Search for Scalar Leptoquark Pairs Decaying to Electrons and Jets in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi mathvariant="italic">p</mml:mi></mml:math>Collisions
Braden Keim AbbottNew York University, New York, New York 10003M. AbolinsMichigan State University, East Lansing, Michigan 48824B. S. AcharyaTata Institute of Fundamental Research, Colaba, Mumbai 400005, IndiaИ. АдамUniversidad de Los Andes, Bogotá, ColombiaD. L. AdamsRice University, Houston, Texas 77005M. AdamsUniversity of Illinois at Chicago, Chicago, Illinois 60607S. AhnFermi National Accelerator Laboratory, Batavia, Illinois 60510H. AiharaLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720G. A. AlvesLAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, BrazilE. AmidiNortheastern University, Boston, Massachusetts 02115N. AmosUniversity of Michigan, Ann Arbor, Michigan 48109E. W. AndersonIowa State University, Ames, Iowa 50011R. AsturUniversity of Arizona, Tucson, United StatesM. M. BaarmandBoston University, Boston, United StatesA. BadenUniversity of Maryland, College Park, Maryland 20742V. BalamuraliUniversity of Notre Dame, Notre Dame, Indiana 46556J. BalderstonUniversity of Hawaii, Honolulu, Hawaii 96822B. BaldinFermi National Accelerator Laboratory, Batavia, Illinois 60510S. BanerjeeTata Institute of Fundamental Research, Colaba, Mumbai 400005, IndiaJ. BantlyBrown University, Providence, Rhode Island 02912J. F. BartlettFermi National Accelerator Laboratory, Batavia, Illinois 60510K. BaziziUniversity of Rochester, Rochester, New York 14627A. BelyaevBrookhaven National Laboratory, Upton, United StatesS. B. BeriUniversity of Panjab, Chandigarh 16-00-14, IndiaI. A. BertramNorthwestern University, Evanston, Illinois 60208V. A. BezzubovInstitute for High Energy Physics, 142-284 Protvino, RussiaP. C. BhatFermi National Accelerator Laboratory, Batavia, Illinois 60510V. BhatnagarUniversity of Panjab, Chandigarh 16-00-14, IndiaM. BhattacharjeeUniversity of Delhi, New Delhi, IndiaN. N. BiswasUniversity of Notre Dame, Notre Dame, Indiana 46556G. BlazeyUniversity of Buenos Aires, Buenos Aires, ArgentinaS. BlessingFlorida State University, Tallahassee, Florida 32306P. C. BloomUniversity of California, Davis, California 95616A. BoehnleinFermi National Accelerator Laboratory, Batavia, Illinois 60510N. I. BojkoInstitute for High Energy Physics, 142-284 Protvino, RussiaF. BorcherdingFermi National Accelerator Laboratory, Batavia, Illinois 60510C. BoswellUniversity of California, Riverside, California 92521A. BrandtUniversity of California, Davis, Davis, United StatesR. BrockMichigan State University, East Lansing, Michigan 48824A. BrossUniversity of California, Irvine, Irvine, United StatesD. BuchholzNorthwestern University, Evanston, Illinois 60208В. С. БуртовойInstitute for High Energy Physics, 142-284 Protvino, RussiaJ. M. ButlerBoston University, Boston, United StatesW. CarvalhoLAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, BrazilD. CaseyUniversity of Rochester, Rochester, New York 14627Z. CasilumState University of New York, Stony Brook, New York 11794H. Castilla-ValdezCINVESTAV, Mexico City, MexicoD. ChakrabortyUniversity of California, Riverside, Riverside, United StatesS.-M. ChangNortheastern University, Boston, Massachusetts 02115S. V. ChekulaevInstitute for High Energy Physics, 142-284 Protvino, RussiaL.