Search for single-top production in ep collisions at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 708:1-2 (2012) 27-36
Abstract:
A search for single-top production, ep→etX, has been performed with the ZEUS detector at HERA using data corresponding to an integrated luminosity of 0.37 fb -1. No evidence for top production was found, consistent with the expectation from the Standard Model. Limits were computed for single-top production via flavour changing neutral current transitions involving a neutral electroweak vector boson, γ or Z. The result was combined with a previous ZEUS result yielding a total luminosity of 0.50 fb -1. A 95% credibility level upper limit of 0.13 pb was obtained for the cross section at the centre-of-mass energy of √s=315 GeV. © 2012 Elsevier B.V.Combined inclusive diffractive cross sections measured with forward proton spectrometers in deep inelastic ep scattering at HERA
European Physical Journal C 72:10 (2012) 1-17
Abstract:
A combination of the inclusive diffractive cross section measurements made by the H1 and ZEUS Collaborations at HERA is presented. The analysis uses samples of diffractive deep inelastic ep scattering data at a centre-of-mass energy √s= 318 Gev where leading protons are detected by dedicated spectrometers. Correlations of systematic uncertainties are taken into account, resulting in an improved precision of the cross section measurement which reaches 6 % for the most precise points. The combined data cover the range 2.5 < Q2 < 200 GeV2 in photon virtuality, 0.00035 < xP < 0.09 in proton fractional momentum loss, 0.09 <{pipe}t{pipe}< 0.55 GeV2 in squared four-momentum transfer at the proton vertex and 0.0018 < β <0.816 in β=x/xP, where x is the Bjorken scaling variable. © 2012 The Author(s).Exclusive electroproduction of two pions at HERA
European Physical Journal C 72:1 (2012) 1-12
Abstract:
The exclusive electroproduction of two pions in the mass range 0.4Production of Z 0 bosons in elastic and quasi-elastic ep collisions at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (2012)
Scaled momentum distributions for KS0 and Λ/(Λ)over-bar in DIS at HERA
JOURNAL OF HIGH ENERGY PHYSICS (2012) ARTN 020