Leptoquarks and Compositeness Scales from a Contact Interaction Analysis of Deep Inelastic.pdf

DESY hepexyymmnn April Lepto quarks and Comp ositeness Scales from a Contact Interaction Analysis of Deep Inelastic e p Scattering at HERA H Collab oration ISSN DESY ISSN April Lepto quarks and Comp ositeness Scales from a Contact Interaction Analysis of Deep Inelastic e p Scattering at HERA H Collab oration Abstract A contact interaction analysis is presented to search for new phenomena   b eyond the Standard Mo del in deep inelastic e p e hadr ons scattering The data are collected with the H detector at HERA and corresp ond to integrated luminosities of pb and pb for electron and p ositron b eams resp ec tively The dierential cross sections d dQ are measured in the Q range b etween GeV and GeV The absence of any signicant deviation from the Standard Mo del prediction is used to constrain the couplings and masses of new lepto quarks and to set limits on electronquark comp ositeness scales and on the radius of light quarks S Aid V Andreev B Andrieu RD Appuhn M Arpagaus A Babaev J Bahr J Ban Y Ban P Baranov E Barrelet R Barschke W Bartel M Barth U Bassler HP Beck HJ Behrend A Belousov Ch Berger