-P. ChenLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720W. ChenState University of New York, Stony Brook, New York 11794S. ChoiSeoul National University, Seoul, KoreaS. ChopraUniversity of Michigan, Ann Arbor, Michigan 48109B. C. ChoudharyUniversity of California, Riverside, California 92521J. H. ChristensonFermi National Accelerator Laboratory, Batavia, Illinois 60510M. ChungUniversity of Illinois at Chicago, Chicago, Illinois 60607D. R. ClaesUniversity of Nebraska, Lincoln, Nebraska 68588A. R. ClarkCenter for Research and Advanced Studies of the National Polytechnic Institute, Mexico City, MexicoW. G. CobauUniversity of Maryland, College Park, Maryland 20742J. CochranColumbia University, New York, United StatesW. E. CooperUniversity of Delhi, New Delhi, IndiaC. CretsingerUniversity of Rochester, Rochester, New York 14627D. Cullen-VidalBrown University, Providence, Rhode Island 02912M.A.C. CummingsUniversity of Hawaii, Honolulu, Hawaii 96822D. CuttsBrown University, Providence, Rhode Island 02912O. I. DahlLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720K. DavisUniversidad de Buenos Aires, Buenos Aires, ArgentinaK. DeUniversity of Texas, Arlington, Texas 76019K. Del SignoreUniversity of Michigan, Ann Arbor, Michigan 48109M. DemarteauFermi National Accelerator Laboratory, Batavia, Illinois 60510D. DenisovCINVESTAV, Mexico City, MexicoS. P. DenisovInstitute for High Energy Physics, 142-284 Protvino, RussiaH. T. DiehlBrookhaven National Laboratory, Upton, New York 11973M. DiesburgUniversidad de los Andes, Bogotá, ColombiaG. Di LoretoMichigan State University, East Lansing, Michigan 48824P. DraperUniversidad de los Andes, Bogotá, ColombiaY. DucrosCEA, DAPNIA/Service de Physique des Particules, CE-SACLAY, Gif-sur-Yvette, FranceL. DudkoMoscow State University, Moscow, RussiaS. R. DugadTata Institute of Fundamental Research, Colaba, Mumbai 400005, IndiaD. EdmundsBrookhaven National Laboratory, Upton, New York 11973J. EllisonUniversity of California, Riverside, California 92521V. D. ElviraState University of New York, Stony Brook, New York 11794R. EngelmannBrookhaven National Laboratory, Upton, New York 11973S. C. EnoUniversity of Maryland, College Park, Maryland 20742G. EppleyRice University, Houston, Texas 77005P. ErmolovUniversidad de Buenos Aires, Buenos Aires, ArgentinaO. V. EroshinUniversidad de Buenos Aires, Buenos Aires, ArgentinaВ. Н. ЕвдокимовUniversidad de Buenos Aires, Buenos Aires, ArgentinaT. FahlandUniversity of California, Irvine, California 92697M. FatygaUniversity of Rochester, Rochester, New York 14627M. FatygaUniversity of Rochester, Rochester, New York 14627J. FeatherlyUniversidad de los Andes, Bogotá, ColombiaS. FehérBrookhaven National Laboratory, Upton, New York 11973D. FeinBrookhaven National Laboratory, Upton, New York 11973T. FerbelCINVESTAV, Mexico City, MexicoG. FinocchiaroUniversidad de los Andes, Bogotá, ColombiaH. E. FiskUniversidad de Buenos Aires, Buenos Aires, ArgentinaY. FisyakCINVESTAV, Mexico City, MexicoE. FlattumUniversity of Arizona, Tucson, Arizona 85721
1997lv
ABI
Аннотация
We have searched for the pair production of first generation scalar leptoquarks in the $\mathrm{eejj}$ channel using the full data set $(123{\mathrm{pb}}^{\ensuremath{-}1})$ collected with the D0 detector at the Fermilab Tevatron during 1992--1996. We observe no candidates with an expected background of approximately 0.4 events. Comparing the experimental 95% confidence level upper limit to theoretical calculations of the cross section with the assumption of a 100% branching fraction of $\mathrm{eq}$, we set a lower limit on the mass of a first generation scalar leptoquark of $225\mathrm{GeV}{/c}^{2}$. The results of this analysis rule out the interpretation of the excess of high ${Q}^{2}$ events at DESY HERA as leptoquarks which decay exclusively to $\mathrm{eq}$.
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