Steven Weinberg

Steven Weinberg was born in 1933 in New York City. His parents were Jewish immigrants. He graduated from Bronx High School of Science in 1950. He was in the same graduating class as Sheldon Glashow, whose own research, independent of Weinberg's, would result in their (and Abdus Salam) sharing the 1979 Nobel in Physics (see below).

Weinberg married Louise Weinberg in 1954 and has one daughter, Elizabeth.

After completing his PhD, Weinberg worked as a postdoctoral researcher at Columbia University (1957–1959) and University of California, Berkeley (1959) and then he was promoted to faculty at Berkeley (1960–1966). He did research in a variety of topics of particle physics, such as the high Energy behavior of quantum field theory, symmetry breaking, pion scattering, infrared photons and quantum gravity. It was also during this time that he developed the approach to quantum field theory that is described in the first chapters of his book The Quantum Theory of Fields and started to write his textbook Gravitation and Cosmology. Both textbooks are among the most influential texts in the scientific community in their subjects.

In 1966, Weinberg left Berkeley and accepted a lecturer position at Harvard. In 1967 he was a visiting professor at MIT. It was in that year at MIT that Weinberg proposed his model of unification of electromagnetism and of nuclear weak forces (such as those involved in beta-decay and kaon-decay), with the masses of the force-carriers of the weak part of the interaction being explained by spontaneous symmetry breaking. One of its fundamental aspects was the prediction of the existence of the Higgs boson. Weinberg's model, now known as the electroweak unification theory, had the same symmetry structure as that proposed by Glashow in 1961: hence both Models included the then-unknown weak interaction mechanism between leptons, known as neutral current and mediated by the Z boson. The 1973 experimental discovery of weak neutral currents (mediated by this Z boson) was one verification of the electroweak unification. The paper by Weinberg in which he presented this theory is one of the most cited works ever in high Energy physics.

In the years after 1967, the full Standard Model of elementary particle theory was developed through the work of many contributors. In it, the weak and electromagnetic interactions already unified by the work of Weinberg, Abdus Salam and Sheldon Glashow, are made consistent with a theory of the strong interactions between quarks, in one overarching theory. In 1973 Weinberg proposed a modification of the Standard Model which did not contain that model's fundamental Higgs boson.

Weinberg became Eugene Higgins Professor of Physics at Harvard University in 1973.

In 1979, some six years after the experimental discovery of the neutral currents – i.e. the discovery of the inferred existence of the Z boson – but following the 1978 experimental discovery of the theory's predicted amount of parity violation due to Z bosons' mixing with electromagnetic interactions, Weinberg was awarded the Nobel Prize in Physics, together with Sheldon Glashow, and Abdus Salam who had independently proposed a theory of electroweak unification based on spontaneous symmetry breaking.

In 1982 Weinberg moved to the University of Texas at Austin as the Jack S. Josey-Welch Foundation Regents Chair in Science and founded the Theory Group of the Physics Department.

Weinberg is an atheist. Weinberg stated his views on religion in 1999:

There is current (2008) interest in Weinberg's 1976 proposal of the existence of new strong interactions – a proposal dubbed "Technicolor" by Leonard Susskind – because of its chance of being observed in the LHC as an explanation of the hierarchy Problem.

Although still teaching physics, he has, in recent years, turned his hand to the history of science, efforts that culminated in To Explain the World: The Discovery of Modern Science (2015). A hostile review in the Wall Street Journal by Steven Shapin attracted a number of commentaries, a response by Weinberg, and an exchange of views between Weinberg and Arthur Silverstein in the NYRB in February 2016.

In 2016, he became a default figurehead for faculty and students opposed to a new law that allowed the carrying of concealed guns in UT classrooms. Weinberg announced that he would be prohibiting guns from his classes, and said he would stand by his decision to violate university regulations in this matter even if faced with a lawsuit.