Search for Squarks and Gluinos in Single-Photon Events with Jets and Large Missing Transverse Energy 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:math>TeV
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 77005Mark Raymond 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 F sicas, Rio de Janeiro, BrazilN. AmosUniversity of Michigan, Ann Arbor, Michigan 48109E. W. AndersonIowa State University, Ames, Iowa 50011R. AsturState University of New York, Stony Brook, New York 11794M. M. BaarmandState University of New York, Stony Brook, New York 11794V. BabintsevInstitute for High Energy Physics, Protvino, RussiaL. BabukhadiaUniversity of Arizona, Tucson, Arizona 85721A. BadenUniversity of Maryland, College Park, Maryland 20742V. BalamuraliUniversity of Notre Dame, Notre Dame, Indiana 46556B. 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. BertramNorthwestern University, Evanston, Illinois 60208V. 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 95616R. BrockMichigan State University, East Lansing, Michigan 48824A. BrossFermi National Accelerator Laboratory, Batavia, Illinois 60510D. BuchholzNorthwestern University, Evanston, Illinois 60208В. С. БуртовойCollaborationJ. M. ButlerW. CarvalhoLAFEX, Centro Brasileiro de Pesquisas F sicas, 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. ChakrabortyStony Brook UniversityS.-M. ChangNortheastern University, Boston, Massachusetts 02115S. V. ChekulaevInstitute for High Energy Physics, 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. 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 60510C. CretsingerUniversity of Rochester, Rochester, New York 14627D. Cullen-VidalBrown University, Providence, Rhode Island 02912M.A.C. CummingsNorthern Illinois University, DeKalb, Illinois 60115D. CuttsBrown University, Providence, Rhode Island 02912O. I. DahlLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720K. DavisUniversity of Arizona, Tucson, Arizona 85721K. DeUniversity of Texas, Arlington, Texas 76019K. Del SignoreUniversity of Michigan, Ann Arbor, Michigan 48109M. DemarteauFermi National Accelerator Laboratory, Batavia, Illinois 60510D. DenisovFermi National Accelerator Laboratory, Batavia, Illinois 60510S. P. DenisovInstitute for High Energy Physics, Protvino, RussiaH. T. DiehlFermi National Accelerator Laboratory, Batavia, Illinois 60510M. DiesburgFermi National Accelerator Laboratory, Batavia, Illinois 60510G. Di LoretoMichigan State University, East Lansing, Michigan 48824P. DraperUniversity of Texas, Arlington, Texas 76019Y. DucrosDAPNIA/Service de Physique des Particules, CEA, Saclay, FranceL. DudkoMoscow State University, Moscow, RussiaS. R. DugadTata Institute of Fundamental Research, Mumbai, IndiaA. DyshkantInstitute for High Energy Physics, Protvino, RussiaD. EdmundsMichigan State University, East Lansing, Michigan 48824J. EllisonUniversity of California, Riverside, California 92521V. D. ElviraState University of New York, Stony Brook, New York 11794R. EngelmannState University of New York, Stony Brook, New York 11794S. C. EnoUniversity of Maryland, College Park, Maryland 20742G. EppleyRice University, Houston, Texas 77005P. ErmolovMoscow State University, Moscow, RussiaO. V. EroshinInstitute for High Energy Physics, Protvino, RussiaВ. Н. ЕвдокимовInstitute for High Energy Physics, Protvino, RussiaT. FahlandUniversity of California, Irvine, California 92697M. FatygaUniversity of Rochester, Rochester, New York 14627S. FehérFermi National Accelerator Laboratory, Batavia, Illinois 60510D. FeinCollaborationT. FerbelUniversity of Rochester, Rochester, New York 14627G. FinocchiaroState University of New York, Stony Brook, New York 11794
ABI
Аннотация
We search for new physics using events with one high transverse energy photon, two or more jets, and an apparent imbalance in transverse energy, in $p\overline{p}$ collisions at the Fermilab Tevatron at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\phantom{\rule{0ex}{0ex}}\mathrm{TeV}$. Such events are predicted for production of supersymmetric particles in some models. No excess is observed beyond expected background. For the parameter space of the minimal supersymmetric standard model with branching fraction $B({\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{2}^{0}\ensuremath{\rightarrow}\ensuremath{\gamma}{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{1}^{0})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$ and ${m}_{{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{2}^{0}}{\ensuremath{-}m}_{{\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\chi}}}_{1}^{0}}>20\phantom{\rule{0ex}{0ex}}\mathrm{GeV}$, we obtain a 95% confidence level lower mass limit of 310 GeV for equal mass squarks and gluinos. The results are also interpreted in models with low energy gauge mediated supersymmetry breaking.
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