Light and charmed mesons and baryons are produced copiously in ep collisions with a centre-of-mass energy of 318GeV at HERA. During the first phase of the HERA operation (1992-2000), the ZEUS Collaboration accumulated a data sample corresponding to an integrated luminosity of ∼ 120 pb. Results on pentaquark searches, deuteron and antideuteron production and charmed-meson spectroscopy, obtained ...

The architecture of the ZEUS Micro Vertex Detector data acquisition system and the implementation of its second level trigger, the ZEUS Global Track Trigger are described. Data from the vertex detectors HELIX read-out chips, corresponding to 200k channels, are digitized by 3 crates of ADCs which perform noise and pedestal subtraction, and data suppression and compaction. PowerPC VME board compu...

Young, or newly evolved, genes arise ubiquitously across the tree of life, and can rapidly acquire novel functions that influence a diverse array of biological processes. Previous work identified a young regulatory gene in Drosophila, Zeus, which diverged rapidly from its parent Caf40 and took on roles in the male reproductive system. This neofunctionalization was accompanied by differential bi...

The two experimental groups at DESY, H1 and ZEUS, have reported some anomalous high Q events from the ep collider. The H1 has seen 12 neutral current events, at Q > 15,000 GeV 2 against the Standard Model(SM) prediction of 5 events 1 ; while the ZEUS has reported 5 events at Q >20,000 GeV 2 against the prediction 2 of 2. The excess of 7 events observed by H1 has clusterd around a common eq mass of

Recent results from the experiments ZEUS and H1 on charm production in ep collisions are reviewed. The topics are elastic and inelastic J/ψ photoproduction,D photoproduction differential cross sections and a first look at the proton structure function F cc̄ 2 . Invited talk presented at Les Rencontres de Physique de la Vallée d’Aoste: Results and Perspectives in Particle Physics, La Thuile, Ital...

Leonid Gladilin ∗ (on behalf of the ZEUS Collaboration) DESY, ZEUS experiment, Notkestr. 85, 22607 Hamburg, Germany E-mail: [email protected] Dijet angular distributions of photoproduction events in which a D meson is produced in association with one of two energetic jets have been measured using an integrated luminosity of 120 pb. The results are compared with predictions from leading-orde...

BACKGROUND The aim of this study was to detail the time-course, defined as the changes in end-tidal drug concentration with time, and consumption of inhaled anaesthetics when using a multifunctional closed-circuit anaesthesia machine in various drug delivery modes, and to compare it with a classical anaesthesia machine using an out-of-circle vaporizer under high and low fresh gas flow condition...

Events with isolated leptons and missing transverse momentum are searched for in electron– or positron–proton collisions at HERA by the H1 and ZEUS experiments. Such events may be explained within the Standard Model by W boson production, followed by leptonic decay. The analysis performed including HERA I and the recently collected data at HERA II results in clear evidence ofW production. Howev...

Algorithm animation is a form of program visualization that is concerned with dynamic and interactive graphical displays of a program’s fundamental operations. This paper describes the Zeus algorithm animation system. Zeus is noteworthy for its use of objects, strong-typing, and parallelism. Also of interest is how the system can be used for building multi-view editors. Review by Jim Meehan In ...