Neutrino dipole moments and charge radii in noncommutative space-time

Details Neutrino dipole moments and charge radii in noncommutative space-time Neutrino dipole moments and charge radii in noncommutative space-time

2003-02-21

arxiv.org/abs/hep-th/0302175v3

Eur.Phys.J. C37 (2004) 123-128

Physics

High Energy Physics

High Energy Physics - Theory

6 pages; v2: references added, major revisions, much higher bound on NC scale obtained; v3: electromagnetic properties of neut

Scientific paper

In this paper we obtain a bound $\Lambda_{\rm NC} < 150$ TeV on the scale of space-time noncommutativity considering photon-neutrino interactions. We compute "star-dipole moments" and "star-charge radii" originating from space-time noncommutativity and compare them with the dipole moments calculated in the neutrino-mass extended standard model (SM). The computation depends on the nature of the neutrinos, Dirac versus Majorana, their mass and the energy scale. We focus on Majorana neutrinos. The "star-charge radius" is found to be $r^* = \sqrt{|< r^2_{\nu}>_{\rm NC}|} =|3\sum_{i=1}^3 ({\theta}^{0i})^2|^{1/4} < 1.6 \times 10^{-19}$ cm at $\Lambda_{\rm NC} = 150$ TeV.

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