Search for Charged Higgs Bosons in Decays of Top Quark Pairs

B Abbott,R Engelmann,H Jöstlein,J M Hauptman,M Roco,A Baden,O V Eroshin,D Karmanov,P Hanlet,A Zylberstejn,B May,A V Kozelov,R Piegaia,J M Kohli,S Mani,V Manankov,A Leflat,A Jonckheere,D A Stoyanova,K M Mauritz,F Borcherding,M R Krishnaswamy,M Strovink,C Boswell,M Merkin,A P Heinson,J Kotcher,L Magaña-Mendoza,N Parua,G E Forden,H L Melanson,R Madden,Tong Hu,P D Grannis,T Yasuda,Y Fisyak,P Yepes,R Yamada,S A Jerger,F Nang,E Won,A L Lyon,H Schellman,W G Cobau,R J Madaras,L Oesch,C Yoshikawa,J A Wightman,K C Frame,A V Kostritskiy,S Blessing,A Para,E A Kozlovsky,B Gómez,H Weerts,M Abolins,R Markeloff,D Coppage,R D Schamberger,A P Vorobiev,T Mckibben,L T Goss,V A Bezzubov,T Rockwell,P Tamburello,P Padley,C Miao,J Sculli,P I Goncharov,B Gibbard,J Womersley,H C Shankar,J P Negret,B Gobbi,K Genser,D Edmunds,M Bhattacharjee,A N Galyaev,C Klopfenstein,H Greenlee,N K Mondal,M Sosebee,F Lobkowicz,P M Tuts,Y Kulik,E G Zverev,G Eppley,M Demarteau,M Jones,C Cretsinger,S Banerjee,M Chung,P Rubinov,B Pawlik,Z Casilum,R Partridge,M Diesburg,M Fortner,K Del Signore,N Graf,K W Merritt,S Reucroft,V S Narasimham,H E Montgomery,D Fein,D Cullen-Vidal,A Narayanan,S Willis,T Fahland,E W Anderson,N Sotnikova,K Gounder,L Lueking,J S Hoftun,J H Christenson,D Hedin,T Heuring,R Jesik,H Haggerty,D Chakraborty,J Solomon,J Mckinley,K Streets,P Yamin,V Sirotenko,W E Cooper,S P Denisov,L Babukhadia,J Jaques,D Buchholz,S Youssef,E Flattum,R J Genik,H T Diehl,P Grudberg,H D Wahl,J Bantly,G Di Loreto,Y Ducros,G Briskin,H Da Motta,T Marshall,G Wang,L Coney,N Amos,H E Fisk,J Ellison,B Baldin,P Gartung,K Yip,S N Gurzhiev,P Z Quintas,A Bross,R K Shivpuri,A Boehnlein,J Snow,D Shpakov,S Chopra,G Guglielmo,J L González Solís,N I Bojko,S Y Jun,H Piekarz,F Stichelbaut,F Hsieh,B Hoeneisen,J F Bartlett,T G Trippe,J Tarazi,H A Neal,B G Pope,C Shaffer,A S Ito,R E Hall,D Denisov,N Oshima,M Paterno,S Fuess,J Warchol,V Vaniev,R Hernández-Montoya,V Oguri,G Watts,A R Clark,G Landsberg,S Krzywdziński ,R Brock,M Zieliński ,S Hagopian,U Heintz,D Ćutts ,Y Gershtein,D Wood ,N Varelas,J M Butler,John Mcdonald ,L Dudko ,A Volkov ,T Ferbel,S Linn ,J Qian,E Barberis,В Н Евдокимов ,B S Acharya,P Mooney,P C Bhat,O I Dahl,G R Snow,Y Pischalnikov,E Shabalina,A Sznajder,M Tartaglia,H Miettinen,D Norman,A Kotwal ,D P Stoker ,M L Stevenson,K De,A Belyaev,M Narain,V Hagopian,V D Elvira,D Casey,C Murphy,S Rajagopalan,A Dyshkant,T Adams ,J Krane,M R Adams ,Shihyun Ahn ,R P Smith,G Kalbfleisch,V Abramov,H Castilla‐Valdez ,T L Geld,D R Claes ,M A Shupe ,P Némethy ,A A Mayorov,K A Johns ,R Kehoe,B C Choudhary,S Kahn,K S Hahn,J M Guida,J Li,V Babintsev ,И Адам ,A Ziemiński ,H Prosper ,T J Mcmahon ,S Fehér ,A Sánchez-Hernández,M A.c Cummings ,F Landry,J V.d Wirjawan ,W Ko,V Stolin,S V Chekulaev,M M Baarmand,B Lauer,M Rijssenbeek,P Ermolov,H A Gordon ,M Fatyga ,R Raja,Z H Zhu,R Ruchti,N Mokhov,M Johnson,R Snihur,P Baringer,B Klima,D Koltick,H S Mao,S Choi,T Joffe–Minor ,T L Thomas ,R L Mccarthy ,E W Varnes,S Hansen,A G Goussiou ,S Eno,C S Mishra,J P Rutherfoord ,S Grinstein,A White,C Hébert ,Y Yu,S Kunori,N J Hadley,J A Guida,В С Буртовой ,Y M Park,J Thompson,P Draper,C E Gerber,M Martin ,G Blazey,A Gupta,G Gutiérrez ,S Snyder,D Owen,A Santoro,O Ramírez ,R Breedon,S B Beri,A Lucotte,A Brandt,B Zhang,D R Green,J B Singh,P C Bloom ,G A Alves,M Mostafa,R W Stephens,P Gutiérrez ,J Hobbs ,V Bhatnagar,M Souza,E J Gallas ,D Lincoln,G Gómez,V Gavrilov,L Sawyer,R Lipton,A K.a Maciel ,C K Jung,N Parashar,W Carvalho,H Singh,I A Bertram ,J Perkins,J T White,S Grünendahl,D Ziemińska ,S Protopopescu,J Linnemann,E Smith,J Cochran,Z Wu,A I Mincer ,Michael Peters ,Z Zhou,J G.r Lima ,M Strauss,Q Z Li,D J Karmgard ,S K Kim,G Steinbrück,J Yu,S Kuleshov,W Chen,M Wayne,N N Biswas ,S Wimpenny ,S Dugad ,R Hirosky,K Davis

doi:10.1103/physrevlett.82.4975

Abstract

We present a search for charged Higgs bosons in decays of pair-produced top quarks using 109.2 +- 5.8 pb^-1 of data recorded from ppbar collisions at sqrt{s} = 1.8 TeV by the D0 detector during 1992-96 at the Fermilab Tevatron. No evidence is found for charged Higgs production, and most parts of the [m(H+),tan(beta)] parameter space where the decay t -> bH+ has a branching fraction close to or larger than that for t -> bW+ are excluded at 95% confidence level. Assuming m(t) = 175 GeV and sigma(ppbar -> ttbar) = 5.5 pb, for m(H+) = 60 GeV, we exclude tan(beta) < 0.97 and tan(beta) > 40.9.

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