Measurement of the energy density as a function of pseudorapidity in proton-proton collisions at $\sqrt{s} =$ 13 TeV
(2019) European Physical Journal C. Particles and Fields — Vol. C79, p. 391 (2019)
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- Abstract
- A measurement of the energy density in proton–proton collisions at a centre-of-mass energy of $\sqrt{s} =13$ $\,\text {TeV}$ is presented. The data have been marc:recorded with the CMS experiment at the LHC during low luminosity operations in 2015. The energy density is studied as a function of pseudorapidity in the ranges $-\,6.6<\eta <-\,5.2$ and $3.15<|\eta |<5.20$ . The results are compared with the predictions of several models. All the models considered suggest a different shape of the pseudorapidity dependence compared to that observed in the data. A comparison with LHC proton–proton collision data at $\sqrt{s} =0.9$ and $7\,\text {TeV} $ confirms the compatibility of the data with the hypothesis of limiting fragmentation.
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Bakhshiansohi, H., Bondu, O., Bruno, G., Caputo, C., David, P., Delaere, C., Delcourt, M., Giammanco, A., Krintiras, G., Lemaitre, V., Magitteri, A., Piotrzkowski, K., Saggio, A., Vidal Marono, M., Vischia, P., Zobec, J., CMS Collaboration, & et al. (2019). Measurement of the energy density as a function of pseudorapidity in proton-proton collisions at $\sqrt{s} =$ 13 TeV. European Physical Journal C. Particles and Fields, C79, 391. https://doi.org/10.1140/epjc/s10052-019-6861-x (Original work published 2019)