Stability of false vacuum in supersymmetric theories with cosmic strings

Kumar, Brijesh; Yajnik, Urjit A.

doi:10.1103/physrevd.79.065001

Cited by 19 publications

(12 citation statements)

References 35 publications

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“…In a recent paper [21], we had emphasized that it is not sufficient to study the stability of supersymmetry breaking vacua in terms of their translation invariant form alone. In general, topological defects can form in the evolution of the early universe [22].…”

Section: Introductionmentioning

confidence: 99%

Graceful exit via monopoles in a theory with O'Raifeartaigh type supersymmetry breaking

Kumar

Yajnik

2010

Nuclear Physics B

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We study the stability of supersymmetry breaking metastable vacua and supersymmetric vacua in the presence of solitons. The metastable vacua of supersymmetric QCD and those found elsewhere such as in models based on the SU(5) grand unified group support the existence of topological solitons. The vacua containing such topological defects can become unstable against decay into lower energy configurations. We show for a specific model that a finite region of the available parameter space of couplings becomes disallowed due to the presence of monopoles. In a manner similar to previous studies based on cosmic strings, it is shown that soliton solutions arising in supersymmetric theories can put constraints on the range of allowed values of the couplings arising in the theories. Implications for cosmology are discussed.

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Section: Introductionmentioning

confidence: 99%

Graceful exit via monopoles in a theory with O'Raifeartaigh type supersymmetry breaking

Kumar

Yajnik

2010

Nuclear Physics B

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“…Some relevant studies have been carried out in Refs. [36,37]. In this paper, we study in detail the structure of the R-string/tube solution in SUSY models.…”

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confidence: 99%

Cosmic R-string, R-tube and vacuum instability

Eto

Hamada

Kamada

et al. 2013

J. High Energ. Phys.

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We show that a cosmic string associated with spontaneous U(1) R symmetry breaking gives a constraint for supersymmetric model building. In some models, the string can be viewed as a tube-like domain wall with a winding number interpolating a false vacuum and a true vacuum. Such string causes inhomogeneous decay of the false vacuum to the true vacuum via rapid expansion of the radius of the tube and hence its formation would be inconsistent with the present Universe. However, we demonstrate that there exist metastable solutions which do not expand rapidly. Furthermore, when the true vacua are degenerate, the structure inside the tube becomes involved. As an example, we show a "bamboo"-like solution, which suggests a possibility observing an information of true vacua from outside of the tube through the shape and the tension of the tube.

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“…In [10], we investigated the various aspects of the R-tube and found that there can be light unstable modes. In these reasons, a gauge mediation model with spontaneously broken R-symmetry is an ideal example to demonstrate implications of such complicated vacua in a realistic situation (see [39,40] for relevant earlier works).…”

Section: Jhep05(2013)091mentioning

confidence: 99%