Journal article 852 views
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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DOI (Published version): 10.1103/PhysRevD.64.085016
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...
| Published in: | Physical Review D |
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| ISSN: | 0556-2821 1089-4918 |
| Published: |
2001
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| Online Access: |
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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 |
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| College: |
Faculty of Science and Engineering |
| Issue: |
8 |
| Start Page: |
085016 |