Search for Second Generation Leptoquark Pairs Decaying to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">μ</mml:mi><mml:mi mathvariant="italic">ν</mml:mi><mml:mi/><mml:mo>+</mml:mo><mml:mi/><mml:mi mathvariant="normal">jets</mml:mi></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">p</mml:mi><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi mathvariant="italic">p</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>√</mml:mi><mml:mi mathvariant="italic">s</mml:mi><mml:mspace/><mml:mo>=</mml:mo><mml:mspace/><mml:mn>1.8</mml:mn><mml:mn/><mml:mi/><mml:mi mathvariant="normal">TeV</mml:mi></mml:math>
Braden Keim AbbottNew York University, New York, New York 10003M. AbolinsMichigan State University, East Lansing, Michigan 48824V. AbramovInstitute for High Energy Physics, Protvino, RussiaB. S. AcharyaTata Institute of Fundamental Research, Mumbai, IndiaИ. АдамColumbia University, New York, New York 10027D. L. AdamsRice University, Houston, Texas 77005M. AdamsUniversity of Illinois at Chicago, Chicago, Illinois 60607S. AhnFermi National Accelerator Laboratory, Batavia, Illinois 60510V. AkimovInstitute for Theoretical and Experimental Physics, Moscow, RussiaG. A. AlvesLAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, BrazilN. AmosUniversity of Michigan, Ann Arbor, Michigan 48109E. W. AndersonIowa State University, Ames, Iowa 50011M. M. BaarmandStony Brook UniversityV. BabintsevInstitute for High Energy Physics, Protvino, RussiaL. BabukhadiaUniversity of Arizona, Tucson, Arizona 85721A. BadenUniversity of Maryland, College Park, Maryland 20742B. BaldinFermi National Accelerator Laboratory, Batavia, Illinois 60510S. BanerjeeTata Institute of Fundamental Research, Mumbai, IndiaJ. BantlyBrown University, Providence, Rhode Island 02912E. BarberisLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720P. BaringerUniversity of Kansas, Lawrence, Kansas 66045J. F. BartlettFermi National Accelerator Laboratory, Batavia, Illinois 60510A. BelyaevMoscow State University, Moscow, RussiaS. B. BeriPanjab University, Chandigarh, IndiaI. A. BertramLancaster University, Lancaster, United KingdomV. A. BezzubovInstitute for High Energy Physics, Protvino, RussiaP. C. BhatFermi National Accelerator Laboratory, Batavia, Illinois 60510V. BhatnagarPanjab University, Chandigarh, IndiaM. BhattacharjeeState University of New York, Stony Brook, New York 11794N. N. BiswasUniversity of Notre Dame, Notre Dame, Indiana 46556G. BlazeyNorthern Illinois University, DeKalb, Illinois 60115S. 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, Protvino, RussiaF. BorcherdingFermi National Accelerator Laboratory, Batavia, Illinois 60510C. BoswellUniversity of California, Riverside, California 92521A. BrandtFermi National Accelerator Laboratory, Batavia, Illinois 60510R. BreedonUniversity of California, Davis, California 95616G. BriskinBrown University, Providence, Rhode Island 02912R. BrockMichigan State University, East Lansing, Michigan 48824A. BrossFermi National Accelerator Laboratory, Batavia, Illinois 60510D. BuchholzNorthwestern University, Evanston, Illinois 60208В. С. БуртовойInstitute for High Energy Physics, Protvino, RussiaJ. M. ButlerW. CarvalhoLAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, BrazilD. CaseyMichigan State University, East Lansing, Michigan 48824Z. CasilumState University of New York, Stony Brook, New York 11794H. Castilla-ValdezCINVESTAV, Mexico City, MexicoD. ChakrabortyState University of New York, Stony Brook, New York 11794S. V. ChekulaevInstitute for High Energy Physics, Protvino, RussiaW. ChenState University of New York, Stony Brook, New York 11794S. ChoiSeoul National University, Seoul, KoreaS. ChopraFlorida State University, Tallahassee, Florida 32306B. 