Measurement of the primary Lund jet plane density in proton-proton collisions at s = 13 TeV

• Published in: The journal of high energy physics 2024-05, Vol.2024 (5), p.116
• Main Authors: Andrejkovic, J. W., Templ, S., Lowette, S., Tavernier, S., Postiau, N., Yi, K., Ban, Y., Fraga, J., Bargassa, P., Nandan, S., Zabi, A., Haeberle, R., El Mamouni, H., Feld, L., An, Y., Otarid, Y., Ranken, E., Shchedrolosiev, M., Zimermmane Castro Santos, A., Antonello, M., Bein, S., van der Linden, J., Chatzistavrou, T., Kamtsikis, C., Veres, G. I., Chaudhary, G., Chatterjee, R. M., Rastogi, A., My, S., Guiducci, L., Menasce, D., Iorio, A. O. M., Ardino, R., Fiorina, D., Donato, S., Verdini, P. G., Pastrone, N., Tornago, M., Moon, C. S., Lee, S., Yang, S., Tamulaitis, G., Kazana, M., Aguilar-Benitez, M., Cepeda, M., Fernández Ramos, J. P., Puerta Pelayo, J., Blanco Fernández, S., Gomez, G., Bianco, M., Cerminara, G., Forthomme, L., Giani, S., Pantaleo, F., Ebrahimi, A., Lustermann, W., Cormier, K., Mikuni, V. M., Sanchez Cruz, S., Chen, Z. g., Hsu, T. h., Li, Y. y., Demiroglu, Z. S., Tok, U. G., Sert, H., Glowacki, M., Vojinovic, M., Abdullin, S., Rumerio, P., Coubez, X., Cousins, R., Incandela, J., An, S., Green, D., Kwok, K. H. M., Adams, M. R., Hofman, D. J., Köseyan, O. K., Blumenfeld, B., Bean, A., Grove, D., Schroeder, N., Fangmeier, C., Pekkanen, J., Li, J., Nguyen, V., Yates, B. R., Stickland, D., Gutay, L., Virdi, A. K., Li, W., Lee, S. W., Mengke, T., Mallampalli, A., Aushev, T., Dubinin, M., Kachanov, V., Kozyrev, A., Lukina, O., Matveev, V.
• Format: Article
• Language: English
• Subjects: Charged particles; Classical and Quantum Gravitation; Collisions; Density; Elementary Particles; Emitters; Jet aircraft; Particle tracking; Physics; Physics and Astronomy; Protons; Quantum chromodynamics; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; String Theory; Transverse momentum
• ISSN: 1029-8479
• DOI: 10.1007/JHEP05(2024)116

A bstract A measurement is presented of the primary Lund jet plane (LJP) density in inclusive jet production in proton-proton collisions. The analysis uses 138 fb − 1 of data collected by the CMS experiment at s = 13 TeV. The LJP, a representation of the phase space of emissions inside jets, is constructed using iterative jet declustering. The transverse momentum k T and the splitting angle ∆ R of an emission relative to its emitter are measured at each step of the jet declustering process. The average density of emissions as function of ln( k T / GeV) and ln( R/ ∆ R ) is measured for jets with distance parameters R = 0 . 4 or 0.8, transverse momentum p T > 700 GeV, and rapidity | y | < 1 . 7. The jet substructure is measured using the charged-particle tracks of the jet. The measured distributions, unfolded to the level of stable charged particles, are compared with theoretical predictions from simulations and with perturbative quantum chromodynamics calculations. Due to the ability of the LJP to factorize physical effects, these measurements can be used to improve different aspects of the physics modeling in event generators.