Author/Authors :
Q2) Original Research Article
Pages 471-502
H1 Collaboration، نويسنده , , J. C. Adloff، نويسنده , , A. V. Andreev، نويسنده , , B. Andrieu، نويسنده , , T. Anthonis، نويسنده , , V. Arkadov، نويسنده , , A. Astvatsatourov، نويسنده , , A. Babaev and NRMI Investigators، نويسنده , , Matthias J. Bahr، نويسنده , , P. Baranov، نويسنده , , E. Barrelet، نويسنده , , W. Bartel، نويسنده , , P. Bate، نويسنده , , J. Becker، نويسنده , , A. Beglarian، نويسنده , , O. Behnke، نويسنده , , C. Beier، نويسنده , , V. A. Belousov، نويسنده , , T. Benisch، نويسنده , , Ch. Berger، نويسنده , , et al.، نويسنده ,
Abstract :
A search for scalar and vector leptoquarks coupling to first generation fermions is performed in the H1 experiment at the ep collider HERA. The analysis uses e−p data collected in 1998 and 1999 at a centre-of-mass energy of 320 GeV, corresponding to an integrated luminosity of ∼15 pb−1. No 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, and constraints on leptoquark models are established. For a Yukawa coupling of electromagnetic strength leptoquarks are excluded for masses up to ∼290 GeV. This analysis complements the leptoquark searches performed previously using data collected whilst HERA was operating with positrons instead of electrons.
