2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 17, 107-111
DOI 10.1007/s100520000453

Can four-fermion contact interactions
at one-loop explain the new atomic parity violation results?

A. Gusso

Instituto de Física Teórica, Universidade Estadual Paulista, Rua Pamplona 145, CEP 01405-900 São Paulo, Brazil
(e-mail: gusso@ift.unesp.br)

Received: 28 March 2000 / Revised version: 12 May 2000 /
Published online: 9 August 2000 - © Springer-Verlag 2000

We investigate the possibility that four-fermion contact interactions give rise to the observed deviation from the standard model prediction for the weak charge of cesium, through one-loop contributions. We show that the presence of loops involving the third generation quarks can explain such a deviation.

Copyright Società Italiana di Fisica, Springer-Verlag 2000