Multi-Lepton and Isolated Lepton Events at HERA

Measurements of the production of events containing isolated high energy leptons (electrons and muons) produced in ep collisions have been performed with the H1 and ZEUS detectors at HERA, using data collected in the period 1994-2007. Topologies with more than one charged lepton or with a charged lepton in coincidence with missing transverse momentum are analysed. The H1 and ZEUS data, corresponding to an integrated luminosity of about 0.5 fb^-1 per experiment, are combined in a common phase space. The observed event yields are compared to the predictions from the Standard Model. In general a good agreement is found, where the expectation is dominated by photon-photon collisions for the multi-lepton topologies and by single W production in the case of events with an isolated electron or muon and missing transverse momentum. Events with large transverse momentum are observed. Total and differential cross sections of these processes are measured.Comment: Proceedings of the talk given at The 2009 Europhysics Conference on High Energy Physics (EPS-HEP 2009), 16-22 July 2009, Krakow, Poland. 4 pages, 3 figures; one style file, one log

DPHEP: From Study Group to Collaboration

The international study group on data preservation in high energy physics, DPHEP, achieved a milestone in 2012 with the publication of its eagerly anticipated large scale report, which contains a description of data preservation activities from all major high energy physics collider-based experiments and laboratories. DPHEP will evolve to a new collaboration structure in 2013. The formation of the study group is described, as well as some of the key messages from the report focussing on the physics case for the preservation of high energy physics data and a description of the different preservation models. Finally, the future working directions of the new collaboration are outlined.Comment: 6 pages, 5 figures. Proceedings of a parallel talk given at EPS-HEP 2013, July, Stockholm as well as at DIS 2013, April, Marseille

A Validation Framework for the Long Term Preservation of High Energy Physics Data

The study group on data preservation in high energy physics, DPHEP, is moving to a new collaboration structure, which will focus on the implementation of preservation projects, such as those described in the group's large scale report published in 2012. One such project is the development of a validation framework, which checks the compatibility of evolving computing environments and technologies with the experiments software for as long as possible, with the aim of substantially extending the lifetime of the analysis software, and hence of the usability of the data. The framework is designed to automatically test and validate the software and data of an experiment against changes and upgrades to the computing environment, as well as changes to the experiment software itself. Technically, this is realised using a framework capable of hosting a number of virtual machine images, built with different configurations of operating systems and the relevant software, including any necessary external dependencies.Comment: Proceedings of a poster presented at CHEP 2013, Amsterdam, October 14-18 201

Need to Know Review Number two: What Local Government Needs to Know about Public Health

This review of existing research on local government and public health focuses on the leadership role of local government in developing local public health systems that are capable of addressing the wider determinants of health