bj’s Fermilab Years
An evocation of J. D. Bjorken's decade at Fermilab, prepared for the SLAC Symposium, "Remembering Bj," November 9, 2024.
Engineering topics
Publications and source records attributed to Quigg, Chris.
An evocation of J. D. Bjorken's decade at Fermilab, prepared for the SLAC Symposium, "Remembering Bj," November 9, 2024.
Lecture presented at the 2024 SLAC Summer Institute commemoration, \emph{November Revolution.}
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Peter Ware Higgs, a particle physics icon, died on 8 April at the age of 94. Higgs illuminated the path to understanding how exact symmetries obeyed by the laws of nature might be masked by an asymmetric ground state that is an outcome of symmetrical laws. In 1964, he posited that a field filling all of space could be the agent that hides the underlying symmetries of the fundamental interactions. Additionally, when excited, the field reveals itself as a massive unstable particle. In the context of a joint theory of electromagnetism and the weak interaction, that particle—popularly called the Higgs boson—emerged as the keystone of the standard model of particle physics. The decades-long search for the boson engaged the passion of thousands of scientists and engineers and stirred the curiosity of the public the world over.
What kind of scientist was J. Robert Oppenheimer? Christopher Nolan's film has prompted several one-line pronouncements. “He was no Einstein”—which leaves plenty of room near the top; “He never won a Nobel Prize”—a narrow metric, if undeniably true; “He would have had a Nobel had he lived to see X or Y discovered”—we will never know. Oppenheimer's legacy in research merits a closer look.
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A public lecture is a performance, and it is also an invitation to conversation. A lively conversation—especially when one person does most of the talking—requires that the speaker have something to say. Further, a memorable performance requires assiduous preparation. I touch on a number of important elements: preparing the scene and eliminating barriers between you and the audience... engaging your listeners with a narrative arc... the uses of the minute particular... tension and resolution, surprise and drama... experiments and demonstrations, specimens and souvenirs.... showing yourself, and your passion.
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In the summer of 1918, German mathematician Emmy Noether published the two-part theorem that now bears her name, establishing profound connections between symmetries and conservation laws and between symmetries and interactions. These insights exert a pervasive influence in physics; they give meaning to conservation laws that elevates them beyond useful empirical rules, and they underlie all our theories of the fundamental interactions. In Noether's later career, her papers, lectures, and personal interactions with students and colleagues drove the development of abstract algebra, establishing her in the pantheon of twentieth-century mathematicians.
Sheldon Stone (Feb. 14, 1946 – Oct. 6, 2021), distinguished professor of physics at Syracuse University, passed away in early October at the age of 75. He graduated from Brooklyn College in 1967 and earned his doctorate at the University of Rochester in 1972 under the guidance of Thomas Ferbel. He devoted most of his career to the study of particles containing charm and bottom quarks.
A compendium for outsiders.