Non-Commutative Gauge Theories and the Cosmological Constant - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2001

Non-Commutative Gauge Theories and the Cosmological Constant

Résumé

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 theory.

Dates et versions

hal-00010115 , version 1 (09-10-2005)

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Citer

Adi Armoni, Rodolfo Russo. Non-Commutative Gauge Theories and the Cosmological Constant. Physical Review D, 2001, 64, pp.085016. ⟨hal-00010115⟩
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