Measurement of Fc(c)over-bar(2) and Fb(b)over-bar(2) at low Q(2) and x using the H1 vertex detector at HERA

Summary, in English

Measurements are presented of inclusive charm and beauty cross sections in e(+)p collisions at HERA for values of photon virtuality 12 <= Q(2) = 60 GeV2 and of the Bjorken scaling variable 0.0002 <= x <= 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F-2(cc) and F-2(bb) are obtained. This is the first measurement of F-2(bb) in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and with previous measurements of F-2(cc).

• Author: A Aktas; V Andreev; T Anthonis; S Aplin; A Asmone; A Astvatsatourov; A Babaev; S Backovic; J Bahr; A Baghdasaryan; P Baranov; E Barrelet; W Bartel; S Baudrand; S Baumgartner; J Becker; M Beckingham; O Behnke; O Behrendt; A Belousov; C Berger; N Berger; JC Bizot; MO Boenig; V Boudry; J Bracinik; G Brandt; V Brisson; DP Brown; D Bruncko; FW Buesser; A Bunyatyan; G Buschhorn; L Bystritskaya; AJ Campbell; S Caron; F Cassol-Brunner; K Cerny; V Cerny; V Chekelian; JG Contreras; JA Coughlan; BE Cox; G Cozzika; J Cvach; JB Dainton; WD Dau; K Daum; Y de Boer; B Delcourt; A De Roeck; K Desch; EA De Wolf; C Diaconu; V Dodonov; A Dubak; G Eckerlin; V Efremenko; S Egli; R Eichler; F Eisele; M Ellerbrock; E Elsen; W Erdmann; S Essenov; A Falkewicz; PJW Faulkner; L Favart; A Fedotov; R Felst; J Ferencei; L Finke; M Fleischer; P Fleischmann; YH Fleming; G Flucke; A Fomenko; I Foresti; G Franke; T Frisson; E Gabathuler; E Garutti; J Gayler; C Gerlich; S Ghazaryan; S Ginzburgskaya; A Glazov; I Glushkov; L Goerlich; M Goettlich; N Gogitidze; S Gorbounov; C Goyon; C Grab; T Greenshaw; M Gregori; BR Grell; G Grindhammer; C Gwilliam; D Haidt; L Hajduk; Magnus Hansson; G Heinzelmann; RCW Henderson; H Henschel; O Henshaw; G Herrera; M Hildebrandt; KH Hiller; D Hoffmann; R Horisberger; A Hovhannisyan; T Hreus; S Hussain; M Ibbotson; M Ismail; M Jacquet; L Janauschek; X Janssen; V Jemanov; Leif Jönsson; DP Johnson; AW Jung; Hannes Jung; M Kapichine; J Katzy; N Keller; IR Kenyon; C Kiesling; M Klein; C Kleinwort; T Klimkovich; T Kluge; G Knies; Albert Knutsson; V Korbel; P Kostka; K Krastev; J Kretzschmar; A Kropivnitskaya; K Kruger; J Kuckens; MPJ Landon; W Lange; T Lastovicka; G Lastovicka-Medin; P Laycock; A Lebedev; G Leibenguth; V Lendermann; S Levonian; L Lindfeld; K Lipka; A Liptaj; B List; E Lobodzinska; N Loktionova; R Lopez-Fernandez; V Lubimov; AI Lucaci-Timoce; H Lueders; D Luke; T Lux; L Lytkin; A Makankine; N Malden; E Malinovski; S Mangano; P Marage; R Marshall; M Martisikova; HU Martyn; SJ Maxfield; D Meer; A Mehta; K Meier; AB Meyer; H Meyer; J Meyer; S Mikocki; I Milcewicz-Mika; D Milstead; D Mladenov; A Mohamed; F Moreau; A Morozov; JV Morris; MU Mozer; K Muller; P Murin; K Nankov; B Naroska; T Naumann; PR Newman; C Niebuhr; A Nikiforov; D Nikitin; G Nowak; M Nozicka; R Oganezov; B Olivier; JE Olsson; Sakar Osman; D Ozerov; V Palichik; I Panagoulias; T Papadopoulou; C Pascaud; GD Patel; M Peez; E Perez; D Perez-Astudillo; A Perieanu; A Petrukhin; D Pitzl; R Placakyte; B Portheault; B Povh; P Prideaux; N Raicevic; P Reimer; A Rimmer; C Risler; E Rizvi; P Robmann; B Roland; R Roosen; A Rostovtsev; Z Rurikova; S Rusakov; F Salvaire; PC Sankey; E Sauvan; S Schatzel; FP Schilling; S Schmidt; S Schmitt; C Schmitz; L Schoeffel; A Schoning; HC Schultz-Coulon; K Sedlak; F Sefkow; RN Shaw-West; I Sheviakov; LN Shtarkov; T Sloan; P Smirnov; Y Soloviev; D South; V Spaskov; A Specka; B Stella; J Stiewe; I Strauch; U Straumann; V Tchoulakov; G Thompson; PD Thompson; F Tomasz; D Traynor; P Truol; I Tsakov; G Tsipolitis; I Tsurin; J Turnau; E Tzamariudaki; M Urban; A Usik; D Utkin; S Valkar; A Valkarova; C Vallee; P Van Mechelen; AV Trevino; Y Vazdik; C Veelken; A Vest; S Vinokurova; V Volchinski; B Vujicic; K Wacker; J Wagner; G Weber; R Weber; D Wegener; C Werner; N Werner; M Wessels; B Wessling; C Wigmore; C Wissing; R Wolf; E Wuensch; S Xella; W Yan; V Yeganov; J Zacek; J Zalesak; Z Zhang; A Zhelezov; A Zhokin; YC Zhu; J Zimmermann; T Zimmermann; H Zohrabyan; F Zomer
• Department/s: Particle and nuclear physics
• Publishing year: 2006
• Language: English
• Pages: 23-33
• Publication/Series: European Physical Journal C. Particles and Fields
• Volume: 45
• Issue: 1
• Links: http://dx.doi.org/10.1140/epjc/s2005-02415-6
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044