TY - JOUR
T1 - Search for QCD-instanton Induced Events in Eeep Inelastic ep Scattering at HERA
AU - ZEUS Collaboration
AU - Mattingly, Margarita C. K.
PY - 2004/5
Y1 - 2004/5
N2 - A search for QCD-instanton-induced events in deep inelastic ep scattering has been performed with the ZEUS detector at the HERA collider, using data corresponding to an integrated luminosity of 38 pb-1. A kinematic range defined by cuts on the photon virtuality, Q2 > 120 GeV 2, and on the Bjorken scaling variable, x > 10-3, has been investigated. The QCD-instanton induced events were modelled by the Monte Carlo generator QCDINS. A background-independent, conservative 95% confidence level upper limit for the instanton cross section of 26 pb is obtained, to be compared with the theoretically expected value of 8.9pb.
AB - A search for QCD-instanton-induced events in deep inelastic ep scattering has been performed with the ZEUS detector at the HERA collider, using data corresponding to an integrated luminosity of 38 pb-1. A kinematic range defined by cuts on the photon virtuality, Q2 > 120 GeV 2, and on the Bjorken scaling variable, x > 10-3, has been investigated. The QCD-instanton induced events were modelled by the Monte Carlo generator QCDINS. A background-independent, conservative 95% confidence level upper limit for the instanton cross section of 26 pb is obtained, to be compared with the theoretically expected value of 8.9pb.
UR - https://digitalcommons.andrews.edu/pubs/2066
U2 - 10.1140/epjc/s2004-01735-3
DO - 10.1140/epjc/s2004-01735-3
M3 - Article
VL - 34
SP - 255
EP - 265
JO - European Physical Journal C
JF - European Physical Journal C
IS - 3
ER -