Evidence for a narrow anti-charmed baryon state

Summary, in English

A narrow resonance in D*(-)p and D*(+)(p) over bar invariant mass combinations is observed in inelastic electron-proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099 +/- 3(stat.) +/- 5(syst.) MeV and a measured Gaussian width of 12 +/- 3(stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of uudd (c) over bar, together with the charge conjugate. (C) 2004 Elsevier B.V. All rights reserved.

• Author: A Aktas; V Andreev; T Anthonis; A Asmone; A Babaev; S Backovic; J Bahr; P Baranov; E Barrelet; W Bartel; S Baumgartner; J Becker; M Beckingham; O Behnke; O Behrendt; A Belousov; C Berger; N Berger; T Berndt; JC Bizot; J Bohme; MO Boenig; V Boudry; J Bracinik; V Brisson; HB Broker; DP Brown; D Bruncko; FW Busser; A Bunyatyan; G Buschhorn; L Bystritskaya; AJ Campbell; S Caron; F Cassol-Brunner; K Cerny; V Chekelian; C Collard; JG Contreras; YR Coppens; JA Coughlan; BE Cox; G Cozzika; J Cvach; JB Dainton; WD Dau; K Daum; B Delcourt; R Demirchyan; A De Roeck; K Desch; EA De Wolf; C Diaconu; J Dingfelder; V Dodonov; A Dubak; C Duprel; G Eckerlin; V Efremenko; S Egli; R Eichler; F Eisele; A Ellerbrock; E Elsen; M Erdmann; W Erdmann; PJW Faulkner; L Favart; A Fedotov; R Felst; J Ferencei; M Fleischer; P Fleischmann; YH Fleming; G Flucke; G Flugge; A Fomenko; I Foresti; J Formanek; G Franke; G Frising; E Gabathuler; K Gabathuler; E Garutti; J Garvey; J Gayler; R Gerhards; C Gerlich; S Ghazaryan; A Glazov; L Goerlich; N Gogitidze; S Gorbounov; C Grab; H Grassler; T Greenshaw; M Gregori; G Grindhamnmer; C Gwilliam; D Haidt; L Hajduk; J Haller; Magnus Hansson; G Heinzelmann; RCW Henderson; H Henschel; O Henshaw; R Heremans; G Herrera; I Herynek; RD Heuer; A Hildebrandt; KH Hiller; P Hoting; D Hoffmann; R Horisberger; A Hovhannisyan; M Ibbotson; M Ismail; M Jacquet; L Janauschek; X Janssen; V Jemanov; Leif Jönsson; DP Johnson; Hannes Jung; D Kant; M Kapichine; Martin Karlsson; J Katzy; N Keller; J Kennedy; IR Kenyon; C Kiesling; M Klein; C Kleinwort; T Klimkovich; T Kluge; G Knies; Albert Knutsson; B Koblitz; V Korbel; P Kostka; R Koutouev; A Kropivnitskaya; J Kroseberg; J Kuckens; T Kuhr; MPJ Landon; W Lange; T Lastovicka; P Laycock; A Lebedev; B Leissner; R Lemrani; V Lendermann; S Levonian; L Lindfeld; K Lipka; B List; E Lobodzinska; N Loktionova; R Lopez-Fernandez; V Lubimov; H Lueders; D Luke; T Lux; L Lytkin; A Makankine; N Malden; E Malinovski; S Mangano; P Marage; J Marks; R Marshall; M Martisikova; HU Martyn; SJ Maxfield; D Meer; A Mehtar; K Meier; AB Meyer; H Meyer; J Meyer; S Michine; S Mikocki; I Milcewicz; D Milstead; A Mohamed; E Moreau; AH Morozov; IH Morozov; JV Morris; MU Mozer; K Muller; P Murin; V Nagovizin; B Naroska; J Naumann; T Naumann; PR Newman; C Niebuhr; A Nikiforov; D Nikitin; G Nowak; M Nozicka; R Oganezov; B Olivieri; JE Olsson; G Ossoskov; D Ozerov; C Pascaud; GD Patel; M Peez; E Perez; A Perieanu; A Petrukhin; D Pitzl; R Placakyte; R Poschl; B Portheault; B Povh; N Raicevic; Z Ratiani; P Reimer; B Reisert; A Rimmer; C Risler; E Rizvi; P Robmann; B Roland; R Roosen; A Rostovtsev; Z Rurikova; S Rusakov; K Rybicki; DPC Sankey; E Sauvan; S Schatzel; J Scheins; FP Schilling; P Schleper; S Schmidt; S Schmitt; M Schneider; L Schoeffel; A Schoning; V Schroder; HC Schultz-Coulon; C Schwanenberger; K Sedlak; E Sefkow; I Sheviakov; LN Shtarkov; Y Sirois; T Sloan; P Smirnov; Y Soloviev; D South; V Spaskov; A Specka; H Spitzer; R Stamen; B Stella; J Stiewe; I Strauch; U Straumann; V Tchoulakov; G Thompson; PD Thompson; F Tomasz; D Traynor; P Truol; G Tsipolitis; I Tsurin; J Turnau; E Tzamariudaki; A Uraev; M Urban; A Usik; D Utkin; S Valkar; A Valkarova; C Vallee; P Van Mechelen; N Van Remortel; AV Trevino; Y Vazdik; C Veelken; A Vest; S Vinokurova; V Volchinski; K Wacker; J Wagner; K Weber; R Weber; D Wegener; C Werner; N Werner; M Wessels; B Wessling; GG Winter; C Wissing; EE Woehrling; R Wolf; E Wunsch; S Xella; W Yan; V Yeganov; J Zacek; J Zalesak; Z Zhang; A Zhokin; H Zohrabyan; F Zomer
• Department/s: Particle and nuclear physics
• Publishing year: 2004
• Language: English
• Pages: 17-28
• Publication/Series: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 588
• Issue: 1-2
• Links: http://dx.doi.org/10.1016/j.physletb.2004.03.012
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693