A measurement of event-shape variables is presented, using a data sample produced in a special run with approximately one inelastic proton-proton collision per bunch crossing. The data were collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 64 μb−1. A number of observables related to the overall distribution of charged particles in the collisions are corrected for detector effects and compared with simulations. Inclusive event-shape distributions, as well as differential distributions of event shapes as functions of charged-particle multiplicity, are studied. None of the models investigated are able to satisfactorily describe the data. Moreover, there are significant features common amongst all generator setups studied, particularly showing data being more isotropic than any of the simulations. Multidimensional unfolded distributions are provided, along with their correlations.

Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J., et al. (2025). Measurement of event shapes in minimum-bias events from proton-proton collisions at √s = 13 TeV. PHYSICAL REVIEW D, 112(11) [10.1103/rqvb-gfb7].

Measurement of event shapes in minimum-bias events from proton-proton collisions at √s = 13 TeV

Xiao J.;Brivio F.;Cetorelli F.;Dinardo M. E.;Gerosa R.;Ghezzi A.;Govoni P.;Guzzi L.;Lavizzari G.;Lucchini M. T.;Malberti M.;Moroni L.;Paganoni M.;Palluotto S.;Perego A.;Pinolini B. S.;Pizzati G.;Ragazzi S.;Fatis T. T.;
2025

Abstract

A measurement of event-shape variables is presented, using a data sample produced in a special run with approximately one inelastic proton-proton collision per bunch crossing. The data were collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 64 μb−1. A number of observables related to the overall distribution of charged particles in the collisions are corrected for detector effects and compared with simulations. Inclusive event-shape distributions, as well as differential distributions of event shapes as functions of charged-particle multiplicity, are studied. None of the models investigated are able to satisfactorily describe the data. Moreover, there are significant features common amongst all generator setups studied, particularly showing data being more isotropic than any of the simulations. Multidimensional unfolded distributions are provided, along with their correlations.
Articolo in rivista - Articolo scientifico
proton-proton collisions
English
8-dic-2025
2025
112
11
112006
none
Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J., et al. (2025). Measurement of event shapes in minimum-bias events from proton-proton collisions at √s = 13 TeV. PHYSICAL REVIEW D, 112(11) [10.1103/rqvb-gfb7].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/594065
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