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Grid computing was developed to provide users with uniform access to large-scale distributed resources. This has worked well, however there are significant resources available to the scientific community that do not follow this paradigm-those on cloud infrastructure providers, HPC supercomputers or local clusters. DIRAC (Distributed Infrastructure with(More)
In deep inelastic neutral current scattering of positrons and protons at the center of mass energy of 300 GeV, we observe, with the ZEUS detector, events with a high energy neutron produced at very small scattering angles with respect to the proton direction. The events constitute a fixed fraction of the deep inelastic, neutral current event sample(More)
The LHCb grid software has been used for two Physics Data Challenges, the most recent of which will have produced 90 TB of data and required over 400 processor-years of computing power. This paper discusses the group's experience with developing Grid Services , interfacing to the LCG, running LHCb experiment software on the grid, and the integration of a(More)
Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e + + p → e + + n + jet + jet + X r have been measured with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb −1. The fraction of dijet events with a leading neutron in the final state was studied as a function of the jet kinematic(More)
The Cherenkov Telescope Array (CTA) observatory will be one of the biggest ground-based very-high-energy (VHE) γ-ray observatory. CTA will achieve a factor of 10 improvement in sensitivity from some tens of GeV to beyond 100 TeV with respect to existing telescopes. The CTA observatory will be capable of issuing alerts on variable and transient sources to(More)
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