Measurement of dijet production at low Q(2) at HERA

Summary, in English

Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 < Q(2) < 80 GeV2, inelasticities 0.1 < y < 0.85, jet transverse energies E*(T1) > 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 < η(1)*, η(2)* < 0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production.

• 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; W Braunschweig; 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; J Chyla; C Collard; JG Contreras; YR Coppens; JA Coughlan; MC Cousinou; BE Cox; G Cozzika; J Cvach; JB Dainton; WD Dau; K Daum; B Delcourt; N Delerue; R Demirchyan; A De Roeck; K Desch; EA De Wolf; C Diaconu; J Dingfelder; V Dodonov; JD Dowell; A Dubak; C Duprel; G Eckerlin; V Efremenko; S Egli; R Eichler; F Eisele; M Ellerbrock; E Elsen; M Erdmanne; W Erdmann; PJW Faulkner; L Favart; A Fedotov; R Felst; J Ferencei; M Fleischer; P Fleischmann; YH Fleming; G Flucke; G Flugge; A Fomenko; L Foresti; J Formanek; G Ranke; G Frising; E Gabathuler; K Gabathuler; J Garvey; J Gassner; J Gayler; R Gerhards; C Gerlich; S Ghazaryan; L Goerlich; N Gogitidze; S Gorbounov; C Grab; V Grabski; H Grassler; T Greenshaw; M Gregori; G Grindhammer; D Haidt; L Hajduk; J Haller; G Heinzelmann; RCW Henderson; H Henschel; O Henshaw; R Heremans; G Herrera; I Herynek; RD Heuer; M Hildebrandt; KH Hiller; J Hladky; P Hoting; D Hoffmann; R Horisberger; A Hovhannisyan; M Ibbotson; M Ismail; M Jacquet; L Janauschek; X Janssen; V Jemanov; Leif Jönsson; C Johnson; 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 Kluge; G Knies; Albert Knutsson; B Koblitz; SD Kolya; 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; B List; E Lobodzinska; N Loktionova; R Lopez-Fernandez; V Lubimov; H Lueders; S Luders; D Luke; T Lux; L Lytkin; A Makankine; N Malden; E Malinovski; S Mangano; P Marage; J Marks; R Marshall; M Martisikova; HU Martyn; J Martyniak; SJ Maxfield; D Meer; A Mehta; K Meier; AB Meyer; H Meyer; J Meyer; S Michine; S Mikocki; I Milcewicz; D Milstead; F Moreau; A Morozov; I Morozov; JV Morris; M Mozer; K Muller; P Murin; V Nagovizin; B Naroska; J Naumann; T Naumann; PR Newman; C Niebuhr; D Nikitin; G Nowak; M Nozicka; B Olivier; JE Olsson; G Ossoskov; D Ozerov; C Pascaud; GD Patel; M Peez; E Perez; A Perieanu; A Petrukhin; D Pitzl; R Poschl; B Portheault; B Povh; N Raicevic; J Rauschenberger; P Reimer; B Reisert; C Risler; E Rizvi; P Robmann; 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; F 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; M Tasevsky; G Thompson; PD Thompson; F Tomasz; D Traynor; P Truol; G Tsipolitis; I Tsurin; J Turnau; E Tzamariudaki; A Uraev; M Urban; A Usik; S Valkar; A Valkarova; C Vallee; P Van Mechelen; AV Trevino; S Vassiliev; Y Vazdik; C Veelken; A Vest; A Vichnevski; S Vinokurova; V Volchinski; K Wacker; J Wagner; B Waugh; G Weber; R Weber; D Wegener; C Werner; N Werner; M Wessels; B Wessling; M Winde; GG Winter; C Wissing; EE Woehrling; E Wunsch; W Yan; J Zacek; J Zalesak; Z Zhang; A Zhokin; H Zohrabyan; F Zomer
• Department/s: Particle and nuclear physics
• Publishing year: 2004
• Language: English
• Pages: 141-159
• Publication/Series: European Physical Journal C. Particles and Fields
• Volume: 37
• Issue: 2
• Links: http://dx.doi.org/10.1140/epjc/s2004-01989-7
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044