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. ClarkLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720W. G. CobauUniversity of Maryland, College Park, Maryland 20742J. CochranUniversity of California, Riverside, California 92521L. ConeyUniversity of Notre Dame, Notre Dame, Indiana 46556W. E. CooperFermi National Accelerator Laboratory, Batavia, Illinois 60510D. CoppageUniversity of Kansas, Lawrence, Kansas 66045C. CretsingerUniversity of Rochester, Rochester, New York 14627D. Cullen-VidalBrown University, Providence, Rhode Island 02912M.A.C. CummingsNorthern Illinois University, DeKalb, Illinois 60115D. Cutts(DØ Collaboration)O. I. DahlUniversidad de Buenos Aires, Buenos Aires, ArgentinaK. DavisUniversity of Arizona, Tucson, Arizona 85721K. DeUniversity of Texas, Arlington, Texas 76019K. Del SignoreUniversity of Michigan, Ann Arbor, Michigan 48109M. DemarteauInstitute of High Energy Physics, Beijing, People's Republic of ChinaD. DenisovInstitut des Sciences Nucléaires, IN2P3-CNRS, Universite de Grenoble 1, Grenoble, FranceS. P. DenisovInstitute for High Energy Physics, Protvino, RussiaH. T. DiehlCINVESTAV, Mexico City, MexicoM. DiesburgDAPNIA/Service de Physique des Particules, CEA, Saclay, FranceG. Di LoretoMichigan State University, East Lansing, Michigan 48824P. DraperCINVESTAV, Mexico City, MexicoY. DucrosInstitute of High Energy Physics, Beijing, People's Republic of ChinaL. DudkoMoscow State University, Moscow, RussiaS. R. DugadTata Institute of Fundamental Research, Mumbai, IndiaA. DyshkantDAPNIA/Service de Physique des Particules, CEA, Saclay, FranceD. Edmunds(DØ Collaboration)J. EllisonUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilV. D. ElviraState University of New York, Stony Brook, New York 11794R. EngelmannInstitute of High Energy Physics, Beijing, People's Republic of ChinaS. C. Eno(DØ Collaboration)G. EppleyRice University, Houston, Texas 77005P. ErmolovUniversidad de los Andes, Bogotá, ColombiaO. V. Eroshin(DØ Collaboration)H. EvansColumbia University, New York, New York 10027В. Н. Евдокимов(DØ Collaboration)T. FahlandUniversity of California, Irvine, California 92697M. FatygaUniversidad de Buenos Aires, Buenos Aires, ArgentinaS. FehérInstitute of High Energy Physics, Beijing, People's Republic of ChinaD. Fein(DØ Collaboration)T. FerbelUniversidad San Francisco de Quito, Quito, EcuadorH. E. FiskUniversidad San Francisco de Quito, Quito, EcuadorY. FisyakBrookhaven National Laboratory, Upton, New York 11973
1999lv
ABI
Аннотация
We report on a search for second generation leptoquarks (LQ) produced in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ using the D0 detector at Fermilab. Second generation leptoquarks are assumed to be produced in pairs and to decay to either \ensuremath{\mu} or \ensuremath{\nu} and either a strange or a charm quark $(q)$. Limits are placed on $\ensuremath{\sigma}(p\overline{p}\ensuremath{\rightarrow}\mathrm{LQ}\overline{\mathrm{LQ}}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}+\mathrm{jets})$ as a function of the mass of the leptoquark. For equal branching ratios to $\ensuremath{\mu}q$ and $\ensuremath{\nu}q$, second generation scalar leptoquarks with a mass below $160\mathrm{GeV}{/c}^{2}$, vector leptoquarks with anomalous minimal vector couplings with a mass below $240\mathrm{GeV}{/c}^{2}$, and vector leptoquarks with Yang-Mills couplings with a mass below $290\mathrm{GeV}{/c}^{2}$, are excluded at the $95%$ confidence level.
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