Search for new physics in e +/- q contact interactions at HERA

Summary, in English

Deep-inelastic e(+/-) p scattering at high squared momentum transfer Q(2) up to 30 000 GeV2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements dsigma / dQ(2), corresponding to integrated luminosities of 16.4 pb(-1) of e(-) p data and 100.8 pb(-1) of e(+) p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales A ranging between 1.6-5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3-1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of MS > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R-q < 1.0 10(-18) m. (C) 2003 Published by Elsevier B.V.

• Author: C Adloff; V Andreev; B Andrieu; T Anthonis; A Astvatsatourov; A Babaev; J Bahr; P Baranov; E Barrelet; W Bartel; S Baumgartner; J Becker; M Beckingham; A Beglarian; O Behnke; A Belousov; C Berger; I Berndt; JC Bizot; J Bohme; V Boudry; W Braunschweig; V Brisson; HB Broker; DP Brown; D Bruncko; FW Busser; A Bunyatyan; A Burrage; G Buschhorn; L Bystritskaya; AJ Campbell; S Caron; F Cassol-Brunner; V Chekelian; D Clarke; C Collard; JG Contreras; YR Coppens; JA Coughlan; MC Cousinou; BE Cox; G Cozzika; J Cvach; JB Dainton; WD Dau; K Daum; Mattias Davidsson; B Delcourt; N Delerue; R Demirchyan; A De Roeck; EA De Wolf; C Diaconu; J Dingfelder; P Dixon; V Dodonov; JD Dowell; A Droutskoi; A Dubak; C Duprel; G Eckerlin; D Eckstein; V Efremenko; S Egli; R Eichler; F Eisele; E Eisenhandler; M Ellerbrock; E Elsen; M Erdmann; W Erdmann; PJW Faulkner; L Favart; A Fedotov; R Felst; J Ferencei; S Ferron; M Fleischer; P Fleischmann; YH Fleming; G Flugge; A Fomenko; I Foresti; J Formadnek; G Franke; G Frising; E Gabathuler; K Gabathuler; J Garvey; J Gassner; J Gayler; R Gerhards; C Gerlich; S Ghazaryan; L Goerlich; N Gogitidze; C Grab; V Grabski; H Grassler; T Greenshaw; G Grindhammer; T Hadig; D Haidt; L Hajduk; J Haller; WJ Haynes; B Heinemann; G Heinzelmann; RCW Henderson; S Hengstmann; H Henschel; R Heremans; G Herrera; I Herynek; M Hildebrandt; M Hilgers; KH Hiller; J Hladky; P Hoting; D Hoffmann; R Horisberger; A Hovhannisyan; S Hurling; M Ibbotson; C Issever; M Jacquet; M Jaffre; L Janauschek; X Janssen; V Jemanov; Leif Jönsson; C Johnson; DP Johnson; MAS Jones; Hannes Jung; D Kant; M Kapichine; Martin Karlsson; O Karschnick; J Katzy; F Keil; N Keller; J Kennedy; IR Kenyon; C Kiesling; P Kjellberg; M Klein; C Kleinwort; T Kluge; G Knies; A Knutsson; B Koblitz; SD Kolya; V Korbel; P Kostka; SK Kotelnikov; R Koutouev; A Koutov; J Kroseberg; K Kruger; T Kuhr; D Lamb; MPJ Landon; W Lange; T Lastovicka; P Laycock; E Lebailly; A Lebedev; B Leissner; R Lemrani; V Lendermann; S Levonian; B List; E Lobodzinska; B Lobodzinski; A Loginov; N Loktionova; V Lubimov; S Luders; D Luke; L Lytkin; N Malden; E Malinovski; S Mangano; R Maracek; P Marage; J Marks; R Marshall; HU Martyn; J Martyniak; SJ Maxfield; D Meer; A Mehta; K Meier; AB Meyer; H Meyer; J Meyer; S Michine; S Mikocki; D Milstead; S Mohrdieck; MN Mondragon; F Moreau; A Morozov; JV Morris; K Muller; P Murin; V Nagovizin; B Naroska; J Naumann; T Naumann; PR Newman; F Niebergall; C Niebuhr; O Nix; G Nowak; M Nozicka; JE Olsson; D Ozerov; V Panassik; C Pascaud; GD Patel; M Peez; E Perez; A Petrukhin; JP Phillips; D Pitzl; R Poschl; I Potachnikova; B Povh; J Rauschenberger; P Reimer; B Reisert; C Risler; E Rizvi; P Robmann; R Roosen; A Rostovtsev; S Rusakov; K Rybicki; DPC Sankey; S Schatzel; J Scheins; FP Schilling; P Schleper; D Schmidt; D Schmidt; S Schmidt; S Schmitti; M Schneider; L Schoeffel; A Schoning; T Schorner-Sadenius; V Schroder; HC Schultz-Coulon; C Schwanenberger; K Sedlak; E Sefkow; I Sheviakov; LN Shtarkov; Y Sirois; T Sloan; P Smimov; Y Soloviev; D South; V Spaskov; A Specka; H Spitzer; R Stamen; B Stella; J Stiewe; I Strauch; U Straumann; S Tchetchelnitski; G Thompson; PD Thompson; F Tomasz; D Traynor; P Truol; G Tsipolitis; I Tsurin; J Turnau; JE Turney; E Tzamariudaki; A Uraev; M Urban; A Usik; S Valkar; A Valkarova; C Vallee; P Van Mechelen; AV Trevino; S Vassiliev; Y Vazdik; A Vest; A Vichnevski; K Wacker; J Wagner; R Wallny; B Waugh; G Weber; D Wegener; C Werner; N Werner; M Wessels; G White; S Wiesand; T Wilksen; M Winde; GG Winter; C Wissing; M Wobisch; EE Woehrling; E Wunsch; AC Wyatt; J Zacek; J Zalesak; Z Zhang; A Zhokin; F Zomer; M zur Nedden
• Department/s: Particle and nuclear physics
• Publishing year: 2003
• Language: English
• Pages: 35-47
• Publication/Series: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 568
• Issue: 1-2
• Links: http://dx.doi.org/10.1016/j.physletb.2003.06.034
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693