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Sheldon Glashow
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Sheldon Glashow
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{{Short description|American theoretical physicist}}- the content below is remote from Wikipedia
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Birth and education
Sheldon Glashow was born on December 5, 1932, in New York City, to Jewish immigrants from Russia, Bella (née Rubin) and Lewis Gluchovsky, a plumber.Sheldon Glashow â Britannica Encyclopedia. Britannica.com. Retrieved on 2012-07-27. He graduated from Bronx High School of Science in 1950. Glashow was in the same graduating class as Steven Weinberg, whose own research, independent of Glashow's, would result in Glashow, Weinberg, and Abdus Salam sharing the 1979 Nobel Prize in Physics (see below).Glashow's autobiography {{Webarchive|url=https://web.archive.org/web/20071012223643weblink |date=2007-10-12 }}. Nobelprize.org. Retrieved on 2012-07-27. Glashow received a Bachelor of Arts degree from Cornell University in 1954 and a PhD degree in physics from Harvard University in 1959 under Nobel-laureate physicist Julian Schwinger. Afterwards, Glashow became a NSF fellow at NORDITA and met Murray Gell-Mann, who convinced him to become a research fellow at the California Institute of Technology.WEB, The Nobel Prize in Physics 1979,weblink 2022-08-11, NobelPrize.org, en-US, Glashow then became an assistant professor at Stanford University before joining the University of California, Berkeley where he was an associate professor from 1962 to 1966.WEB, Glashow, Sheldon L.,weblink 2022-08-11, history.aip.org, Sheldon Glashow {{Webarchive|url=https://web.archive.org/web/20140803044944weblink |date=2014-08-03 }}. Jewishvirtuallibrary.org. Retrieved on 2012-07-27. He joined the Harvard physics department as a professor in 1966, and was named Eugene Higgins Professor of Physics in 1979; he became emeritus in 2000. Glashow has been a visiting scientist at CERN, and professor at Aix-Marseille University, MIT, Brookhaven Laboratory, Texas A&M, the University of Houston, and Boston University.Research
In 1961,JOURNAL, Glashow, Sheldon L., February 1961, Partial-symmetries of weak interactions,weblink Nuclear Physics, en, 22, 4, 579â588, 10.1016/0029-5582(61)90469-2, 1961NucPh..22..579G, 2020-12-02, 2021-02-27,weblink live, Glashow extended electroweak unification models due to Schwinger by including a short range neutral current, the Z0. The resulting symmetry structure that Glashow proposed, SU(2) à U(1), forms the basis of the accepted theory of the electroweak interactions. For this discovery, Glashow along with Steven Weinberg and Abdus Salam, was awarded the 1979 Nobel Prize in Physics.In collaboration with James Bjorken, Glashow was the first to predict a fourth quark, the charm quark, in 1964. This was at a time when 4 leptons had been discovered but only 3 quarks proposed. The development of their work in 1970, the GIM mechanism showed that the two quark pairs: (d.s), (u,c), would largely cancel out flavor changing neutral currents, which had been observed experimentally at far lower levels than theoretically predicted on the basis of 3 quarks only. The prediction of the charm quark also removed a technical disaster for any quantum field theory with unequal numbers of quarks and leptons â an anomaly â where classical field theory symmetries fail to carry over into the quantum theory.In 1973,H. Georgi, S.L. Glashow, "Unity of All Elementary Particle Forces", Phys. Rev. Lett. 32 (1974) 438weblink Glashow and Howard Georgi proposed the first grand unified theory. They discovered how to fit the gauge forces in the standard model into an SU(5) Lie group group, and the quarks and leptons into two simple representations. Their theory qualitatively predicted the general pattern of coupling constant running, with plausible assumptions, it gave rough mass ratio values between third generation leptons and quarks, and it was the first indication that the law of Baryon number is inexact, that the proton is unstable. This work was the foundation for all future unifying work.Glashow shared the 1977 J. Robert Oppenheimer Memorial Prize with Feza Gürsey.BOOK, Winners, the blue ribbon encyclopedia of awards,weblink registration, Walter, Claire, 1982, 438, Facts on File Inc., 9780871963864, JOURNAL, Gürsey and Glashow share Oppenheimer memorial, Physics Today, 30, 5, 95, American Institute of Physics, May 1977, 10.1063/1.3037556,Criticism of superstring theory
