7 research outputs found
Spacetime and vacuum as seen from Moscow
An extended text of the talk given at the conference ``2001: A Spacetime
Odyssey'', to be published in the Proceedings of the Inaugural Conference of
the Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor,
21-25 May 2001, M.J. Duff and J.T. Liu eds., World Scientific, Singapore, 2002;
and of Historical Lecture ``Vacuum as seen from Moscow'' at the CERN Summer
School, 10 August, 2001. Contents: Introduction; Pomeranchuk on vacuum; Landau
on parity, P, and combined parity, CP; Search and discovery of ; "Mirror world"; Zeldovich and cosmological term; QCD vacuum
condensates; Sakharov and baryonic asymmetry of the universe, BAU; Kirzhnits
and phase transitions; Vacuum domain walls; Monopoles, strings, instantons, and
sphalerons; False vacuum; Inflation; Brane and Bulk; Acknowledgments;
References.Comment: 17 pages, 2 figure
One-Loop Renormalization of a Self-Interacting Scalar Field in Nonsimply Connected Spacetimes
Using the effective potential, we study the one-loop renormalization of a
massive self-interacting scalar field at finite temperature in flat manifolds
with one or more compactified spatial dimensions. We prove that, owing to the
compactification and finite temperature, the renormalized physical parameters
of the theory (mass and coupling constant) acquire thermal and topological
contributions. In the case of one compactified spatial dimension at finite
temperature, we find that the corrections to the mass are positive, but those
to the coupling constant are negative. We discuss the possibility of
triviality, i.e. that the renormalized coupling constant goes to zero at some
temperature or at some radius of the compactified spatial dimension.Comment: 16 pages, plain LATE
Baryon Asymmetry of the Universe in the Standard Model
We study the interactions of quarks and antiquarks with the changing Higgs
field during the electroweak phase transition, including quantum mechanical and
some thermal effects, with the only source of CP violation being the known CKM
phase. The magnitude and sign of the predicted BAU agrees with the observed
value, with moderately optimistic assumptions about the dynamics of the phase
transition. At present uncertainties related to the dynamics of the ew phase
transition and the oversimplifications of our treatment are too great to decide
whether or not this is the correct explanation for the presence of remnant
matter in our universe, however the present work makes it clear that the
minimal standard model cannot be discounted as a contender for explaining this
phenomenon.Comment: 121pp plus 14 figures, CERN-TH.6734/93 and RU-93-11. latex. This is
an extended version of the preprint originally issued in May, 1993. It
corrects some typographical errors and has been somewhat reorganized (e.g.,
moving more to the appendices) and elaborated (especially the section on
analytic results) in order to make it more readily understandable. In
addition we include two effects which were previously neglected: mixing
due to QCD sphalerons, and a diminution of the electroweak gauge and Higgs
effects in the broken phase due to mass corrections in the 1-loop
approximation to th