H1prelim-07-164

A search for Leptoquarks in ep collisions at HERA

Reference Preliminary results for LP2007, Summer 2007
Figures  (1a)  (1b)  (1c)  (1d)  (2a)  (2b)  (2c)  (2d)  (3a)  (2b)  (3c)  (3d)  (4a)  (4b)  (5a)  (5b)  (5c)  (5d)  (6a)  (6b) (6b)
Contact Ilias Panagoulias, Cristi Diaconu
Abstract A search for scalar and vector leptoquarks coupling to first generation fermions is performed by the H1 experiment using the full HERA~II $e^{\pm}p$ data, collected in the years 2003-2007. No significant evidence for the direct production of such particles is found in a data sample with a large transverse momentum final state electron or with large missing transverse momentum. The results of the present analysis are combined with those of the searches in the $e^{+}p$ and $e^{-}p$ data of the HERA I phase in order to obtain the respective mass spectra using the complete HERA~I+II data.
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