Quarks

In this interview, Harvey Lynch, retired and formerly Assistant Director in the Research Division of SLAC is interviewed by David Zierler. He recounts his upbringing in California and his early interests in science, and he describes his undergraduate experience at MIT, where David Frisch proved to be a formative influence for his work in particle physics. Lynch discusses his work at the Cherenkov light ring, and he explains his decision to pursue graduate work at Stanford to work with David Ritson on inelastic electron-proton scattering. He describes the origins of SLAC, and he cites the mysteries surrounding quarks and SU3 symmetries as among the most important research questions in the field at that time. Lynch discusses his motivation to do postdoctoral research at CERN, where he worked with Carlo Rubbia on CP violation, and he recounts Burt Richter’s offer to join SLAC in 1968. He describes his early work on planar spark chambers and his longtime involvement in the SPEAR project which aimed to take a new approach to elementary particle physics. Lynch details the operational and technical challenges to get SPEAR up and running, and how it epitomized SLAC’s independence in making internal decisions without DOE approval in the early days of the Lab. He describes witnessing the “November Revolution” of 1974 and what this meant for SLAC and particle physics generally. Lynch explains his decision to join the PETRA collaboration and the TASSO detector at DESY. He describes his reasons to return to the U.S., first at UC Santa Barbara until he was recruited back to SLAC, where he witnessed significant changes as a result of Burt Richter succeeding Wolfgang “Pief” Panofsky as director. Lynch discusses his concurrent work on PEP physics, SLC design work, and the proposal for the international SLD project. He explains his work with the Center for International Security and Arms Control at Stanford and his involvement with the SDI defense initiative, and he describes his involvement in the design phase of the SSC project. Lynch offers a post-mortem on the SSC cancellation, and expresses relief that he was able to return to SLAC, where he joined the BaBar project and served as chairman of the Radiation Safety Committee. He describes his last seven years at SLAC during which he worked exclusively on administrative matters, and at the end of the interview, Lynch discusses his work for the National Academy of Science to study boost-phase missile defense. 

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In this interview, Oscar Wallace (Wally) Greenberg recalls his experiences growing up in New Jersey as the child of Jewish immigrants from Eastern Europe and his accelerated education at Rutgers University and Princeton University, where his advisor was Arthur Wightman. He discusses his dissertation called “The Asymptotic Condition in Quantum Field Theory,” postdocs at Brandeis with S. S. Schweber and at MIT with Francis Low, and early work on high-energy limits and the general structure of quantum field theory. He reflects on his landmark proposal that quarks have a three-valued charge, later called color, as well as the delayed acceptance of the idea, his prediction of later measurements of the excited states of baryons, and his propensity not to promote his contributions. Greenberg also discusses his acceptance of a position at the University of Maryland, where he would spend most of his career, as well as visiting appointments elsewhere, and he offers anecdotes about his interactions with J. Robert Oppenheimer and Albert Einstein at the Institute for Advanced Study. The interview concludes with discussions of what remains unknown in particle physics and of cosmology as a “laboratory” with particle energies not available on Earth. A technical addendum to the interview lists 24 of Greenberg’s key contributions to physics.

In this interview, Michael Turner discusses his life and career. topics include: Kavli Foundation; Kavli Institute for Cosmological Physics; Fred Kavli; Aspen Center for Physics; Rand Corporation; California Institute of Technology (Caltech); Robbie Vogt; Ed Stone; Barry Barish; SLAC National Accelerator Laboratory; B.J. Bjorken; University of Chicago; Dave Schramm; Kip Thorne; Fermi Institute / University of Chicago Institute for Nuclear Studies; Bob Wagoner; University of California, Santa Barbara; Larry Smarr; Dan Goldin; quarks-to-cosmos study; National Science Foundation; Rita Colwell; Advanced LIGO; Atacama Large Millimeter Array (ALMA); IceCube South Pole Neutrino Observatory; Department of Energy; Argonne National Laboratory; Paul Steinhardt.

