### Abstract

We perform the two-loop level renormalization of quantum gravity in 2 + ∈ dimensions. We work in the background gauge whose manifest covariance enables us to use the short distance expansion of the Green's functions. We explicitly show that the theory is renormalizable to the two-loop level in our formalism. We further make a physical prediction for the scaling relation between the gravitational coupling constant and the cosmological constant which is expected to hold at the short distance fixed point of the renormalization group. It is found that the two-loop level calculation is necessary to determine the scaling exponent to the leading order in ∈.

Original language | English |
---|---|

Pages (from-to) | 427-458 |

Number of pages | 32 |

Journal | Nuclear Physics, Section B |

Volume | 491 |

Issue number | 1-2 |

Publication status | Published - Apr 28 1997 |

Externally published | Yes |

### Fingerprint

### Keywords

- Quantum gravity near two dimensions
- Scaling exponents
- Two-loop renormalization

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Nuclear Physics, Section B*,

*491*(1-2), 427-458.

**Two-loop prediction for scaling exponents in (2 + ∈)-dimensional quantum gravity.** / Aida, Toshiaki; Kitazawa, Yoshihisa.

Research output: Contribution to journal › Article

*Nuclear Physics, Section B*, vol. 491, no. 1-2, pp. 427-458.

}

TY - JOUR

T1 - Two-loop prediction for scaling exponents in (2 + ∈)-dimensional quantum gravity

AU - Aida, Toshiaki

AU - Kitazawa, Yoshihisa

PY - 1997/4/28

Y1 - 1997/4/28

N2 - We perform the two-loop level renormalization of quantum gravity in 2 + ∈ dimensions. We work in the background gauge whose manifest covariance enables us to use the short distance expansion of the Green's functions. We explicitly show that the theory is renormalizable to the two-loop level in our formalism. We further make a physical prediction for the scaling relation between the gravitational coupling constant and the cosmological constant which is expected to hold at the short distance fixed point of the renormalization group. It is found that the two-loop level calculation is necessary to determine the scaling exponent to the leading order in ∈.

AB - We perform the two-loop level renormalization of quantum gravity in 2 + ∈ dimensions. We work in the background gauge whose manifest covariance enables us to use the short distance expansion of the Green's functions. We explicitly show that the theory is renormalizable to the two-loop level in our formalism. We further make a physical prediction for the scaling relation between the gravitational coupling constant and the cosmological constant which is expected to hold at the short distance fixed point of the renormalization group. It is found that the two-loop level calculation is necessary to determine the scaling exponent to the leading order in ∈.

KW - Quantum gravity near two dimensions

KW - Scaling exponents

KW - Two-loop renormalization

UR - http://www.scopus.com/inward/record.url?scp=0031589067&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031589067&partnerID=8YFLogxK

M3 - Article

VL - 491

SP - 427

EP - 458

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

IS - 1-2

ER -