Glashow is a skeptic of superstring theory due to its lack of experimentally testable predictions. He had campaigned to keep string theorists out of the Harvard physics department, though the campaign failed.Jim Holt (2006-10-02), "Unstrung" {{Webarchive|url=https://web.archive.org/web/20110606234307weblink |date=2011-06-06 }}, The New Yorker. Retrieved on 2012-07-27. About ten minutes into "String's the Thing", the second episode of The Elegant Universe TV series, he describes superstring theory as a discipline distinct from physics, saying "...you may call it a tumor, if you will..."."[T]here ain't no experiment that could be done nor is there any observation that could be made that would say, `You guys are wrong.' The theory is safe, permanently safe." He also said, "Is this a theory of Physics or Philosophy? I ask you" NOVA interview {{Webarchive|url=https://web.archive.org/web/20110830121816weblink |date=2011-08-30 }}(File:PY 101 Energy.jpg|thumb|375px|Professor Glashow's KHC PY 101 Energy class, at Boston University's Kilachand Honors College (Spring 2011))Personal life
Glashow is married to Joan Shirley Alexander. They have four children. Lynn Margulis was Joan's sister, making Carl Sagan his former brother-in-law. Daniel Kleitman, who was another doctoral student of Julian Schwinger, is also his brother-in-law, through Joan's other sister, Sharon.In 2003, he was one of 22 Nobel Laureates who signed the Humanist Manifesto.WEB,weblink Notable Signers, American Humanist Association, Humanism and Its Aspirations, October 2, 2012, October 5, 2012,weblink" title="web.archive.org/web/20121005105825weblink">weblink dead, Glashow has described himself as a "practising atheist" and a Democrat.Sheldon Glashow, Nobel Prize in Physics for the Electroweak Theory . La Vanguardia, 20 June 2017, raed.academy/wp-content/uploads/2017/06/Sheldon-Lee-Glashow-contraLVeng.pdf.Glashow is one of the 20 American recipients of the Nobel Prize in Physics to sign a letter addressed to President George W. Bush in May 2008, urging him to "reverse the damage done to basic science research in the Fiscal Year 2008 Omnibus Appropriations Bill" by requesting additional emergency funding for the Department of Energyâs Office of Science, the National Science Foundation, and the National Institute of Standards and Technology.WEB, A Letter from America's Physics Nobel Laureates,weblink 2020-05-30, 2021-10-30,weblink live,Works
- The Charm of Physics (1991) {{ISBN|0-88318-708-6}}
- From Alchemy to Quarks: The Study of Physics as a Liberal Art (1994) {{ISBN|0-534-16656-3}}
- Interactions: A Journey Through the Mind of a Particle Physicist and the Matter of this World (1988) {{ISBN|0-446-51315-6}}
- First Workshop on Grand Unification: New England Center, University of New Hampshire, April 10â12, 1980 edited with Paul H. Frampton and Asim Yildiz (1980) {{ISBN|0-915692-31-7}}
- Third Workshop on Grand Unification, University of North Carolina, Chapel Hill, April 15â17, 1982 edited with Paul H. Frampton and Hendrik van Dam (1982) {{ISBN|3-7643-3105-4}}
- "Desperately Seeking Superstrings?" with Paul Ginsparg in Riffing on Strings: Creative Writing Inspired by String Theory (2008) {{ISBN|978-0-9802114-0-5}}
Awards and honors
- J. Robert Oppenheimer Memorial Prize (1977)
- Nobel Prize in Physics (1979)
- Golden Plate Award of the American Academy of Achievement (1980)WEB, Golden Plate Awardees of the American Academy of Achievement, www.achievement.org, American Academy of Achievement,weblink 2020-07-19, 2016-12-15,weblink live,
- Member of the American Philosophical Society (2002)WEB, APS Member History,weblink 2021-07-08, search.amphilsoc.org, 2021-07-09,weblink live,
See also
References
{{reflist}}External links
{{Commons category}}- {{MathGenealogy |id=105794 |name=Sheldon Lee Glashow }}
- {{Nobelprize}} including the Nobel Lecture, December 8, 1979 Towards a Unified Theory â Threads in a Tapestry
- Sheldon Lee Glashow on www.nobel-winners.com
- Interview with Glashow on Superstrings
- weblink" title="web.archive.org/web/20051224133219weblink">Contributions to the theory of the unified weak and electromagnetic interaction between elementary particles, including inter alia the prediction of the weak neutral current.
- Sheldon Glashow Boston University Physics Department
- Sheldon Glashow Photos{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}
- Interview with Glashow About Contemporary Physics and Winning the Nobel Prize {{Webarchive|url=https://web.archive.org/web/20121002024844weblink |date=2012-10-02 }}
- {{INSPIRE-HEP author}}
- {{Imdb name|nm6007857}}
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