Muons

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Interview with William Marciano, Senior Physicist at Brookhaven National Laboratory. Marciano recounts his upbringing in Brooklyn and his early interests in science, and he describes his undergraduate work at RPI and then NYU. He explains his decision to remain at NYU for his graduate research to study under the direction of Alberto Sirlin, and his thesis research on dimensional regularization. Marciano discusses his postdoctoral appointment at Rockefeller University where he worked on the SU(5) model of Grand Unification, and the opportunities that led to his promotion there to a faculty position. He explains his short tenure at Northwestern before joining Brookhaven, where kaon physics was taking center stage, and where ISABELLE was being built. Marciano discusses the origins of the Lab's g-2 experiment, and he compares the demise of ISABELLE to that of the SSC, for which he served on the program advisory committee. He describes the success of RHIC, and he discusses his research focus on muon and neutrino physics for the Lab's AGS program. Marciano explains his proposal that led to DUNE at Fermilab and he surveys his long record of advisory work for the HEPAP community and how the United States has contributed to the LHC. He reflects on winning the Sakurai prize and his contributions in establishing the validity of the Standard Model at the level of its quantum corrections. Marciano describes his recent work in dark physics, and he surveys the current state of play in muon physics and the Intensity Frontier. At the end of the interview, Marciano compares the diffuse network of the U.S. National Lab system to the centrality of CERN in Europe, and he explains why his work on DUNE and CP violation has been so personally meaningful.

In this interview, David Nygren discusses: the problem of the university and specialization in addressing global challenges; reaction to the muon anomaly in the g-2 experiment at Fermilab; work on particle physics with at University of Washington; experimentation at Berkeley lab; post-doc at Columbia with Jack Steinberger working to measure the semileptonic charge asymmetry in neutral kaon decays to find evidence of CP symmetry violation; building an MWPC-based detector; experimental work with Owen Chamberlain and the Bevatron, developing the Bevalac; invention and design of the Time Projection Chamber (TPC) at Berkeley; early models of the TPC and concerns during development; Pief Panofsky; PEP-4 TPC success; involvement with doomed supercolliding super conductor (SSC) project; development of pixel-based vertex detector/smart pixel arrays; making deep-depletion charge coupled devices (CCDs) with Steve Holland; Carl Rubbia; x-ray mammography research with leading to the Philips MicroDose System; contributions to the NESTOR Project neutrino muon detector; involvement with IceCube and gathering digital data; discussion of the AMANDA array; using gas time projection chamber to look for neutrinoless double beta decacy (NLDBD); collaboration with Juan José Gómez Cardenas; using biochemistry to make connections for NLDBD discoveries; the question of whether the neutrino is its own antiparticle; development of Single Molecue Fluorescence Imaging (SMFI); Q-Pix idea; progress building Q-Pix detectors; work at UTA using the Earth-Human System as a way to reorient the university toward the big picture of climate change. Toward the end of the interview, Nygren reflects on his own “eureka moments,” the “failures” that led to deeper learning, his mixed feelings about the future of the planet, and the belief that physics can be a training ground for the new ideas humanity will need. 

Interview with David G. Hitlin, Professor of Physics at California Institute of Technology. Hitlin discusses his thesis work on high-resolution muonic X-ray studies with his advisor and mentor Chien-Shiung Wu, and his subsequent transition to elementary particle physics at SLAC. He relates his experiences with kaon physics as a member of Mel Schwartz’s group at SLAC and Stanford. As a member of the Richter group at SLAC he worked on the Mark II experiment and then founded the Mark III experiment at SPEAR. After moving to Caltech in 1979, he worked on the SLD experiment at the SLC and then as founding Spokesman of the BABAR experiment at PEP-II. The interview ends with a discussion of his current involvements with the Fermilab experiment Mu2e and the nascent SLAC experiment LDMX.

Interview with Toichiro Kinoshita, a Japanese-born physicist who is best known for pioneering the value of muon g-2, the anomalous magnetic moment of the muon. Kinoshita describes his education—Daiichi High School, Tokyo University—how he avoided military service during World War II, and meeting and marrying his wife, Masako Matsuoka. He describes his introduction to quantum electrodynamics and renormalization through papers by Dyson and Feynman. His early research also involved work on the C-meson theory developed by Sakata. After the war, Kinoshita came to the United States to the Institute for Advanced Study, then as a postdoc at Columbia in 1954. In 1955 Kinoshita moved to Cornell. He became particularly interested in making calculations to test the theory of quantum electrodynamics. He describes his introduction to computers at Princeton, using von Neumann’s computer. The interview covers how he became interested in calculating g-2 at CERN in 1966, and his subsequent efforts, the first being the sixth order calculation, where the light-by-light diagram enters for the first time. He describes his efforts doing the eighth order calculation, and his collaboration with Makiko Nio, as well as his calculations of the tenth order. Physicists whom he describes more than briefly include Kodaira, Tomonaga, Nambu, and Nio. Near the end, Kinoshita describes the importance of g-2 experiments, and his recent work.