Abstract: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 met… Show more
“…The transition proceeds via a domain wall D5-brane wrapping over the A 1 , A 2 and C cycles at the same point of our spacetime. The decay rate is calculated by using the Euclidean version of the Dirac bubble is given by 8) while X I (I = 4, 5, 6) are filling the A 1 , A 2 and C cycles. During the phase transition, the baryon forms a bound state with the domain wall D5-brane and induces the magnetic flux on the wall.…”
Section: The Decay Ratementioning
confidence: 99%
“…The evolution of the universe (or multiverse) may be affected by their existence in that the catalysts accelerate transitions between vacua. In fact, it has been discussed in field theories that a semi-classical vacuum decay occurs from monopoles or cosmic strings [1][2][3][4] and applied to phenomenological studies of metastable vacua [5][6][7][8][9][10][11]. Moreover, recent developments of string theory compactifications suggest the existence of the landscape of vacua [12][13][14][15].…”
We consider a decay of a false vacuum in flux compactifications of type IIB string theory and study a catalytic effect for a phase transition induced by a new type of impurities. We concentrate on the large N dual of a D5-brane/anti-D5-brane system which has a rich vacuum structure. We show that D3-branes wrapping the 3-cycles can form a baryon bound state with a monopole. We find that these baryon-like objects can make the lifetime of the metastable vacuum shorter.
“…The transition proceeds via a domain wall D5-brane wrapping over the A 1 , A 2 and C cycles at the same point of our spacetime. The decay rate is calculated by using the Euclidean version of the Dirac bubble is given by 8) while X I (I = 4, 5, 6) are filling the A 1 , A 2 and C cycles. During the phase transition, the baryon forms a bound state with the domain wall D5-brane and induces the magnetic flux on the wall.…”
Section: The Decay Ratementioning
confidence: 99%
“…The evolution of the universe (or multiverse) may be affected by their existence in that the catalysts accelerate transitions between vacua. In fact, it has been discussed in field theories that a semi-classical vacuum decay occurs from monopoles or cosmic strings [1][2][3][4] and applied to phenomenological studies of metastable vacua [5][6][7][8][9][10][11]. Moreover, recent developments of string theory compactifications suggest the existence of the landscape of vacua [12][13][14][15].…”
We consider a decay of a false vacuum in flux compactifications of type IIB string theory and study a catalytic effect for a phase transition induced by a new type of impurities. We concentrate on the large N dual of a D5-brane/anti-D5-brane system which has a rich vacuum structure. We show that D3-branes wrapping the 3-cycles can form a baryon bound state with a monopole. We find that these baryon-like objects can make the lifetime of the metastable vacuum shorter.
“…Then, in [23][24][25][26][27][28][29], applications to phenomenological model building were discussed in the context of field theories. Our first paper [10] can be regarded as the first realization of this idea in string theories.…”
Abstract:We study dynamics of a cosmic string in a metastable brane configuration in Type IIA string theory. We first discuss a decay process of the cosmic string via a fuzzy brane (equivalently bubble/string bound state) by neglecting gravitational corrections in ten-dimension. We find that depending on the strength of the magnetic field induced on the bubble, the decay rate can be either larger or smaller than that of O(4) symmetric bubble. Then, we investigate gravitational corrections to the fuzzy brane by using the extremal black N S-five brane solution, which makes the lifetime of the metastable state longer.
“…1 A cosmic string associated with R-symmetry has been studied in [18][19][20][21][22]. Rich physical aspects such as instability of metastable vacua induced by the string and cosmological constraints coming from R-axion radiated by the string have been discussed.…”
Section: Review Of Aharonov-bohm Radiationmentioning
We study radiation of supersymmetric particles from an Aharonov-Bohm string associated with a discrete R-symmetry. Radiation of the lightest supersymmetric particle, when combined with the observed dark matter density, imposes constraints on the string tension or the freeze-out temperature of the particle. We also calculate the amplitude for Aharonov-Bohm radiation of massive spin 3/2 particles.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.