S and T for Leptoquarks and Bileptons

Details S and T for Leptoquarks and Bileptons S and T for Leptoquarks and Bileptons

1997-11-11

arxiv.org/abs/hep-ph/9711282v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages RevTex. 2 figures (gz.tar) included at end. In replacement, only report no. changed

Scientific paper

We calculate contributions to the oblique parameters $S$ and $T$ for leptoquarks and bileptons, and find phenomenological constraints on their allowed masses. Leptoquarks suggested by the neutral and charged current anomalies at HERA can give improved agreement with both $S$ and $T$. If bileptons are the only new states, the singly-charged one must be heavier than the directly-established lower limit. We also consider SU(15) grand unification to find when it can be consistent with precision electroweak measurements.

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