinkedIn