• Help
    Discussion forum
    Search tips
  • About
    CERN Open Data
    ALICE
    ATLAS
    CMS
    DELPHI
    LHCb
    OPERA
    TOTEM
    Glossary

Measurement of proton-proton elastic scattering and total cross-section at sqrt(s) = 7 TeV

TOTEM collaboration

Cite as: TOTEM collaboration (2024). Measurement of proton-proton elastic scattering and total cross-section at sqrt(s) = 7 TeV. CERN Open Data Portal. DOI:10.7483/OPENDATA.TOTEM.MSZI.XJ8R

Software Analysis Roman pot TOTEM


Description

The main goal of this analysis is to reproduce the 2011 analysis, which aimed to measure the differential elastic cross-section (𝑑𝜎/𝑑𝑡) of proton-proton collisions as a function of the four-momentum transfer squared |t|. Initial research by the TOTEM collaboration covered the |t| range from 0.36 to 2.5 GeV. By using a special beam optics configuration (𝛽∗ = 90 𝑚), they extended this range to as low as 2 ⋅ 10^-2 GeV. This wider range allowed extrapolation to |t| = 0, enabling the determination of the elastic and total cross-sections via the optical theorem for the first time at the LHC. This analysis improved the |t|-distribution measurement, achieving higher statistics and covering values down to 5 ⋅ 10^-3 GeV. The data was recorded in October 2011 at sqrt(s) = 7 TeV and is divided into three datasets, with Roman Pot detectors positioned at different distances from the beam. This setup enabled the observation of 91% of the elastic cross-section, an improvement over the 67% observed previously. While running the notebooks, new .root files are created, which are necessary for the subsequent steps of the analysis. The final plot is the proton-proton differential elastic scattering cross-section dependent on the four-momentum transfer squared |t|. The notebooks also calculate the total, elastic and inelastic cross-sections.

Use with

This analysis uses data from Roman Pots taken in 2011 at enegry 7 TeV.

Link to the dataset

Link to the article

Characteristics

6 files. 2.7 MiB in total.

System details

Jupyter Notebook
Python: version 3.9 - 3.12
External libraries: pyroot, numpy

How can you use this?

To open notebooks use any tool for reading and running Jupyter Notebooks. Recomended Python versions and needed libraries are specified in System Details section. Jupyter Notebooks load the files into a RDataFrame object for further analysis. Each step of the analysis produces result needed for next step. Notebooks are based on publication: "Measurement of proton-proton elastic scattering and total cross-section at sqrt(s) = 7 TeV" and Python implementation was made by: Paweł Kruczkiewicz, Piotr Sobczyński and Rafał Komuda.


      

Disclaimer

These open data are released under the Creative Commons Zero v1.0 Universal license.

Logo CC0-1.0

Neither the experiment(s) ( TOTEM ) nor CERN endorse any works, scientific or otherwise, produced using these data.

This release has a unique DOI that you are requested to cite in any applications or publications.

ALICE experiment
ATLAS experiment
CMS experiment
DELPHI experiment
LHCb experiment
OPERA experiment
PHENIX experiment
TOTEM experiment
© CERN, 2014–2025 ·
Terms of Use ·
Privacy Policy ·
Help ·
GitHub ·
Twitter ·
Email
Powered by Invenio
Open Data Portal v0.3.0
CERN