A measurement of the angular structure of inclusive jets and those containing a prompt D-0 meson in proton-proton collisions at the LHC at a center-of-mass energy of 5.02TeV is presented. The data corresponding to an integrated luminosity of 301 pb(-1) were collected by the CMS experiment in 2017. Two jet grooming algorithms, late- k(T) and soft drop, are used to study the intrajet radiation pattern using iterative Cambridge-Aachen declustering. The splitting-angle distributions of jets with transverse momentum (pT) of around 100 GeV, obtained with these two algorithms, show that there is a shift of the distribution for jets containing a prompt D-0 meson with respect to inclusive jets. The suppression of emissions at small angles observed in the late- kT grooming approach is consistent with the dead-cone effect, whereas the similar suppression for splittings selected with the soft-drop algorithm appears to be induced by gluon splitting to charm quark-antiquark pairs at large angles. The measured distributions are corrected to the particle level and can be used to constrain model predictions for the substructure of high-p(T) charm quark jets.

Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., et al. (2026). Exploring small-angle emissions in charm quark jets in proton-proton collisions at √s=5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2026(5) [10.1007/JHEP05(2026)176].

Exploring small-angle emissions in charm quark jets in proton-proton collisions at √s=5.02 TeV

Ciocci, M. A.;Turini, N.;
2026-01-01

Abstract

A measurement of the angular structure of inclusive jets and those containing a prompt D-0 meson in proton-proton collisions at the LHC at a center-of-mass energy of 5.02TeV is presented. The data corresponding to an integrated luminosity of 301 pb(-1) were collected by the CMS experiment in 2017. Two jet grooming algorithms, late- k(T) and soft drop, are used to study the intrajet radiation pattern using iterative Cambridge-Aachen declustering. The splitting-angle distributions of jets with transverse momentum (pT) of around 100 GeV, obtained with these two algorithms, show that there is a shift of the distribution for jets containing a prompt D-0 meson with respect to inclusive jets. The suppression of emissions at small angles observed in the late- kT grooming approach is consistent with the dead-cone effect, whereas the similar suppression for splittings selected with the soft-drop algorithm appears to be induced by gluon splitting to charm quark-antiquark pairs at large angles. The measured distributions are corrected to the particle level and can be used to constrain model predictions for the substructure of high-p(T) charm quark jets.
2026
Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., et al. (2026). Exploring small-angle emissions in charm quark jets in proton-proton collisions at √s=5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2026(5) [10.1007/JHEP05(2026)176].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1324437