Search for contact interactions, large extra dimensions and finite quark radius in ep collisions at HERA
ArXiv hep-ex/0401009 (2004)
High-Q^2 neutral current cross sections in e^+p deep inelastic scattering at sqrt{s}=318 GeV
ArXiv hep-ex/0401003 (2004)
High-Q2 neutral current cross sections in e+ p deep inelastic scattering at √s = 318 GeV
Physical Review D - Particles, Fields, Gravitation and Cosmology 70:5 (2004)
Abstract:
Cross sections for e+ p neutral current deep inelastic scattering have been measured at a center-of-mass energy of √s = 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 63.2 pb -1. The double-differential cross section, d2σ/ dxdQ2, is presented for 200 GeV2 < Q2 < 30 000 GeV2 and for 0.005 < x < 0.65. The single-differential cross sections dσ/dQ2, dσ/dx and dσ/dy are presented for Q2 > 200 GeV2. The effect of Z-boson-exchange is seen in dσ/dx measured for Q2 > 10 000 GeV2. The data presented here were combined with ZEUS e+ p neutral current data taken at √s = 300 GeV and the structure function F2em was extracted. All results agree well with the predictions of the Standard Model.Observation of KS 0KS 0 resonances in deep inelastic scattering at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 578:1-2 (2004) 33-44
Abstract:
Inclusive Ks0Ks0 production in deep inelastic ep scattering at HERA has been studied with the ZEUS detector using an integrated luminosity of 120 pb-1. Two states are observed at masses of 1537-8-9 MeV and 1726 ± 7 MeV, as well as an enhancement around 1300 MeV. The state at 1537 MeV is consistent with the well established f′2(1525). The state at 1726 MeV may be the glueball candidate f0(1710). However, it's width of 38 -14-20 MeV is narrower than 125 ± 10 MeV observed by previous experiments for the f0(1710). © 2003 Elsevier B.V. All rights reserved.Bottom photoproduction measured using decays into muons in dijet events in ep collisions at √s=318 GeV -: art. no. 012008
PHYSICAL REVIEW D 70:1 (2004) ARTN 012008