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arxiv: hep-ex/0506074 · v1 · submitted 2005-06-29 · ✦ hep-ex

Recognition: unknown

Search for First-Generation Scalar Leptoquarks in bm{p bar{p}} collisions at sqrt{s}=1.96 TeV

The CDF Collaboration: D.Acosta , J.Adelman , T.Affolder , T.Akimoto , M.G.Albrow , D.Ambrose , S.Amerio , D.Amidei
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A.Anastassov K.Anikeev A.Annovi J.Antos M.Aoki G.Apollinari T.Arisawa J-F.Arguin A.Artikov W.Ashmanskas A.Attal F.Azfar P.Azzi-Bacchetta N.Bacchetta H.Bachacou W.Badgett A.Barbaro-Galtieri G.J.Barker V.E.Barnes B.A.Barnett S.Baroiant G.Bauer F.Bedeschi S.Behari S.Belforte G.Bellettini J.Bellinger A.Belloni E.Ben-Haim D.Benjamin A.Beretvas T.Berry A.Bhatti M.Binkley D.Bisello M.Bishai R.E.Blair C.Blocker K.Bloom B.Blumenfeld A.Bocci A.Bodek G.Bolla A.Bolshov D.Bortoletto J.Boudreau S.Bourov B.Brau C.Bromberg E.Brubaker J.Budagov H.S.Budd K.Burkett G.Busetto P.Bussey K.L.Byrum S.Cabrera M.Campanelli M.Campbell F.Canelli A.Canepa M.Casarsa D.Carlsmith R.Carosi S.Carron M.Cavalli-Sforza A.Castro P.Catastini D.Cauz A.Cerri L.Cerrito J.Chapman Y.C.Chen M.Chertok G.Chiarelli G.Chlachidze F.Chlebana I.Cho K.Cho D.Chokheli J.P.Chou S.Chuang K.Chung W-H.Chung Y.S.Chung M.Cijliak C.I.Ciobanu M.A.Ciocci A.G.Clark D.Clark M.Coca A.Connolly M.Convery J.Conway B.Cooper K.Copic M.Cordelli G.Cortiana J.Cranshaw J.Cuevas A.Cruz R.Culbertson C.Currat D.Cyr D.Dagenhart S.DaRonco S.D'Auria P.deBarbaro S.Dececco A.Deisher G.DeLentdecker M.Dell'Orso S.Demers L.Demortier M.Deninno D.Depedis P.F.Derwent T.Devlin C.Dionisi J.R.Dittmann P.DiTuro C.D\"orr A.Dominguez S.Donati M.DOnega J.Donini M.D'Onofrio T.Dorigo K.Ebina J.Efron J.Ehlers R.Erbacher M.Erdmann D.Errede S.Errede R.Eusebi H-C.Fang S.Farrington I.Fedorko W.T.Fedorko R.G.Feild M.Feindt J.P.Fernandez R.D.Field G.Flanagan L.R.Flores-Castillo A.Foland S.Forrester G.W.Foster M.Franklin J.C.Freeman Y.Fujii I.Furic A.Gajjar M.Gallinaro J.Galyardt M.Garcia-Sciveres A.F.Garfinkel C.Gay H.Gerberich D.W.Gerdes E.Gerchtein S.Giagu P.Giannetti A.Gibson K.Gibson C.Ginsburg K.Giolo M.Giordani M.Giunta G.Giurgiu V.Glagolev D.Glenzinski M.Gold N.Goldschmidt D.Goldstein J.Goldstein G.Gomez G.Gomez-Ceballos M.Goncharov O.Gonz\'alez I.Gorelov A.T.Goshaw Y.Gotra K.Goulianos A.Gresele M.Griffiths C.Grosso-Pilcher U.Grundler J.GuimaraesdaCosta C.Haber K.Hahn S.R.Hahn E.Halkiadakis A.Hamilton B-Y.Han R.Handler F.Happacher K.Hara M.Hare R.F.Harr R.M.Harris F.Hartmann K.Hatakeyama J.Hauser C.Hays H.Hayward B.Heinemann J.Heinrich M.Hennecke