Phys. Rev. Lett. 78, 2288–2291 (1997)Cosmic Strings and the String DilatonReceived 3 October 1996; published in the issue dated 24 March 1997 The existence of a dilaton (or moduli) with gravitational-strength coupling to matter imposes stringent constraints on the allowed energy scale of cosmic strings, η. In particular, superheavy gauge strings with η∼1016GeV are ruled out unless the dilaton mass mφ≳100TeV, while the currently popular value mφ∼1TeV imposes the bound η≲3×1011GeV. Some nonstandard cosmological scenarios which can avoid these constraints are pointed out. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.2288
DOI:
10.1103/PhysRevLett.78.2288
PACS:
98.80.Cq, 11.25.-w, 11.27.+d
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