Abstract
Among the physicists’ attempts to understand the fundamental structure of matter have been the attempts to: (i) find the ultimate constituents of matter; and (ii) to attain a unification of the forces responsible for the interactions among them. Recent progress in these attempts has led to energy scales which can not conceivably be attained in laboratory experiments, but which would not only be present, but would play an important role in the earliest stages of the big bang model of the Universe. We are talking here of an energy scale E ~ 1015 GeV, the corresponding temperature, T, being ~ 1028 K relevant to times t ~ 10-35 sec. after the big bang. Also, many of the ideas of contemporary particle physics lead to dramatic consequences when applied to the very early universe. It is such interfaces between particle physics and cosmology which are reviewed in this lecture. I shall discuss three such interfaces: (i) the generation of the baryon number of the Universe; (ii) a limit on the number of kinds of neutrinos and therefore on the number of quark-lepton generations (if we believe in quark-lepton symmetry); and (iii) the neutrino mass.
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References
The following is a selected list of review articles where original references to the literature can also be found. A. For quarks and leptons, their interactions and electro-weak unification, see
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Riazuddin (1984). Interfaces between Particle Physics and Cosmology. In: Khan, A.M., Riazuddin, S., Qadir, A., Qazi, M.N. (eds) Physics and Contemporary Needs. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4724-8_21
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DOI: https://doi.org/10.1007/978-1-4684-4724-8_21
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