Leptoquark Pair Production in Hadronic Interactions

Abstract

The scalar and vector leptoquark pair production cross sections in hadronic collisions are calculated. In a model independent analysis we consider the most general C and P conserving couplings of gluons to both scalar and vector leptoquarks described by an effective low--energy Lagangian which obeys SU(3)_c invariance. Analytrical expressions are derived for the differential and integral scattering cross sections including the case of anomalous vector leptoquark couplings, $\hat{I}{º}_G$ and $\hat{I}{»}_G$, to the gluon field. Numerical predictions are given for the kinematic range of the TEVATRON and LHC. The pair production cross sections are also calculated for the resolved photon contributions to $ep\to e\overline{\hat{I}}¦\hat{I}¦X$ at HERA and LEP $\otimes$ LHC, and for the process ${\hat{I}}^3{\hat{I}}^3\to \hat{I}¦\overline{\hat{I}}¦X$ at possible future $e^{+}{e}^{-}$ linear colliders and ${\hat{I}}^3{\hat{I}}^3$ colliders. Estimates of the search potential for scalar and vector leptoquarks at present and future high energy colliders are given.

44 pages Latex, including 2 ps-figures and 19 eps-figures