Search for resonance decays to lepton+jet at DESY HERA and limits on leptoquarks Academic Article uri icon


  • A search for narrow-width resonances that decay into electron+jet or neutrino+jet has been performed with the ZEUS detector at the DESY ep collider HERA operating at center-of-mass energies of 300 and 318 GeV. An integrated e+p luminosity of 114.8 pb-1 and e-p luminosity of 16.7 pb-1 were used. No evidence for any resonance was found. Limits were derived on the Yukawa coupling as a function of the mass of a hypothetical resonance that has arbitrary decay branching ratios into eq or vq. These limits also apply to squarks predicted by R-parity-violating supersymmetry. Limits for the production of leptoquarks described by the Buchmller-Rckl-Wyler model were also derived for masses up to 400 GeV. For = 0.1, leptoquark masses up to 290 GeV are excluded.

published proceedings

  • Physical Review D - Particles, Fields, Gravitation and Cosmology

author list (cited authors)

  • Chekanov, S., Derrick, M., Krakauer, D., Loizides, J. H., Magill, S., Musgrave, B., ... Adler, V.

complete list of authors

  • Chekanov, S||Derrick, M||Krakauer, D||Loizides, JH||Magill, S||Musgrave, B||Repond, J||Yoshida, R||Mattingly, MCK||Antonioli, P||Bari, G||Basile, M||Bellagamba, L||Boscherini, D||Bruni, A||Bruni, G||Cara Romeo, G||Cifarelli, L||Cindolo, F||Contin, A||Corradi, M||de Pasquale, S||Giusti, P||Iacobucci, G||Margotti, A||Nania, R||Palmonari, F||Pesci, A||Sartorelli, G||Zichichi, A||Aghuzumtsyan, G||Bartsch, D||Brock, I||Goers, S||Hartmann, H||Hilger, E||Irrgang, P||Jakob, HP||Kappes, A||Katz, UF||Kind, O||Meyer, U||Paul, E||Rautenberg, J||Renner, R||Schnurbusch, H||Stifutkin, A||Tandler, J||Voss, KC||Wang, M||Weber, A||Bailey, DS||Brook, NH||Cole, JE||Foster, B||Heath, GP||Heath, HF||Robins, S||Rodrigues, E||Scott, J||Tapper, RJ||Wing, M||Capua, M||Mastroberardino, A||Schioppa, M||Susinno, G||Kim, JY||Kim, YK||Lee, JH||Lim, IT||Pac, MY||Caldwell, A||Helbich, M||Liu, X||Mellado, B||Ning, Y||Paganis, S||Ren, Z||Schmidke, WB||Sciulli, F||Chwastowski, J||Eskreys, A||Figiel, J||Olkiewicz, K||Stopa, P||Zawiejski, L||Adamczyk, L||Bołd, T||Grabowska-Bołd, I||Kisielewska, D||Kowal, AM||Kowal, M||Kowalski, T||Przybycień, M||Suszycki, L||Szuba, D||Szuba, J||Kotański, A||Slomiński, W||Adler, V

publication date

  • September 2003