Digitale Medien
Springer
The European physical journal
7 (1999), S. 141-148
ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract. The Standard Model is extended by a $SU(2)_L$ singlet of vector leptoquarks. An additional SU(4) gauge symmetry between right-handed up quarks and right-handed leptons is introduced to render the model renormalizable. The arrangement is made in such a way that no conflict with low energy restrictions is encountered. The $SU(2)_L$ singlet mediates interactions between the right-handed leptons and up type quarks for which only moderate low energy restrictions $M_{LQ}/g_{LQ} 〉 $ few hundred GeV exist. However, it is not a candidate to explain the anomalous HERA data at large $Q^2$ because theoretical reasons imply that $g_{LQ} \geq g_s$ which would give a much stronger anomalous HERA effect. We furthermore argue that the inequality $g_{LQ} \geq g_s$ is a general feature of consistent vector leptoquark models. Although our model is not relevant for HERA, it is interesting per se as a description of leptoquarks of mass $\leq$ 1 TeV consistent with all low-energy requirements.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s100529900965
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