Instantons from Low Energy String Actions

M. Saffin, P. and Mazumdar, Anupam and J. Copeland, E. (1998) Instantons from Low Energy String Actions. Physics Letters B, 435 (1-2). pp. 19-24. ISSN 0370-2693

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Abstract

We look for instanton solutions in a class of two scalar field gravity models, which includes the low energy string action in four dimensions. In models where the matter field has a potential with a false vacuum, we find that non-singular instantons exist as long as the Dilaton field found in string theory has a potential with a minimum, and provide an example of such an instanton. The class of singular instanton solutions are also examined, and we find that depending on the parameter values, the volume factor of the Euclidean region does not always vanish fast enough at the singularity to make the action finite.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Additional Information:
revtex 6 pages with 3 figures. Minor numerical correction made
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
63459
Deposited By:
Deposited On:
15 May 2013 08:48
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:23