Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-06-21
Nucl.Phys. B482 (1996) 105-118
Physics
High Energy Physics
High Energy Physics - Theory
latex, 16 pages; version to appear in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(96)00540-8
We argue for the existence of phase transitions in $3+1$ dimensions associated with the appearance of tensionless strings. The massless spectrum of this theory does not contain a graviton: it consists of one $N=2$ vector multiplet and one linear multiplet, in agreement with the light-cone analysis of the Green-Schwarz string in $3+1$ dimensions. In M-theory the string decoupled from gravity arises when two 5-branes intersect over a three-dimensional hyperplane. The two 5-branes may be connected by a 2-brane, whose boundary becomes a tensionless string with $N=2$ supersymmetry in $3+1$ dimensions. Non-critical strings on the intersection may also come from dynamical 5-branes intersecting the two 5-branes over a string and wrapped over a four-torus. The near-extremal entropy of the intersecting 5-branes is explained by the non-critical strings originating from the wrapped 5-branes.
Hanany Amihay
Klebanov Igor R.
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