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BARYOGENESIS WITHOUT BARYON NUMBER VIOLATION

SCOTT DODELSON

Gordon McKay Laboratory, Harvard University, Cambridge, MA 02138, USA

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and

LAWRENCE M. WIDROW

Department of Physics, Harvard University and Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

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https://doi.org/10.1142/S0217732390001852Cited by:11 (Source: Crossref)

Abstract

We review a new paradigm for baryogenesis in which the fundamental Lagrangian is baryon conserving [invariant under U(1)_B]. At high temperatures, U(1)_B is spontaneously broken and an excess of quarks over antiquarks of 10⁻¹⁰s (s≡entropy density) is produced. Today, U(1)_B is restored. A fundamental consequence of our assumptions is that the baryon number of the Universe is constant. If initially zero, it will be zero today. The excess baryon number produced in the quark fields is exactly compensated by antibaryon number in a weakly interacting scalar particle. We suggest that this scalar provides the mass density necessary to close the Universe.