## Abstract

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 4-torus. The near-extremal entropy of the intersecting 5-branes is explained by the non-critical strings originating from the wrapped 5-branes.

Original language | English (US) |
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Pages (from-to) | 105-118 |

Number of pages | 14 |

Journal | Nuclear Physics B |

Volume | 482 |

Issue number | 1-2 |

DOIs | |

State | Published - Dec 23 1996 |

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics