Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-24
Eur.Phys.J.C52:451-457,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 7 figures, typos are corrected, one graph have been added in figure 5
Scientific paper
10.1140/epjc/s10052-007-0371-y
The phenomenological investigation of noncommutative space-time in the laboratory frame are presented. We formulate the apparent time variation of noncommutativity parameter $\theta_{\mu\nu}$ in the laboratory frame due to the earth's rotation. Furthermore, in the noncommutative QED, we discuss how to probe the electric-like component $\overrightarrow{\theta_{E}}=(\theta_{01},\theta_{02},\theta_{03})$ by the process $e^-e^+\to\gamma\gamma$ at future $e^-e^+$ linear collider. We may determine the magnitude and the direction of $\overrightarrow{\theta_{E}}$ by detailed study of the apparent time variation of total cross section. In case of us observing no signal, the upper limit on the magnitude of $\overrightarrow{\theta_E^{}}$ can be determined independently of its direction.
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