Phys. Rev. Lett. 87, 251302 (2001) [4 pages]Estimate of the Primordial Magnetic Field Helicity |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
Tanmay Vachaspati
Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
and Department of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106-7079
Received 22 January 2001; revised 2 October 2001; published 28 November 2001
Electroweak baryogenesis proceeds via changes in the non-Abelian Chern-Simons number. It is argued that these changes generate a primordial magnetic field with left-handed helicity. The helicity density of the primordial magnetic field today is then estimated to be given by ∼102nb, where nb∼10-6/cm3 is the present cosmological baryon number density. With certain assumptions about the inverse cascade we find that the field strength at recombination is ∼10-13 G on a comoving coherence scale ∼0.1 pc.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e251302
DOI: 10.1103/PhysRevLett.87.251302
PACS: 98.62.En, 98.80.Cq
[ Abstract | Previous article | Next article | Issue 25 ]
About PROLA | Terms and Conditions | Subscriptions | Search | Help
Content in PROLA © 2008 by The American Physical Society All rights reserved. PROLA™ is a trademark of The American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement.