Journal
PHYSICAL REVIEW D
Volume 86, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.86.012005
Keywords
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Funding
- U.S. Department of Energy
- Italian National Institute for Nuclear Physics (INFN)
- German Federal Ministry for Education and Research (BMBF) [05 H09PDF, 05h09GUF]
- Science and Technology Facilities Council, UK
- Malaysian government
- U.S. National Science Foundation
- Polish Ministry of Science and Higher Education [DPN/N188/DESY/2009]
- Polish Ministry of Science and Higher Education
- Deutsche Forschungsgemeinschaft (DFG) [SFB 676]
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Korean Ministry of Education
- Korea Science and Engineering Foundation
- FNRS
- Belgian Federal Science Policy Office
- Spanish Ministry of Education and Science through funds provided by CICYT
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- German Federal Ministry for Education and Research (BMBF)
- R. F. Presidential Grant [4142.2010.2]
- Russian Ministry of Education and Science [02.740.11.0244]
- Netherlands Foundation for Research on Matter (FOM)
- Israel Science Foundation
- Max Planck Institute for Physics, Munich, Germany
- DESY, Hamburg, Germany
- Polish National Science Centre [DEC-2011/01/BST2/03643]
- Warsaw University, Poland
- Russian Foundation for Basic Research [11-02-91345-DFG_a]
- [1 P03B 04529 (2005-2008)]
- Science and Technology Facilities Council [ST/H001026/2, ST/H001026/1] Funding Source: researchfish
- STFC [ST/H001026/1, ST/H001026/2] Funding Source: UKRI
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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, lambda, of leptoquarks were set as a function of the leptoquark mass for different leptoquark types within the Buchmuller-Ruckl-Wyler model. Leptoquarks with a coupling lambda = 0.3 are excluded for masses up to 699 GeV.
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