Search for excited quarks in ep collisions at HERA

F D Aaron ,D Wegener,T Kluge,S Ghazaryan,B Delcourt,A Cholewa,M Von Den Driesch,S Habib,K Nowak,Z Staykova,E Gabathuler,K Urban,G Herrera,K Müller,W Bartel,K Alimujiang,C Vallée,S Levonian,M Del Degan,J.C Bizot,H Zohrabyan,A Dubak,A Valkárová,Y Soloviev,L Goerlich,N Gogitidze,U Straumann,A Dossanov,D Traynor,I Tsakov,M Kapichine,A Petrukhin,I Milcewicz-Mika,R Roosen,A Makankine,G Cozzika,M Fleischer,B Tseepeldorj,B Stella,F Moreau,B Naroska,C Pascaud,P Van Mechelen,C Kiesling,S Vinokurova,M Mudrinic,E Malinovski,J Delvax,G Laštovička-Medin,R.N Shaw-West,R Zus,P Kostka,A Glazov,G Leibenguth,S Shushkevich,G Buschhorn,G Grindhammer,A Baghdasaryan,A Asmone,F Cassol-Brunner,J Turnau,M Steder,J Feltesse,A Lebedev,A Nikiforov,R Felst,P Truöl,O Pejchal,V Brisson,V Lendermann,V Efremenko,S Mikocki,V Lubimov,C Niebuhr,Y Vazdik,V Spaskov,D Ozerov,E Hennekemper,M Kraemer,V Dodonov,A Specka,V Jemanov,D Haidt,E Wünsch,S Egli,A De Roeck,A Bunyatyan,F Sefkow,E Barrelet,V Korbel,V Volchinski,J Gayler,A Falkiewicz,A Rostovtsev,V Tchoulakov,T Preda,G Li,K Begzsuren,J Cvach,R Plačakytė,J Žáček,T Greenshaw,P Sopicki,K Daum,L Lytkin,T Ravdandorj,F Tomasz,D Sunar,A Raspiareza,L Bystritskaya,J Ferencei,T Toll,M Jacquet,K Krastev,Y De Boer,N Loktionova,V Chekelian,I Sheviakov,I Glushkov,H Henschel,E Pérez ,C Wissing ,B Pokorny,W Lange,A Campbell ,B Antunović ,R Horisberger,A Morozov,M Rotaru,B Olivier,V Boudry,C Kleinwort,S V Rusakov ,I Pićurić ,A Vargas Trevino,N Raičević ,B List,D P C Sankey ,R Polifka,I Panagoulias,Th D Papadopoulou ,X Janssen,E Elsen,I R Kenyon ,T N Trinh ,J E Olsson ,E Sauvan,C Helebrant,S Backović ,F Zomer,R Kogler,Michal Deák ,M Hildebrandt,J Kretzschmar,Z Rurikova,R López-Fernández ,J Meyer,A Liptaj,Volker Michels ,M Sauter,Zhiqing Philippe Zhang ,H U Martyn ,M Nožička ,A Fomenko,J B Dainton ,V Palichik,A Zhokin,V Radescu,T Sýkora ,I Smiljanić ,S J Maxfield ,T Sloan,H.‐C Schultz‐Coulon ,M P J Landon ,A Eliseev,V Andreev,E A De Wolf ,Krzysztof Kutak ,S Schmitt,Martin Brinkmann ,K Lipka,C Grab,D Pitzl,T H Tran ,M Pandurović ,L Marti ,P R Newman ,S M Piec ,I Božović-Jelisavc̆ić ,G Thompson,J G Contreras ,B R Grell ,G Stoicea,K H Hiller ,B Roland,P Marage,Bogdan Povh ,J Braciník ,J A Coughlan ,D Hoffmann,L Favart,A Mehta,T Zimmermann,K Krüger,K Černý ,P Robmann,T Naumann ,C Schmitz,T Hreus,J Zálešâk ,M Gouzevitch,L N Shtarkov ,M Klein,C Alexa,D Bruncko,M.E Janssen,A W Jung ,П Мурін ,E Rizvi,J V Morris ,D Šálek,A Knutsson,A Kropivnitskaya,H Jung,J E Ruiz Tabasco ,Peter Thompson ,C Diaconu,S Osman,A J Rahmat ,M Herbst,A Schöning,R C W Henderson ,V Černý ,J Katzy,G Eckerlin,L Schoeffel,D Fischer ,G D Patel ,H Meyer,Andreas Bernhard Meyer ,D South,G Brandt,K B Cantun Avila ,M U Mozer ,A Fedotov,P Reimer,G Nowak,Jenny List ,L Jönsson,P Laycock,Peter Faulkner ,A Belousov

doi:10.1016/j.physletb.2009.06.044

Search for excited quarks in ep collisions at HERA

F D Aaron , D Wegener + Show 250 more

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https://doi.org/10.1016/j.physletb.2009.06.044

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#Search For Excited Quarks #Excited Quarks + Show 8 more

Abstract
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Abstract

A search for excited quarks is performed using the full e±p data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb−1. The electroweak decays of excited quarks q∗→qγ, q∗→qZ and q∗→qW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q∗ production cross sections and on the ratio f/Λ of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited quark searches.

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