Large Hadron Collider

In this interview, David Zierler, Oral Historian for AIP, interviews Gordon Kane, Victor Weisskopf Distinguished Professor of Physics at the University of Michigan. He explains why came to hold a chair in Weisskopf’s honor and he describes his affiliation with the Leinweber Center for Theoretical Physics. Kane recounts his childhood in Minnesota and the opportunities that led to his enrollment in physics at MIT and his graduate work at Illinois to work with J.D. Jackson. He explains that the major topic in particle theory during his graduate work was understanding nucleon scattering and the significance of Geoff Chew’s bootstrap mechanism. Kane talks about his contribution to the discovery of the omega minus at Brookhaven and his research at the Rutherford Lab. He explains his decision to join the faculty at Michigan and his interest in group theory because of the advances made by Murray Gell-Mann. Kane describes the early work in the search for physics beyond the Standard Model, and he explains the value of string theory at the Planck scale. He discusses the possible new physics that would have been discovered at the SSC and why compactified M theory offers a plausible path to moving beyond the Standard Model. Kane explains why string theory is testable and why string theory predicts axions, he offers some possible candidates for dark matter and what compactified M theory offers cosmic inflation. At the end of the interview, Kane discusses his current interests in quark masses and charge leptons, he explains some of the advantages inherent in teaching at a large public university, and he describes why communicating science to popular audiences has always been important to him.

This interview is part of a series conducted during research for the book Tunnel Visions, a history of the Superconducting Super Collider project. It mainly addresses parts of Sir Christopher Llewellyn Smith’s career prior to his time as CERN Director-General, a position he held from 1994 to 1999, focusing on international perspectives surrounding the proposal and construction of large collider facilities. It covers his service as the scientific advisor to the 1984 Kendrew inquiry, which assessed UK membership in CERN, and to another inquiry, led by Anatole Abragam, which assessed CERN’s management. The interview extensively covers CERN’s preparations to build what became the Large Hadron Collider (LHC) in the tunnel where the Large Electron-Positron (LEP) collider was built, and how those preparations were influenced by the U.S. move to build the SSC and, later, by the SSC’s declining political fortunes and termination. Llewellyn Smith offers his perspectives on whether it would have been politically feasible in the 1980s to build a “world accelerator,” as well as on Japanese perceptions of U.S. plans for the SSC and the prospect that the U.S. could have secured contributions to the project from Japan. He also discusses early cost estimates for the LHC and their role in efforts to secure support for building it. The interview concludes with discussions of how CERN, the SSC, and the ITER fusion facility project were organized, and of the distinct roles of major facility directors and project managers.

Interview with Berndt Müller, James B. Duke Professor of Physics at Duke University. The interview begins with Müller discussing his current work on quark-gluon plasma physics and the connections between nuclear physics and cosmology. Müller then recounts his family history in Germany during and after WWII, as well as his childhood in West Germany. He recalls his undergraduate studies at Goethe University Frankfurt, where it was the inspiring lectures that catalyzed his enthusiasm for physics. Müller explains the heavy ion research he was involved in at the time, as well as his master’s thesis on the Dirac equation. He recounts his first visit to Berkeley Lab in 1972 and his subsequent acceptance of a postdoc at University of Washington and a fellowship at Yale. Müller then returned to Frankfurt as an associate professor and explains how he got involved in quark-gluon plasma research. Müller talks about the creation of the RHIC and how that led him to pursue his next job in the US, landing at Duke. He discusses his involvement with the Institute of Nuclear Theory at the University of Washington, as well as his work at Brookhaven over the years. Müller recalls the pros and cons of the administrative side of academia, which he experienced as the Chair of the Faculty of Physics and then Dean of the Faculty of Natural Sciences at Duke. The interview concludes with Müller’s reflections on winning the Feshbach Prize and his predictions for the future of theoretical nuclear physics.

Interview with Savas Dimopoulos, Professor of Physics at Stanford University. The interview begins with Dimopoulos reflecting on how the pandemic has affected his research, and he gives his initial impressions on the g-2 muon anomaly experiment at Fermilab. He discusses the push and pull between theory and experimentation when searching for physics beyond the Standard Model. Dimopoulos then recounts his early childhood in Turkey, where his family was part of the Greek minority. Due to ethnic tensions, he fled with his family to Athens as refugees. Dimopoulos remembers his early exposure to math and physics and being torn between the two. He describes moving to the US at age 18 for his undergraduate studies at University of Houston. Dimopoulos then recounts his inclination toward theory and his acceptance at University of Chicago to pursue his graduate studies under Yoichiro Nambu. He discusses his post-doctoral appointment at Columbia which then led to an offer from Stanford. He explains his research in baryogenesis and technicolor, as well as his brief time at Harvard with Howard Georgi. Dimopoulos talks about his return to Stanford, his work at CERN, and his research on large extra dimensions with Dvali and Arkani-Hamed. He concludes the interview with predictions for the future of physics beyond the Standard Model.