M.Herndon C.Hill D.Hirschbuehl A.Hocker K.D.Hoffman A.Holloway S.Hou M.A.Houlden B.T.Huffman Y.Huang R.E.Hughes J.Huston K.Ikado J.Incandela G.Introzzi M.Iori Y.Ishizawa C.Issever A.Ivanov Y.Iwata B.Iyutin E.James D.Jang B.Jayatilaka D.Jeans H.Jensen E.J.Jeon M.Jones K.K.Joo S.Y.Jun T.Junk T.Kamon J.Kang M.KaragozUnel P.E.Karchin Y.Kato Y.Kemp R.Kephart U.Kerzel V.Khotilovich B.Kilminster D.H.Kim H.S.Kim J.E.Kim M.J.Kim M.S.Kim S.B.Kim S.H.Kim Y.K.Kim M.Kirby L.Kirsch S.Klimenko M.Klute B.Knuteson B.R.Ko H.Kobayashi D.J.Kong K.Kondo J.Konigsberg K.Kordas A.Korn A.Korytov A.V.Kotwal A.Kovalev J.Kraus I.Kravchenko A.Kreymer J.Kroll M.Kruse V.Krutelyov S.E.Kuhlmann S.Kwang A.T.Laasanen S.Lai S.Lami S.Lammel M.Lancaster R.Lander K.Lannon A.Lath G.Latino I.Lazzizzera C.Lecci T.LeCompte J.Lee S.W.Lee R.Lef\`evre N.Leonardo S.Leone S.Levy J.D.Lewis K.Li C.Lin C.S.Lin M.Lindgren E.Lipeles T.M.Liss A.Lister D.O.Litvintsev T.Liu Y.Liu N.S.Lockyer A.Loginov M.Loreti P.Loverre R-S.Lu D.Lucchesi P.Lujan P.Lukens G.Lungu L.Lyons J.Lys R.Lysak E.Lytken D.MacQueen R.Madrak K.Maeshima P.Maksimovic G.Manca F. Margaroli R.Marginean C.Marino A.Martin M.Martin V.Martin M.Mart\'inez T.Maruyama H.Matsunaga M.Mattson P.Mazzanti K.S.McFarland D.McGivern P.M.McIntyre P.McNamara R. McNulty A.Mehta S.Menzemer A.Menzione P.Merkel C.Mesropian A.Messina T.Miao N.Miladinovic J.Miles L.Miller R.Miller J.S.Miller C.Mills R.Miquel S.Miscetti G.Mitselmakher A.Miyamoto N.Moggi B.Mohr R.Moore M.Morello P.A.MovillaFernandez J.Muelmenstaedt A.Mukherjee M.Mulhearn T.Muller R.Mumford A.Munar P.Murat J.Nachtman S.Nahn I.Nakano A.Napier R.Napora D.Naumov V.Necula J.Nielsen T.Nelson C.Neu M.S.Neubauer T.Nigmanov L.Nodulman O.Norniella T.Ogawa S.H.Oh Y.D.Oh T.Ohsugi T.Okusawa R.Oldeman R.Orava W.Orejudos K.Osterberg C.Pagliarone E.Palencia R.Paoletti V.Papadimitriou A.A.Paramonov S.Pashapour J.Patrick G.Pauletta M.Paulini C.Paus D.Pellett A.Penzo T.J.Phillips G.Piacentino J.Piedra K.T.Pitts C.Plager L.Pondrom G.Pope X.Portell O.Poukhov N.Pounder F.Prakoshyn A.Pronko J.Proudfoot F.Ptohos G.Punzi J.Rademacker M.A.Rahaman A.Rakitine S.Rappoccio F.Ratnikov H.Ray B.Reisert V.Rekovic P.Renton M.Rescigno F.Rimondi K.Rinnert L.Ristori W.J.Robertson A.Robson T.Rodrigo S.Rolli R.Roser R.Rossin C.Rott J.Russ V.Rusu A.Ruiz D.Ryan H.Saarikko S.Sabik A.Safonov R.St.Denis W.K.Sakumoto G.Salamanna D.Saltzberg C.Sanchez L.Santi S.Sarkar K.Sato P.Savard A.Savoy-Navarro P.Schlabach E.E.Schmidt M.P.Schmidt M.Schmitt T.Schwarz L.Scodellaro A.L.Scott A.Scribano F.Scuri A.Sedov S.Seidel Y.Seiya A.Semenov