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Noncommutative gauge theories and the cosmological constant / Rodolfo Russo, Adi Armoni

Physical Review D, Volume: "D64", Issue: 8, Start page: 085016

Swansea University Author: Adi Armoni

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Abstract

We discuss the issue of the cosmological constant in non-commutative non-supersymmetric gauge theories. In particular, in orbifold field theories non-commutativity acts as a UV cut-off. We suggest that in these theories quantum corrections give rise to a vacuum energy \rho, that is controlled by the...

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Published in: Physical Review D
ISSN: 0556-2821 1089-4918
Published: 2001
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URI: https://cronfa.swan.ac.uk/Record/cronfa28678
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Abstract: We discuss the issue of the cosmological constant in non-commutative non-supersymmetric gauge theories. In particular, in orbifold field theories non-commutativity acts as a UV cut-off. We suggest that in these theories quantum corrections give rise to a vacuum energy \rho, that is controlled by the non-commutativity parameter \theta, \rho ~ 1/theta^2 (only a soft logarithmic dependence on the Planck scale survives). We demonstrate our claim in a two-loop computation in field theory and by certain higher loop examples. Based on general expressions from string theory, we suggest that the vacuum energy is controlled by non-commutativity to all orders in perturbation
College: College of Science
Issue: 8
Start Page: 085016