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Dec 14, 2022
CMS has now released the complete set of proton-proton data taken from LHC Run 1, including the original findings used in the Higgs boson discovery
Image above: A collision event recorded by CMS in 2012, available in the latest release of CMS open data (Image: CERN).
The CMS experiment is one of the largest international scientific collaborations in history, with a broad programme of activities at the forefront of particle physics research. As of 5 December 2022, all of the proton-proton data collected by CMS during Run 1 of the Large Hadron Collider (LHC) is now available through the CERN Open Data Portal. This completes the process that started in 2014 with the experiment’s very first open data release in experimental particle physics.
Completing the delivery of its Run 1 data within 10 years reaffirms the CMS collaboration’s commitment to an open data policy. This policy embodies values laid down in the CERN Convention, which states that all research undertaken at the Laboratory must be open and available to everyone.
The newly released CMS data consists of 42 collision datasets, representing a total of 491 terabytes, taken in early and late 2012 towards the end of LHC Run 1. This data includes some of the original findings from CMS that were used to confirm the existence of the Higgs boson, which earned François Englert and Peter Higgs the 2013 Nobel Prize in Physics.
Included in the release are examples of code used to extract physics. This software has been successfully used to demonstrate the intricacies of experimental particle data taking in the CMS Open Data workshops held over the last three years. In addition, the CMS Open Data guide covers details of how physics objects can be accessed using this software, giving users the possibility to expand on this sample code for studies of their own interest.
Adaptable software samples are one of the most efficient ways of passing on the knowledge needed for research on the CMS data. “The software included in this release helps us preserve the huge efforts of the CMS Run 1 data analysts,” says Julie Hogan, one of the key contributors to the CMS Open Data workshops.
”The code samples are essential ingredients for any serious effort to use this data for research,” adds Edgar Carrera, the lead organiser of the latest workshops. “We therefore do our best to allow users of the data to follow the original CMS procedures as closely as possible.”
The preparations for the next CMS data releases are under way. The collaboration looks forward to providing additional heavy-ion open data from Run 1 and to proceeding with further Run-2 releases.
Find out more about the CMS Open Data workshops in the video here:
CMS Open Data workshop 2022!
Note:
CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works. At CERN, the world’s largest and most complex scientific instruments are used to study the basic constituents of matter — the fundamental particles. By studying what happens when these particles collide, physicists learn about the laws of Nature.
The instruments used at CERN are particle accelerators and detectors. Accelerators boost beams of particles to high energies before they are made to collide with each other or with stationary targets. Detectors observe and record the results of these collisions.
Founded in 1954, the CERN Laboratory sits astride the Franco–Swiss border near Geneva. It was one of Europe’s first joint ventures and now has 23 Member States.
Related links:
CMS experiment: https://home.cern/science/experiments/cms
Large Hadron Collider (LHC): https://home.cern/science/accelerators/large-hadron-collider
CERN Open Data Portal: https://opendata.cern.ch/search?page=1&size=20&q=&type=Dataset&subtype=Collision&subtype=Simulated&experiment=CMS&year=2010&year=2011&year=2012&collision_type=pp
CMS Open Data guide: https://cms-opendata-guide.web.cern.ch/
CMS Open Data workshops: https://cms-opendata-guide.web.cern.ch/cmsOpenData/workshops/
Higgs boson: https://home.cern/science/physics/higgs-boson
For more information about European Organization for Nuclear Research (CERN), Visit: https://home.cern/
Image (mentioned), Video, Text, Credits: CERN/By CMS collaboration.
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