Interview with Wit Busza, Francis L. Friedman Professor of Physics Emeritus at MIT. He recounts his birth in Romania as his family was escaping Poland at the start of World War II, and his family's subsequent moves to Cyprus and then to British Palestine, where he lived until he was seven, until the family moved to England. He describes the charitable circumstances that allowed him to go to Catholic boarding school, his early interests in science, and the opportunities that led to his undergraduate education in physics at University College in London, where he stayed on for his PhD while doing experiments at CERN working with Franz Heymann. Busza describes the development of spark chambers following the advances allowed by bubble chambers, and his thesis research using the Chew-Low extrapolation to calculate the probability that the proton is a proton plus a pi-zero. He describes meeting Martin Perl and the opportunities that led to his postdoctoral position at SLAC, which he describes in the late 1960s as being full of brilliant people doing the most exciting physics and where he focused on rho proton cross-sections. Busza describes meeting Sam Ting at SLAC which led to Busza's faculty appointment at MIT, where he discovered his talent for teaching. He discusses the complications associated with the discovery of the J/psi and his developing interest in relativistic heavy ion physics, the E178 project at Fermilab to examine what happens when high energy hadrons collide, and the E665 experiment to study quark propagation through nuclear matter. Busza describes the import of the RHIC and PHOBOS collaborations, and he discusses his return to SLAC to focus on WIC and SLD. He describes the global impact of the LHC and CERN, and his satisfaction at being a part of what the DOE called the best nuclear physics group in the country. In the last part of the interview, Busza reflects on the modern advances in atomic and condensed matter physics, which were inconceivable for him to imagine at the beginning of his career, he describes the considerations leading to his retirement, and why, if could re-live his career, he would think harder about being a theorist.

Interview with Geoffrey West, Shannan Distinguished Professor at the Santa Fe Institute. West provides a brief history of SFI as a collaborative idea between Murray Gell-Mann, Phil Anderson, and David Pines, and he explains the funding sources that launched the Institute. He recounts his childhood in England and his family’s Jewishly-observant household. West describes his switch from math to physics as an undergraduate at Cambridge and his interest in becoming involved in the origins of SLAC at Stanford. He discusses Panofsky and the “Monster Accelerator,” and studying fold factors of the triton and helium-3 nuclei under the direction of Leonard Schiff. West describes his subsequent postdoctoral work at Cornell and the formative influence of Ken Wilson, and his next position at Harvard where he pursued research on the quark proton model into a kind of a covariant framework. West explains his decision to join the faculty back at Stanford, he conveys the excitement at SLAC in deep inelastic research, and he provides a backdrop of the work that would become the “November Revolution” in 1974. He describes the importance of meeting Peter Carruthers and his reasons for transferring to the theory group at Los Alamos. West discusses his moral conflict working at a Lab with such close ties to nuclear weapon research, and he credits the Manhattan Project as the intellectual source for the Lab’s multidisciplinary approach. West discusses how the culture at Los Alamos served as a prototype for SFI, and how at that point he had migrated intellectually from high energy physics to string theory, and how both organizations encouraged the kind of multidisciplinary approach that encouraged his interests in biological populations. He describes his tenure as SFI president and his developing interest in sustainability, he prognosticates on what the SFI education model could contribute to post-pandemic higher education, and he explains how the pandemic has influenced his views on the future of cities. At the end of the interview, West describes his current interest in biological lifespans and he reflects on the extent to which is unorthodox career trajectory could serve as a model for scientists who will increasingly work in realms less bounded by strict departmental divisions.

In this interview, Peter McIntyre, Mitchell-Heep professor of experimental physics at Texas A&M University, and president of Accelerator Technology Corporation discusses his career and achievements as a professor. McIntyre recounts his childhood in Florida, and he explains his decision to pursue physics as an undergraduate at the University of Chicago and the influence of his longtime hero Enrico Fermi. He discusses his interests in experimental physics and he explains his decision to stay at Chicago for graduate school, where he worked with Val Teledgi, during a time he describes as the last days of bubble chamber physics. McIntyre conveys his intense opposition to the Vietnam War and the extreme lengths he took to avoid being drafted, and his dissertation work on the Ramsey resonance in zero field. He describes Telegdi’s encouragement for him to pursue postdoctoral research at CERN where he worked with Carlo Rubbia on the Intersecting Storage Rings project. He describes his time as an assistant professor at Harvard and his work at Fermilab, and the significance of his research which disproved Liouville’s theorem. McIntyre describes the series of events leading to his tenure at Texas A&M, and he explains how his hire fit into a larger plan to expand improve the physics program there. He discusses the completion of the Tevatron at Fermilab and the early hopes for the discovery of the mass scale of the Higgs boson, and he describes the origins of the SSC project in Texas and the mutually exclusive possibility that Congress would fund the International Space Station instead. McIntyre describes the key budgetary shortfalls that essentially doomed the SSC from the start, his efforts in Washington to keep the project viable, and the technical shortcomings stemming from miscommunication and stove-piping of expertise. He describes his involvement in the discovery of the top quark and the fundamental importance of the CDF, DZero, and ATLAS collaborations. McIntyre discusses his achievements as a teacher to undergraduates and a mentor to graduate students, and he assesses the current and future prospects for ongoing discovery in high energy physics. At the end of the interview, McIntyre describes his current wide-ranging research interests, including his efforts to improve the entire diagnostic infrastructure in screening and early detection of breast cancer.

