Probe noncommutative space-time scale using γ γ → Z at ILC
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
640
Journal Issue
1-2
Pages
28-31
Date Issued
2006
Author(s)
Li, X.-Q.
Abstract
In the standard model production of on-shell Z boson at a photon collider (or Z decays into γγ) is strictly forbidden by angular momentum conservation and Bose statistics (the Yang's theorem). In the standard model with noncommutative space-time this process can occur. Therefore this process provides an important probe for the noncommutative space-time. The γγ collision at the ILC by laser backscattering of the electron and positron beams offers an ideal place to carry out such a study. Assuming an integrated luminosity of 500 fb-1, we show that the constraint which can be achieved on Γ (Z → γ γ) is three to four orders of magnitude better than the current bound of 5.2 × 10-5 GeV. The noncommutative scale can be probed up to a few TeVs. © 2006 Elsevier B.V. All rights reserved.
Type
journal article