Search for Leptoquark Bosons in ep Collisions at HERA

Abstract

A search for scalar and vector leptoquarks coupling to first generation fermions is performed using the e^+p and e^-p scattering data collected by the H1 experiment between 1994 and 2000. The data correspond to a total integrated luminosity of 117 pb^{-1}. No evidence for the direct or indirect production of such particles is found in data samples with a large transverse momentum final state electron or with large missing transverse momentum. Constraints on leptoquark models are established. For leptoquark couplings of electromagnetic strength, leptoquarks with masses up to 275-325 GeV are ruled out. These limits improve and supercede earlier H1 limits based on subsamples of the data used here.

15 pages, 1 table, 5 figures

References in corpus (1)

• Search for first-generation scalar leptoquarks in ppbar collisions at sqrt(s)=1.96 TeV

Cited by in corpus (28)

• Physics of leptoquarks in precision experiments and at particle colliders
• Visible Effects of Invisible Hidden Valley Radiation
• The Constrained Exceptional Supersymmetric Standard Model
• Theory and Phenomenology of Exotic Isosinglet Quarks and Squarks
• Predictions of the Constrained Exceptional Supersymmetric Standard Model
• Collider Physics at HERA
• Minimal Flavour Violation for Leptoquarks
• WIMP Dark Matter at the International Linear Collider
• LHC Signatures of the Constrained Exceptional Supersymmetric Standard Model
• A General Search for New Phenomena at HERA
• Search for First Generation Leptoquarks in ep Collisions at HERA
• Seeking leptoquarks in IceCube
• Probing leptoquark production at IceCube
• Constraining Scalar Leptoquarks from the K and B Sectors
• Possibility of large lifetime differences in neutral B meson systems
• Search for pair production of first-generation leptoquarks in p pbar collisions at sqrt(s)=1.96 TeV
• Search for pair production of first or second generation leptoquarks in proton-proton collisions at sqrt(s)=7 TeV using the ATLAS detector at the LHC
• Search for Pair Production of First-Generation Scalar Leptoquarks in pp Collisions at sqrt(s) = 7 TeV
• Search for first generation leptoquark pair production in the electron + missing energy + jets final state
• Search for Lepton Flavour Violation in ep Collisions at HERA
• Search for First Generation Scalar Leptoquarks in the evjj channel in pp collisions at sqrt(s) = 7 TeV
• Search for Lepton Flavour Violation at HERA
• Leptoquarks decaying to a top quark and a charged lepton at hadron colliders
• Review of Searches for Rare Processes and Physics Beyond the Standard Model at HERA
• Quaero@H1: An Interface to High-pT HERA Event Data
• The sensitivity of cosmic ray air shower experiments for leptoquark detection
• Electroweak and beyond the Standard Model results from HERA
• Searches for New Physics at HERA