Ohio State Department of Physics

HEP/Astro Seminar - Wednesday, 2 April 2003

Early Universe QCD Chiral Phase Transition and Cosmic Microwave Background Correlations

Prof. Leonard Kisslinger (Carnegie Mellon University)


There are now strong arguments that the QCD phase transition is first order, and that the hadronic phase of the universe was formed with nucleation of few large bubbles. Starting from the QCD Lagrangian, an instanton-inspired model is used to study bubble collisions in 1+1 dimensions. An interior gluonic structure is found after the collision, much like the classical theory of bubble collisions in which an interior bubble wall is found after the merging of two bubble. Based on the instanton model it is shown that the surface tension of the bubbles is in agreement with lattice gauge calculations. The interior gluonic wall leads to an interior magnetic wall. It is shown that such a magnetic structure could lead to CMBR polarization correlations distinct from inflationary models, and that observable temperature correlations could arise from gravitational effects. Finally our work in progress on the Electroweak phase transition, occuring at an earlier time, is discussed.

15:30, Smith Lab 4079

Last updated 27 March 2003, Matthew Wingate

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