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The Durham HEP Database Group

The Durham HEP Database Group. HEPDATA. Mike Whalley Durham University M.R.Whalley@durham.ac.uk. The Durham HEP Database Group. We are a small group based in the IPPP at Durham University in the UK, whose primary mission is the compilation of : HEP Reaction/Scattering Data

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The Durham HEP Database Group

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  1. The Durham HEP Database Group HEPDATA Mike Whalley Durham University M.R.Whalley@durham.ac.uk SLAC-PPA Summit

  2. The Durham HEP Database Group We are a small group based in the IPPP at Durham University in the UK, whose primary mission is the compilation of: HEPReaction/Scattering Data Reaction Data Database & Data Reviews Personnel involved: Mike Whalley – DBM/Project Manager Joanne Bentham – Database Assistant Funded by PPARC(UK) STFC(UK) “Products” Since ~ 1975 – originally mainly 2 body final state data …now…. to compile ALL published data on HEP scattering cross sections etc.. PLUS…….UK Mirror Sites of….. SLAC-SPIRES – (hep etc…) + LBNL Review of Particle Physics SLAC-PPA Summit

  3. Types of Particle Physics Data Particle Properties Bibliographic Reaction (scattering) Experimental and Theory papers Cross Sections Polarizations Event Shapes etc…. a b  c d … Masses Lifetimes Spin etc… SLAC spires/hep & arXiv archives LBNL PDG Durham “Reaction Data” Database CDF (Fermilab) jet cross section H1 (DESY) low-x F2 measurements SLAC-PPA Summit

  4. Present Journals arXiv Experiments Durham Data Compilers Durham HEPDATA BDMS Reaction Data Database Users UK Mirrors SPIRES HEP PDG Berkeley SLAC BDMS Reaction Database Mirror SPIRES HEP PDG DESY Keywords SLAC-PPA Summit

  5. Reaction/Scattering Data - The Durham Database Group WHY? Large amounts of money are spent on experiments to collect the data therefore efforts should be made to make sure it is not lost and available in the long term. Such a data store is essential if, for example, earlier and maybe lower energy data, as well as current data, are to be used in data/theory comparisons, tuning Monte Carlos and in designing new experiments. To provide an easy, and consistent, way of locating data. • Strengths & Weaknesses • Strengths: • Long term commitment • Done by physicists • Comprehensive coverage • Weaknesses: • Old DBMS • Limited output formats • Complicated search syntax • Lack of modern networking • Lack of personnel • (see future ….) Data from Journals – peer reviewed – (not prelim. or conf.) – direct from experiments if only in plot form – verified by authors. ~10,000 records(papers) -1970s-present data – currently ~150/year SLAC-PPA Summit

  6. Data Reviews Data Reviews • Since 1984 the HEPDATA group has produced and published reviews of “timely and topical” subsets of the data in the HEPDATA database. • Published in IoP Journal of Physics G and also since ~1995 on-line as web pages. • Enlist the help of experts in the particular subject. • The purpose is to provide a comprehensive “one place” archive of the data. • The on-line version is kept up-to-date as new data appear. • The process of producing the review also audits the database ensuring that it contains all the data on a particular topic. SLAC-PPA Summit

  7. The Durham-SPIRES connection < 1984 ppfs/ppas received as paper copies + QSPIRES (email) + STAIRS (at RAL) 1984 Durham HEPDATA group produced a database – using BDMS, - weekly ppfs and merging in the ppas. Accessible by logging into remote machines (with guest account) . ~1993 Moved to web based front end. Updating weekly, then eventually nightly – but just the ppf/ppa subset of the data. Added conference, hepnames, … 1999 Full mirror service developed – the cut-down version was not enough. 2006 Full rsync of all spires databases nightly. Uses ‘IRN’ as the link SLAC-PPA Summit Reaction Data

  8. BDMS BDMS Reaction Database Users Users CEDAR MC validation Journals arXiv Experiments Future ascii root aida xml Durham Data Compilers Monte Carlos generate observed distributions MySQL Java coded data model New Reaction Database Old Reaction Database JetWeb UK Mirrors SPIRES HEP PDG SPIRES HEP PDG SLAC-PPA Summit

  9. HEPDATA - Durham JETWEB - UCL + = Combined E-science DAta Resource for HEP CEDAR JETWEB – a “tool” developed to facilitate the comparison and tuning of Monte Carlo programs (eg) PYTHIA, HERWIG etc.. with real data HEPDATA – archive of HEP data. £350K over 3 years from the PPARC E-Science call to update and join these two together to make a powerful data/MC tuning resource for the start of the LHC SLAC-PPA Summit

  10. MC programs HEPDATA CEDAR workplan Experiments Inputting data directly CEDAR JETWEB uses Grid technology to run fitting jobs remotely network/grid publications JETWEB Design new (relational) DB schema. Migrate data to the new DBMS – MySQL Network new DB to JETWEB (or to any user’s programme!) Develop direct entry and maintenance of data by the experiments. Modify JETWEB to take data directly from the new HEPDATA DB Re-write HZTOOL in C++ to handle new MCs for LHC Develop the GRID accessiblility USERS SLAC-PPA Summit

  11. The Durham HEP Databse Group - Summary • Since 1975 – Data Compilation of all types of HEP scattering data • Products: • Reaction Data Database • Data Reviews • Maintain the UK Mirror sites of • SLAC/SPIRES • LBNL PDG web pages • Future: • New Reaction Database – MySQL with Java based model. • Expand output types : graphics, ascii, root, aida, xml, etc… • 3. Improve input methods (eg direct maintainence by expts(?)… • 4. Involvement with CEDAR (MC validation) project. SLAC-PPA Summit

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