Search for pentaquarks decaying to Ξπ in deep inelastic scattering at HERA

S Chekanov,M Derrick,S Magill,S Miglioranzi,B Musgrave,J Repond,Rikutaro Yoshida,M C K Mattingly,N Pavel,A G Yagues Molina,P Antonioli,G Bari,M Basile,L Bellagamba, D Boscherini,A Bruni,G Bruni,G Cara Romeo,L Cifarelli,F Cindolo,A Contin,M Corradi,S De Pasquale, P Giusti,G Iacobucci, A Margotti,A Montanari,R Nania,F Palmonari,A Pesci,A Polini,Lorenzo Rinaldi,G Sartorelli, A Zichichi,G Aghuzumtsyan,D Bartsch, I Brock,S Goers,H Hartmann,E Hilger,P Irrgang,H P Jakob,O Kind,Ulrich Meyer,E Paul,J Rautenberg,R Renner,K C Voss,Mingrong Wang,M Wlasenko,D S Bailey,N H Brook,J E Cole,Greg P Heath,T Namsoo, S A Robins,M Capua,A Mastroberardino,M Schioppa,G Susinno,E Tassi,J Y Kim,K J Ma,M Helbich,Y Ning,Z Ren,W B Schmidke,F Sciulli,J Chwastowski,A Eskreys,J Figiel,A Galas,K Olkiewicz,P Stopa,D Szuba,L Zawiejski, L Adamczyk,T Bold, I Grabowskabold, D Kisielewska,A M Kowal,J łukasik,M Przybycien,L Suszycki,J Szuba,A Kotanski,W Slominski,Volker Adler, U Behrens,I Bloch,K Borras,G Drews,J Fourletova, A Geiser,D Gladkov,P Gottlicher,O Gutsche,T Haas, W Hain,C Horn,B Kahle,U Kotz,H Kowalski, G Kramberger,D Lelas,H Lim,B Lohr, R Mankel,I A Melzerpellmann,C N Nguyen,D Notz,A E Nuncioquiroz,Amita Raval,R Santamarta,U Schneekloth, U Stosslein,G Wolf,C Youngman, W Zeuner,S Schlenstedt, G Barbagli, E Gallo,C Genta,P G Pelfer,A Bamberger,A Benen,F Karstens, D Dobur,N N Vlasov, P Bussey, A T Doyle,James Ferrando,John A Hamilton,S Hanlon,D H Saxon,I O Skillicorn,I Gialas, T Carli,T Gosau,U Holm, N Krumnack,E Lohrmann,M Milite,H Salehi, P Schleper,T Schornersadenius, S Stonjek,K Wichmann,K Wick,Ar Ziegler, C Collinstooth, C Foudas,C Fry,Ricardo Goncalo,K R Long,Alexander Tapper,Mayuko Kataoka,Kunihiro Nagano,K Tokushuku, S Yamada, Yoshio Yamazaki,A N Barakbaev,E Boos,N S Pokrovskiy,B O Zhautykov,D Son,J De Favereau,Krzysztof Piotrzkowski,F Barreiro,C Glasman,O Gonzalez, M A Jimenez, L Labarga,J Del Peso,J Terron,M Zambrana,M Barbi,F Corriveau, Chengliang Liu,Sanjay Padhi,M Plamondon,D G Stairs, Ryan M Walsh,Chen Zhou,T Tsurugai,Alexey Antonov,P Danilov, B A Dolgoshein,V Sosnovtsev,A Stifutkin,S Suchkov,R K Dementiev,P Ermolov,L K Gladilin, I Katkov,L A Khein,I A Korzhavina,V A Kuzmin,B B Levchenko,O Yu Lukina, A S Proskuryakov,L M Shcheglova,D S Zotkin, S A Zotkin,I Abt, C Buttner, A Caldwell,X Liu,J Sutiak,N Coppola,G Grigorescu,S Grijpink,A Keramidas, E Koffeman,P Kooijman,E Maddox,A Pellegrino,S Schagen,H Tiecke,M Vazquez,L Wiggers,E De Wolf,N Brummer, B Bylsma, L S Durkin, T Y Ling,P Allfrey,M A Bell,A M Coopersarkar,A Cottrell, R C E Devenish,B Foster,G Grzelak,C Gwenlan,Takashi Kohno, S S Patel,P B Straub, R Walczak, P Bellan,A Bertolin,R Brugnera,R Carlin,R Ciesielski,F Dal Corso,S Dusini,A Garfagnini,S Limentani,A Longhin,L Stanco,M Turcato,E A Heaphy,F Metlica,B Y Oh,J Whitmore,Y Iga,G Dagostini,G Marini,A Nigro, J C Hart, H Abramowicz,A M Gabareen,S Kananov,A Kreisel,A Levy,M Kuze,Shunsuke Kagawa,T Tawara,R Hamatsu,H Kaji,S Kitamura,K Matsuzawa,O Ota,Y D Ri,M Costa,M I Ferrero, Vincenzo Monaco, R Sacchi,Ada Solano,M Arneodo, M Ruspa,S Fourletov,T Koop,J F Martin,A Mirea,J M Butterworth,R Hallwilton,T W Jones,J H Loizides,M R Sutton,C Targettadams,M Wing,J Ciborowski,P Kulinski,P łuzniak,J Malka,R J Nowak,J M Pawlak,J Sztuk,T Tymieniecka,A Tyszkiewicz,A Ukleja,J Ukleja,A F żarnecki,M Adamus,Pawel Plucinski,Y Eisenberg,D Hochman,U Karshon,M S Lightwood,A Everett,D Kcira,S Lammers,L Li,D D Reeder,M Rosin,P Ryan, A Savin,W H Smith,S Dhawan,Sampa Bhadra,C D Catterall, Yongping Cui,G F Hartner,S Menary,U Noor,Mara Senghi Soares,J Standage, J J Whyte

PHYSICS LETTERS B（2005）

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摘要

A search for pentaquarks decaying to Xi(-) pi(-) (Xi(-) pi(+)) and corresponding antiparticles has been performed with the ZEUS detector at HERA. The data sample consists of deep inelastic ep scattering events at centre-of-mass energies of 300 and 318 GeV, and corresponds to 121 pb(-1) of integrated luminosity. A clear signal for Xi(0)(1530) -> Xi(-)pi(+) was observed. However, no signal for any new baryonic state was observed at higher masses in either the Xi(-)pi(-) or Xi(-)pi(+) channels. The searches in the antiparticle channels were also negative. Upper limits on the ratio of a possible Xi(--)(3/2) (Xi(0)(3/2)) signal to the Xi(0)(1530) signal were set in the mass range 1650-2350 MeV. (c) 2005 Elsevier B.V. All rights reserved.

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