Abstract
A search for first-generation leptoquarks was performed in electron-proton and positron-proton
collisions recorded with the ZEUS detector at HERA in 2003–2007 using an integrated luminosity of
366 pb 1. Final states with an electron and jets or with missing transverse momentum and jets were
analyzed, searching for resonances or other deviations from the standard model predictions. No evidence
for any leptoquark signal was found. The data were combined with data previously taken at HERA,
resulting in a total integrated luminosity of 498 pb 1. Limits on the Yukawa coupling, , of leptoquarks
were set as a function of the leptoquark mass for different leptoquark types within the Buchmu¨ller-Ru¨ckl-
Wyler model. Leptoquarks with a coupling ¼ 0:3 are excluded for masses up to 699 GeV.
Original language | English |
---|---|
Article number | 012005 |
Pages (from-to) | 012005/1-012005/14 |
Number of pages | 14 |
Journal | Physical Review. D, Particles, Fields, Gravitation and Cosmology |
Volume | 86 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2012 |