Higgs boson re-discovery from a CERN dataset (for a project)

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The discussion centers on a seminar project focused on rediscovering the Higgs boson using a CERN dataset. The user is struggling to identify the gap around the Higgs boson mass (125 GeV) in the invariant mass diagram and has not observed anything unusual in their histogram of Z boson invariant masses. Participants inquire about the dataset's size and analysis methods, suggesting that the Z peak appears too small to detect the Higgs boson. Clarifications are requested regarding the specific cuts used in the analysis and the dataset link. Understanding these details is crucial for accurately identifying the Higgs boson signature in the data.
omerel
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Homework Statement
Seminar Project
Relevant Equations
H -> ZZ -> 4l (muons)
Hi everyone!
I'm working on a seminar project on elementary particles, and I'm supposed to introduce the LHC and rediscover the Higgs boson from a dataset I got from CERN open source.
I don't understand how am I supposed to discover the gap (in the invariant mass diagram) around the Higgs boson mass (125 GeV).
I've watched CERN's official video on the Higgs discovery (Higgs boson decay to two photons), and several code implementations relevant to my problem (H->ZZ->4l) and couldn't understand the idea of how you actually see the gap around 125 GeV?
When I plot the histogram of Z boson invariant masses, I do not see anything unusual.
For your convenience, I attached two of my histograms- one for Z boson pairs invariant mass (i.e came from the same decay) and the second is the invariant mass of a single Z boson invariant mass. The invariant mass is in GeV units. pairs.PNG
 

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What is this gap you are talking about?

What is the dataset you are looking at? Is it big enough to see the Higgs? The Z peak seems awfully small.
 
Can you provide more information on how you analyzed the data? E.g. cuts used and so on. Also provide a link to the dataset

One Z is off shell so you can not write "invariant mass of two Z" here
 

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I want to find the solution to the integral ##\theta = \int_0^{\theta}\frac{du}{\sqrt{(c-u^2 +2u^3)}}## I can see that ##\frac{d^2u}{d\theta^2} = A +Bu+Cu^2## is a Weierstrass elliptic function, which can be generated from ##\Large(\normalsize\frac{du}{d\theta}\Large)\normalsize^2 = c-u^2 +2u^3## (A = 0, B=-1, C=3) So does this make my integral an elliptic integral? I haven't been able to find a table of integrals anywhere which contains an integral of this form so I'm a bit stuck. TerryW
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