Neutrino dipole moments and charge radii in non-commutative space-time期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Neutrino dipole moments and charge radii in non-commutative space-time

Authors:	Minkowski P Schupp P Trampeti? J

Institution:	(1) Theory Division, CERN, 1211 Geneva 23, Switzerland;(2) Institute for Theoretical Physics, University of Bern, 3012 Bern, Switzerland;(3) International University Bremen, Campus Ring 8, 28759 Bremen, Germany;(4) Theoretical Physics Division, Rudjer Bokovi Institute, Zagreb, Croatia;(5) Theoretische Physik, Universität München, Theresienstr. 37, 80333 München, Germany

Abstract:	In this paper we obtain a bound $\Lambda_{\mathrm {NC}}\stackrel{ < }{\sim} 150$ TeV on the scale of space-time non-commutativity considering photon-neutrino interactions. We compute -dipole moments and -charge radii originating from space-time non-commutativity 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 -charge radius is found to be $r^ = \sqrt{\|\langle r^2_{\nu}\rangle_{\mathrm {NC}}\|}=\left\|3\sum_{i=1}^3 ({\theta}^{0i})^2\right\|^{1/4} \stackrel{<}{\sim} 1.6 \times 10^{-19}\, {\mathrm {cm}}$ at $\Lambda_{\mathrm {NC}} = 150$ TeV.Received: 17 June 2004, Published online: 18 August 2004

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