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The European Physical Journal C
ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)
Abstract Volume 4 Issue 4 (1998) pp 661-667
DOI 10.1007/s100529800811
theoretical physics:
$CP$-odd anomalous $W$-boson couplings from supersymmetry
Minako Kitahara (1) (a), Miho Marui (2), Noriyuki Oshimo (3), Tomomi Saito (1), Akio Sugamoto (1)
(1) Department of Physics and Graduate School of Humanities and Sciences, Ochanomizu University, Otsuka 2-1-1, Bunkyo-ku, Tokyo 112, Japan
(2) Faculty of Social Information Science, Kure University, Gouhara 2411-26, Kure, Hiroshima 724-07, Japan
(3) Institute for Cosmic Ray Research, University of Tokyo, Midori-cho 3-2-1, Tanashi, Tokyo 188, Japan
Received: 6 October 1997 / Published online: 26 February 1998
Abstract. The supersymmetric standard model contains a new $CP$-violating phase in the mass matrices for charginos and neutralinos, which could induce $CP$-odd anomalous couplings for the $WWZ$ and $WW\gamma$ vertices at the one-loop level. We study these couplings, paying attention to the model-parameter and $q^2$ dependencies. It is shown that the $CP$-odd form factors could have values of order $10^{-3}-10^{-4}$, which are much larger than those predicted by the standard model. We also discuss the possibility of examining these form factors in experiments.
(a) Present address: Sendai Research Laboratory, Kokusai Electric Co. LTD., Sendai 981-32, Japan
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Online publication: July 20, 1998
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