Bounds on contact interactions from LEP1 data and high- [formula omitted]2 HERA events

A 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- Q 2. We explore the 1-loop effects of such interaction in Γ(Z 0 → e +e −) measured at LEP and impose strong bounds on the lower limit of...

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Bibliographic Details
Published inPhysics letters. B Vol. 407; no. 3; pp. 255 - 258
Main Authors Gonzalez-Garcia, M.C., Novaes, S.F.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.1997
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Summary:A 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- Q 2. We explore the 1-loop effects of such interaction in Γ(Z 0 → 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.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(97)00738-7