In this interview, Sheldon Glashow, Professor of Physics Emeritus at Harvard University and Professor of Physics Emeritus at Boston University, reflects on his career and Nobel Prize winning work. He discusses his childhood friendship with Steve Weinberg and his passion for science from a young age. He reflects on his decision to attend Cornell University for undergrad and details the physics curriculum at the time. Glashow describes his time as a graduate student at Harvard University studying under Julian Schwinger. He discusses his time as a post-doc at the Institute for Theoretical Physics in Copenhagen working on the SU(2)XU(1) theory, which would later win him a Nobel prize in 1979. He speaks about working with Murray Gell-Mann while at Caltech and their collaboration on a paper together. Glashow details being hired as a full professor at Harvard University. He discusses his frequent collaboration with Alvaro De Rujula. He discusses the concept of string theory and how it has evolved over the years. He discusses the loss of the superconducting super collider and reflects on where particle and theoretical physics may be today had it been built. Lastly, Glashow reflects on his goals for "Inference: International Review of Science", of which he is the editor-at-large.

In this interview, David Coward reflects on his time at Stanford University and the formation of SLAC. Coward discusses his time as an undergraduate student at Cornell University. He describes how his desire to study under Pief Panofsky influenced his decision to attend Stanford University for graduate school and how Panofsky later encouraged him to work for SLAC. Additionally, he continually reflects upon the role of Panofsky throughout his life and his leadership in the formation of SLAC. Coward details how his engineering background helped him construct a spectrometer facility at SLAC. He details his various sabbaticals at CERN and reflects upon the different work cultures that existed at different labs. He discusses his contributions to a study on quarks that later earned a Nobel Prize in 1990. Coward Reflects on the development of the Spectrometer Facilities Group and his role in putting the team together. He discusses a paper the group published in 1975 on polarized electron-electron scattering at GeV energies that proved the quark model of the proton. Lastly, Coward discusses his experience living in Palo Alto and the progress made in the area during his time there, such as the installation of bike paths and the undergrounding of power lines.

Interview with Phiala Shanahan, assistant professor of physics in the Center for Theoretical Physics at MIT. Shanahan explains the administrative relationship between the department and the Center, and she recounts her childhood in Adelaide, Australia, her experiences at an all-girls school and the benefits this conferred in nurturing her interest in science. She discusses her concentration in computational physics and the mass of the H-dibaryon at the University of Adelaide and her decision to stay on with her undergraduate advisors, Anthony Thomas and Ross Young, for graduate school. Shanahan describes her interest in the proton radius puzzle as a research entry point for her thesis work and why she was interested in how particle physics can be connected more rigorously to quarks, gluons, and ultimately chemistry. She describes the opportunities leading to her postdoctoral research at MIT and some of the cultural adjustments she had to make coming from Australia. Shanahan discusses her collaboration with Will Detmold and she describes her contributions to the NPL-QCD research project and she discusses her first faculty appointment at William & Mary before returning to MIT where she remains in her current appointment and where she is pursuing work on proton structures and in creating ever-faster algorithms. She describes the potential benefits that would be conferred with the availability of true quantum computing for her field, and she describes some of the difficulties she has faced as a woman in getting recognized for her accomplishments in her field of research. At the end of the interview, she emphasizes why her long-term goal is to bridge nuclear physics and chemistry, and why she wants to keep an open mind about pursuing other areas that are both interesting and offer the opportunity to push forward discovery in foundational ways.