F.Semeria L.Sexton-Kennedy I.Sfiligoi M.D.Shapiro T.Shears P.F.Shepard D.Sherman M.Shimojima M.Shochet Y.Shon I.Shreyber A.Sidoti A.Sill P.Sinervo A.Sisakyan J.Sjolin A.Skiba A.J.Slaughter K.Sliwa D.Smirnov J.R.Smith F.D.Snider R.Snihur M.Soderberg A.Soha S.V.Somalwar J.Spalding M.Spezziga F.Spinella P.Squillacioti H.Stadie M.Stanitzki B.Stelzer O.Stelzer-Chilton D.Stentz J.Strologas D.Stuart J.S.Suh A.Sukhanov K.Sumorok H.Sun T.Suzuki A.Taffard R.Tafirout H.Takano R.Takashima Y.Takeuchi K.Takikawa M.Tanaka R.Tanaka N.Tanimoto M.Tecchio P.K.Teng K.Terashi R.J.Tesarek S.Tether J.Thom A.S.Thompson E.Thomson P.Tipton V.Tiwari S.Tkaczyk D.Toback K.Tollefson T.Tomura D.Tonelli M.T\"onnesmann S.Torre D.Torretta S.Tourneur W.Trischuk R.Tsuchiya S.Tsuno D.Tsybychev N.Turini F.Ukegawa T.Unverhau S.Uozumi D.Usynin L.Vacavant A.Vaiciulis A.Varganov S.VejcikIII G.Velev V.Veszpremi G.Veramendi T.Vickey R.Vidal I.Vila R.Vilar I.Vollrath I.Volobouev M.vonderMey P.Wagner R.G.Wagner R.L.Wagner W.Wagner R.Wallny T.Walter Z.Wan M.J.Wang S.M.Wang A.Warburton B.Ward S.Waschke D.Waters T.Watts M.Weber W.C.WesterIII B.Whitehouse D.Whiteson A.B.Wicklund E.Wicklund H.H.Williams P.Wilson B.L.Winer P.Wittich S.Wolbers C.Wolfe M.Wolter M.Worcester S.Worm T.Wright X.Wu F.W\"urthwein A.Wyatt A.Yagil T.Yamashita K.Yamamoto J.Yamaoka C.Yang U.K.Yang W.Yao G.P.Yeh J.Yoh K.Yorita T.Yoshida I.Yu S.Yu J.C.Yun L.Zanello A.Zanetti I.Zaw F.Zetti J.Zhou S.Zucchelli
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classification ✦ hep-ex
keywords betalimitsproductionsearcharisingcollisionsfirst-generationfunction
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We report on a search for pair production of first-generation scalar leptoquarks ($LQ$) in $p \bar{p}$ collisions at $\sqrt{s}$=1.96 TeV using an integrated luminosity of 203 $pb^{-1}$ collected at the Fermilab Tevatron collider by the CDF experiment. We observe no evidence for $LQ$ production in the topologies arising from $LQ \bar{LQ} \to eqeq$ and $LQ \bar{LQ} \to eq \nu q$, and derive 95% C.L. upper limits on the $LQ$ production cross section. %as a function of $\beta$, where $\beta$ is the branching fraction for $LQ \to eq$. The results are combined with those obtained from a separately reported CDF search in the topology arising from $LQ\bar{LQ} \to \nu q \nu q$ and 95% C.L. lower limits on the LQ mass as a function of $\beta = BR(LQ \to eq) $ are derived. The limits are 236, 205 and 145 GeV/c$^2$ for $\beta$ = 1, $\beta$ = 0.5 and $\beta$ = 0.1, respectively.

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