Interview with A.J. Stewart Smith, the Class of 1909 Professor of Physics, emeritus, at Princeton University, who also served as the university vice president for the Princeton Plasma Physics Laboratory. Smith begins the interview with an overview of his affiliations with SNOLAB, CERN, and Italian Nuclear and Particle Physics. He recaps the effects of the pandemic on experimental particle physics. Smith then summarizes his family history and his childhood in Canada, where he became interested in the sciences in high school. Smith recalls his undergraduate studies in physics at University of British Columbia, where he also earned a master’s degree, as well as his decision to pursue a PhD at Princeton. He describes working on the Princeton-Penn Accelerator with his advisor Pierre Piroue, and the subsequent offer of a fellowship at DESY working with Sam Ting on QED. Smith recounts his move back to Princeton to join the faculty, and he describes the “bipartisanship” between experimentalists and theorists at the time. He discusses the origins of the Chicago-Princeton collaboration at Fermilab, his involvement with E-787 experiment at Brookhaven, and his time as technical coordinator and spokesperson for the BaBar experiment. The interview concludes with Smith’s recollections of his time as Princeton’s first dean of research, as well as his reflections on times when theory has led experimentation, and vice versa.

Interview with Daniel R. Marlow, Evans Crawford Class of 1911 Professor of Physics, at Princeton University. Marlow recounts his childhood in Ontario and his father’s military appointment which brought his family to the United States when he was fourteen. He describes his undergraduate experience at Carnegie Mellon and the considerations that compelled him to remain for his graduate work in physics. Marlow describes his thesis research under the direction of Peter Barnes and his research visits to Los Alamos, Brookhaven, and JLab, and he surveys the theoretical advances that were relevant to his experimental work. He explains his decision to stay at CMU as a postdoctoral researcher and as an assistant professor, and he describes his interests which straddled the boundary between particle physics and nuclear physics. Marlow describes the opportunities leading to his faculty appointment at Princeton by way of the research in k+ and pi+nu nu-bar experiments at CERN. He discusses his involvement in planning for the SSC, and how the Gem collaboration was designed to find the Higgs and supersymmetry before the LHC. Marlow discusses the e787 experiment and the lesson gained that rare kaon decay experiments are more difficult than they appear at first glance. Marlow describes the origins of the Belle project in Japan at KEK and its relationship to BaBar, and he explains how finding the Higgs was the capstone to the Standard Model. He surveys the current state of play in experimental particle physics and why he encourages students to follow their interests without overly analyzing future trends in the field. At the end of the interview, Marlow describes his current interest in studying displaced vertices and long-lived particle searches, and he muses that toward the end of his career, he wants to become more of a “graduate student” so that he can focus more exclusively on the physics that is most compelling to him.

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.

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.

Interview with Sarah Demers, Horace D. Taft Associate Professor of Physics at Yale University. Demers explains her academic lineage connection to Taft, and she surveys the challenges of remote work in the pandemic. She recounts her Vermont childhood growing up in the church as the daughter of a United Methodist minister and how her family discussed the compatibility of science and religion. Demers discusses her undergraduate experience at Harvard and her early struggles with physics. She describes her relationship with Melissa Franklin and her first experiences with the CDF detector project at Fermilab. Demers explains her decision to go to the University of Rochester for graduate school where she studied under the direction of Kevin McFarland, and she describes plotting the Z boson at Fermilab. She describes her first job teaching at Roberts Wesleyan College and her subsequent appointment as part of SLAC’s team for ATLAS at CERN, where she developed an infinity for the triggers of experiments. Demers explains the opportunities that led to her faculty appointment at Yale, and she describes the interests that led to her book on physics and dance. She discusses her ongoing collaboration with ATLAS, the tenure process at Yale, and her work on Mu2e. Demers describes the “aesthetic hints” that may prove to be physics beyond the Standard Model, and she explains why the LHC can play a pivotal role in the search for dark matter. At the end of the interview, Demers discusses her current interest in tau leptons, she describes the issue of bias as a blockage to improving diversity in the field, and she reflects on the technological improvements that have propelled her field forward. 

Interview with Michael Dine, Professor of Physics at the University of California at Santa Cruz. Dine conveys his provisional excitement over the g-2 muon anomaly experiment at Fermilab and he recounts his childhood in Cincinnati. Dine discusses his undergraduate education at Johns Hopkins, his developing interests in physics, and the opportunity that led to his graduate research at Yale. He describes working under the supervision of Tom Appelquist and trying to understand the force between heavy quarks within quantum chromodynamics. Dine describes his earliest exposure to string theory and his decision to take a postdoctoral appointment at SLAC, where he worked with Jonathan Saperstein on the next order calculation of the total electron-positron cross section. He discusses Lenny Susskind’s work on Technicolor and his subsequent appointment at the Institute for Advanced Study, his close collaboration with Willy Fischler, and the excitement surrounding supersymmetry at the time. Dine describes the impact made by Ed Witten when he arrived in Princeton and he discusses the origins of axion-dark matter research. He discusses his first faculty position at City College in New York and his reaction to the “string revolution” of 1984 and AdS/CFT a few years later. Dine explains his decision to move to UC Santa Cruz and his burgeoning interest in cosmology, he reflects on when his research focused to physics beyond the Standard Model, and he explains why it is possible to decouple the expectation that supersymmetry must be detected at the LHC. He explains why string theory is making strides toward experimental verifiability, and he reflects on the utility of being a theorist. At the end of the interview, Dine emphasizes his optimism about the axion as a dark matter candidate and why the field is moving steadily toward a greater understanding of physics at both the largest and smallest scales.