Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use trackbased observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require ‘track functions’, which characterize the transverse momentum fraction 𝑟𝑞 carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of 𝑟𝑞 distributions in dijet events from the 140 fb−1 of proton–proton collisions at √𝑠 = 13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the 𝑟𝑞 distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Measurement of jet track functions in 𝑝𝑝 collisions at √𝑠 = 13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 868, 1-24 [10.1016/j.physletb.2025.139680].

Measurement of jet track functions in 𝑝𝑝 collisions at √𝑠 = 13 TeV with the ATLAS detector

Alberghi, G. L.;Alfonsi, F.;Ballabene, E.;Bellagamba, L.;Bianco, G.;Boscherini, D.;Bruni, A.;Carratta, G.;Corchia, F. A.;Cremonini, D.;De Castro, S.;Fabbri, F.;Fabbri, L.;Franchini, M.;Gabrielli, A.;Giacobbe, B.;Lasagni Manghi, F.;Levrini, G.;Nechaeva, S.;Polini, A.;Rinaldi, L.;Romano, M.;Sanzani, E.;Sbarra, C.;Sbrizzi, A.;Semprini-Cesari, N.;Sioli, M.;Todome, K.;Valentinetti, S.;Villa, M.;Vittori, C.;Vivarelli, I.;Zoccoli, A.;
2025

Abstract

Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use trackbased observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require ‘track functions’, which characterize the transverse momentum fraction 𝑟𝑞 carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of 𝑟𝑞 distributions in dijet events from the 140 fb−1 of proton–proton collisions at √𝑠 = 13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the 𝑟𝑞 distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.
2025
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Measurement of jet track functions in ���� collisions at √�� = 13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 868, 1-24 [10.1016/j.physletb.2025.139680].
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1045570
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