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What is CMS?
What is CMS?
The Compact Muon Solenoid (CMS) is a general-purpose detector at the Large Hadron Collider (LHC). It has a broad physics program ranging from studying the Standard Model to searching for extra dimensions and particles that could make up dark matter. The CMS detector is built around a huge solenoid magnet. This takes the form of a cylindrical coil of superconducting cable that generates a field of 4 tesla, about 100,000 times the magnetic field of the Earth. The CMS experiment is one of the largest international scientific collaborations in history, involving about 5900 particle physicists, engineers, technicians, students and support staff from over 250 institutes in 59 countries as of June 2023.
How does it work?
In the simplest of terms, the CMS is made up of several detectors each of which detects a different type of particle from the collisions of particles done by the particle accelerator. We actually do not see what particles are made out of the collisions, since particles that are made from the collisions is extremely short-lived and decay into other particles before reaching the detector. Therefore, we only see the result of the collisions and much like a detective in a crime scene, we need to deduce what particles were produced in the collisions by seeing what particles were detected in the detector and with how much momentum the particles have
If you want to find out more about the CMS then please check out this website.
How to work with the data from CMS
How to work with the data from CMS
A walk through of the data format and how to use the provided python tools.
Need a Helping Hand with the CMS Dimuons Experiment?
Need a Helping Hand with the CMS Dimuons Experiment?
Don' know how many spikes are there?
Don' know how many spikes are there?
You should be able to see at least one very visible spike which indicates a particle is there. And there are two spikes that are not visible by looking at the full data and you'll need to zoom in to specific ranges to see the spikes to determine that there is a particle there!
Don't see the spikes you see for particles?
Don't see the spikes you see for particles?
Even when you zoom out? Try plotting your data on a wider mass range. Or a narrower mass range.
Don't know how to access the data in h5hep?
Don't know how to access the data in h5hep?
Pls refer to the "The Data Format and How to Interface with the Data!" Video and the "Data Interfacing Tutorial!" below the video in the Documentations and Help page
See a massive spike in the beginning of the graph?
See a massive spike in the beginning of the graph?
That is not a particle, that is just the random trend of particles. Since massive particles decay into smaller and smaller in the, there are more lower energy-momentum that is shown in a particle than higher end. Therefore, we need to look at the spikes going against the trend. Therefore, zoom in to see any spikes that goes against the local trend of the particles. It may seem small but it is indeed a particle.
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