the durham hep database group
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10th May 2007 SLAC-PPA Summit 1
Mike WhalleyMike Whalley
Durham UniversityDurham University
M.R.Whalley@durham.ac.ukM.R.Whalley@durham.ac.uk
10th May 2007 SLAC-PPA Summit 2
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 Reaction Data Database & Data Reviews
Personnel involved:
Mike Whalley – DBM/Project ManagerJoanne Bentham – Database Assistant
Funded by PPARC(UK) STFC(UK)
The Durham HEP Database Group
PLUS……. UK Mirror Sites of…..
SLAC-SPIRES – (hep etc…) + LBNL Review of Particle Physics
Since ~ 1975 – originally mainly 2 body final state data …now….to compile ALL published data on HEP scattering cross sections etc..
“Products”
10th May 2007 SLAC-PPA Summit 3
Types of Particle Physics Data
Particle Properties Reaction (scattering)Bibliographic
MassesLifetimesSpin etc…
LBNL PDGSLAC spires/hep & arXiv archives
Cross SectionsPolarizationsEvent Shapesetc…. a b c d …
Durham “Reaction Data”
Database
Experimental and Theory papers
CDF (Fermilab) jet cross section
H1 (DESY) low-x F2 measurements
10th May 2007 SLAC-PPA Summit 4
SPIRESHEP
SPIRESHEP
PDG
PDG
ExperimentsJournals arXiv
Durham Data Compilers
Users
ReactionDatabase
Mirror
BDMS
UKMirrors
Reaction Data
Database
BDMS
Present
SLACBerkeley
Durham HEPDATA
DESYKeywords
10th May 2007 SLAC-PPA Summit 5
Reaction/Scattering Data - The Durham Database Group
~10,000 records(papers) -1970s-present data – currently ~150/year
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 & WeaknessesStrengths:•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 fromexperiments if only in plot form – verified by authors.
10th May 2007 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.
10th May 2007 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
10th May 2007 SLAC-PPA Summit 8
BDMS
SPIRESHEP
SPIRESHEP
PDG
PDG
Experiments
NewReactionDatabase
Journals arXiv
Durham Data Compilers
Users
Users
JetWeb
CEDARMC validation
Monte Carlosgenerate observeddistributions
ReactionDatabase
BDMS
MySQL
UKMirrors
OldReactionDatabase
Future
Java codeddata model
asciirootaidaxml
10th May 2007 SLAC-PPA Summit 9
CEDAR
+Combined E-science DAta Resource for HEP=
HEPDATA - Durham JETWEB - UCL
HEPDATA – archive ofHEP data.
JETWEB – a “tool” developedto facilitate the comparison andtuning of Monte Carlo programs(eg) PYTHIA, HERWIG etc.. withreal 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
10th May 2007 SLAC-PPA Summit 10
JETWEB
CEDAR workplan
HEPDATA
MC programsExperiments
Inputting data directly
USERS
CEDAR
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 andmaintenance of data bythe experiments.
Modify JETWEBto take data directlyfrom the new HEPDATA DB
Re-write HZTOOL in C++ to handle new MCs for LHC
Develop the GRID accessiblility
JETWEB uses Gridtechnology to runfitting jobs remotely
publicationsnetwork/grid
10th May 2007 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:
1. New Reaction Database – MySQL with Java based model.2. 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.
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