Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-09-28
JHEP 0401 (2004) 037
Physics
High Energy Physics
High Energy Physics - Theory
14 pages
Scientific paper
10.1088/1126-6708/2004/01/037
We investigate some issues that are relevant for the derivation of experimental limits on the parameters of canonical noncommutative spacetimes. By analyzing a simple Wess-Zumino-type model in canonical noncommutative spacetime with soft supersymmetry breaking we explore the implications of ultraviolet supersymmetry on low-energy phenomenology. The fact that new physics in the ultraviolet can modify low-energy predictions affects significantly the derivation of limits on the noncommutativity parameters based on low-energy data. These are, in an appropriate sense here discussed, ``conditional limits''. We also find that some standard techniques for an effective low-energy description of theories with non-locality at short distance scales are only applicable in a regime where theories in canonical noncommutative spacetime lack any predictivity, because of the strong sensitivity to unknown UV physics. It appears useful to combine high-energy data, from astrophysics, with the more readily available low-energy data.
Amelino-Camelia Giovanni
Mandanici Gianluca
Yoshida Kensuke
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