Gonzalez-Garcia, M. C. [UNESP]Novaes, Sérgio Ferraz [UNESP]2014-05-272014-05-271997-09-04Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 407, n. 3-4, p. 255-258, 1997.0370-2693http://hdl.handle.net/11449/65188A contact four-fermion interaction between light quarks and electrons has been evoked as a possible explanation for the excess of events observed by HERA at high-Q2. We explore the 1-loop effects of such interaction in Γ(Z0 → e+e-) measured at LEP and impose strong bounds on the lower limit of the effective scale. Our results are able to discard some of the contact interactions as possible explanation for the HERA events. © 1997 Elsevier Science B.V.255-258engArtigo10.1016/S0370-2693(97)00738-7WOS:A1997XX54600010Acesso restrito2-s2.0-0041130621