Durham University

The Durham HepData Project

This site has now been superseded by the new hepdata.net site. Durham REACTION DATABASE Search Help

Help on Searching the Reaction Database (Back to the search page)

There are several ways in which data records can be located and displayed in the Reaction Database.
  • Standard Search Method
  • Form Search Method
  • Using a precompiled Data Review
  • From the "HepData" link in INSPIRE

Standard Search Method

To use this method enter your query string, comprised of keyword-value pairs, in the search box. All searches are case independent. The 'physics' keywords are reac, obs, sqrts, fsp, beam and targ which can be combined together with the boolean AND. The 'other' keywords are exp, date, ref, auth and ins. Note that in this category the only boolean combinations are date with exp or auth. Help on the values for the different keywords is available from the Browse section.

Descriptions of the keywords are:
"reac" (or "re") is one of the keywords to use to find data on a specific reaction. Reactions are written in the form "a b --> c d ..." where "a" and "b" are notionally called the beam and target particles, respectively, in the initial state, and "c" and "d" etc. are the final state particles. Because of the way the search is implemented the result is not dependent of the ordering within the final state. Note that the search match is exact and the truncation character '%' should be used to specify truncated reactions. Help on the particle vocabulary is available in the Browse section. An example would be "re e+ e- --> j/psi%" which would locate all data from E+ E+ interactions with a J/PSI particle in the final state.
"obs" is the keyword to use to specify a particular type of measurement or observable. It is often used in conjunction with the "reac" keyword. Typical values are "SIG", "DSIG/DT", "F2" and "POL". An example search would be "re e+ e- --> % and obs dsig/dx".
the "sqrts" keyword adds the centre-of-mass energy criteria to the search. The units are GeV. An example is "re pbar p% and sqrts 1800". Either ">" and "<" can also be used to specify lower and upper bounds to "sqrts".
the "fsp" keyword allows searching for data with a specific final-state particle.
the "beam" keyword allows searching for data with a specific beam particle.
the "targ" keyword allows searching for data with a specific target particle.
the "exp" (or "cn" or "de") keyword specifies the name of the experiment. It is a very loose search so only part of a name need be specified. For example "exp cern" would find all data in the database from CERN experiments while "de ALEPH" would only find data from the ALEPH experiment.
The "exp" keyword can be combined with the "date" using AND.
the "date" keyword specifies the year of the publication/preprint. It can be combined with "exp" and "auth".
the "ref" keyword specifies the publication or preprint.
For example:
ref arxiv:1401.7610
ref JHEP 1404%
ref PL% (all Physics Letters entries)
the "auth" keyword specifies the name of the first author on the publication.
The "auth" keyword can be combined with the "date" using AND.
the "ins" keyword is the Inspire record number.
In most of the keywords left and right truncation on the search can be made by using the "%" character at the beginning and end of the value string, respectively. However, when using the "reac" search care needs to be taken since each of the individual particles are treated separately in the query.

In addition to searching using the above query keywords, the search can be made using the Inspire query system. In particular, searching for a word from the title, any author name on the paper or for a specific Inspire keyword can be useful. For example:


The presence of the ":" in the search sends the query to Inspire which returns matching records in HepData.

Form Search Interface

In this interface the user is presented with a "form" to fill in. The fields in the form are essentially the keywords described in the Standard Search Method and are combined together with Boolean ANDs to make the search.

Data Reviews

The Durham HepData group maintains several on-line reviews of data in which the datasets from the Reaction Database are indexed by Experiment Name and Topic thus making the data easy to locate and display. To date the topics covered in the Data Reviews are (with direct links):


Finally, the INSPIRE bibliographic database contains a link "HepData" which accesses the corresponding data record in the HepData Reaction Database if it is available.

STFCIPPP HepData is funded by the UK STFC and hosted at the Durham IPPP.
HepData also maintains the UK mirror of the PDG.
This site has now been superseded by the new hepdata.net site.