CERN Accelerating science

Article
Report number arXiv:2303.13620 ; DESY-23-034
Title Unbinned deep learning jet substructure measurement in high Q2ep collisions at HERA
Related titleUnbinned Deep Learning Jet Substructure Measurement in High $Q^2$ ep collisions at HERA
Author(s)

Andreev, V. (Lebedev Inst.) ; Arratia, M. (UC, Riverside) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Baty, A. (Rice U.) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) ; Bolz, A. (DESY) ; Boudry, V. (LLR, Palaiseau) ; Brandt, G. (Gottingen U., II. Phys. Inst.) ; Britzger, D. (Munich, Max Planck Inst.) ; Buniatyan, A. (Birmingham U.) ; Bystritskaya, L. (Moscow, ITEP) ; Campbell, A.J. (DESY) ; Cantun Avila, K.B. (Merida, IPN) ; Cerny, K. (Palacky U.) ; Chekelian, V. (Munich, Max Planck Inst.) ; Chen, Z. (Shandong U.) ; Contreras, J.G. (Merida, IPN) ; Cunqueiro Mendez, L. (Oak Ridge) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Deshpande, A. (Stony Brook U.) ; Diaconu, C. (Marseille, CPPM) ; Drees, A. (Stony Brook U.) ; Eckerlin, G. (DESY) ; Egli, S. (PSI, Villigen) ; Elsen, E. (DESY) ; Favart, L. (Brussels U., IIHE) ; Fedotov, A. (Moscow, ITEP) ; Feltesse, J. (IRFU, SPP, Saclay) ; Fleischer, M. (DESY) ; Fomenko, A. (Lebedev Inst.) ; Gal, C. (Stony Brook U.) ; Gayler, J. (DESY) ; Goerlich, L. (Cracow, INP) ; Gogitidze, N. (Lebedev Inst.) ; Gouzevitch, M. (Lyon, IPN) ; Grab, C. (Zurich, ETH) ; Greenshaw, T. (Liverpool U.) ; Grindhammer, G. (Munich, Max Planck Inst.) ; Haidt, D. (DESY) ; Henderson, R.C.W. (Lancaster U.) ; Hessler, J. (DESY) ; Hladký, J. (Prague, Inst. Phys.) ; Hoffmann, D. (Marseille, CPPM) ; Horisberger, R. (PSI, Villigen) ; Hreus, T. (Zurich U.) ; Huber, F. (Heidelberg U.) ; Jacobs, P.M. (LBL, Berkeley) ; Jacquet, M. (IJCLab, Orsay) ; Janssen, T. (Brussels U., IIHE) ; Jung, A.W. (Purdue U.) ; Kapichine, M. (Dubna, JINR) ; Katzy, J. (DESY) ; Kiesling, C. (Munich, Max Planck Inst.) ; Klein, M. (Liverpool U.) ; Kleinwort, C. (DESY) ; Klest, H.T. (Stony Brook U.) ; Kogler, R. (DESY) ; Kostka, P. (Liverpool U.) ; Kretzschmar, J. (Liverpool U.) ; Krücker, D. (DESY) ; Krüger, K. (DESY) ; Landon, M.P.J. (Queen Mary, U. of London) ; Lange, W. (DESY, Zeuthen) ; Laycock, P. (Brookhaven) ; Lee, S.H. (Michigan U.) ; Levonian, S. (DESY) ; Li, W. (Rice U.) ; Lin, J. (Rice U.) ; Lipka, K. (DESY) ; List, B. (DESY) ; List, J. (DESY) ; Lobodzinski, B. (Munich, Max Planck Inst.) ; Long, O.R. (UC, Riverside) ; Malinovski, E. (Lebedev Inst.) ; Martyn, H.-U. (Aachen, Tech. Hochsch.) ; Maxfield, S.J. (Liverpool U.) ; Mehta, A. (Liverpool U.) ; Meyer, A.B. (DESY) ; Meyer, J. (DESY) ; Mikocki, S. (Cracow, INP) ; Mikuni, V.M. (LBL, Berkeley) ; Mondal, M.M. (Stony Brook U.) ; Morozov, A. (Dubna, JINR) ; Müller, K. (Zurich U.) ; Nachman, B. (LBL, Berkeley) ; Naumann, Th. (DESY, Zeuthen) ; Newman, P.R. (Birmingham U.) ; Niebuhr, C. (DESY) ; Nowak, G. (Cracow, INP) ; Olsson, J.E. (DESY) ; Ozerov, D. (PSI, Villigen) ; Park, S. (Stony Brook U.) ; Pascaud, C. (IJCLab, Orsay) ; Patel, G.D. (Liverpool U.) ; Perez, E. (CERN) ; Petrukhin, A. (Siegen U.) ; Picuric, I. (Montenegro U.) ; Pitzl, D. (DESY) ; Polifka, R. (Charles U.) ; Preins, S. (UC, Riverside) ; Radescu, V. (Oxford U.) ; Raicevic, N. (Montenegro U.) ; Ravdandorj, T. (Ulan Bator, Inst. Phys. Tech.) ; Reimer, P. (Prague, Inst. Phys.) ; Rizvi, E. (Queen Mary, U. of London) ; Robmann, P. (Zurich U.) ; Roosen, R. (Brussels U., IIHE) ; Rostovtsev, A. (Rutgers U., Piscataway ; IITP, Moscow) ; Rotaru, M. (Bucharest, IFIN-HH) ; Sankey, D.P.C. (Rutherford) ; Sauter, M. (Heidelberg U.) ; Sauvan, E. (Marseille, CPPM ; Annecy, LAPP) ; Schmitt, S. (DESY) ; Schmookler, B.A. (Stony Brook U.) ; Schnell, G. (Basque U., Bilbao) ; Schoeffel, L. (IRFU, SPP, Saclay) ; Schöning, A. (Heidelberg U.) ; Sefkow, F. (DESY) ; Shushkevich, S. (SINP, Moscow) ; Soloviev, Y. (Lebedev Inst.) ; Sopicki, P. (Cracow, INP) ; South, D. (DESY) ; Spaskov, V. (Dubna, JINR) ; Specka, A. (LLR, Palaiseau) ; Steder, M. (DESY) ; Stella, B. (Rome III U. ; INFN, Rome3) ; Straumann, U. (Zurich U.) ; Sun, C. (Stony Brook U.) ; Sykora, T. (Charles U.) ; Thompson, P.D. (Birmingham U.) ; Acosta, F. Torales (LBL, Berkeley) ; Traynor, D. (Queen Mary, U. of London) ; Tseepeldorj, B. (Ulan Bator, Inst. Phys. Tech. ; Ulaanbaatar U.) ; Tu, Z. (Brookhaven) ; Tustin, G. (Stony Brook U.) ; Valkárová, A. (Charles U.) ; Vallée, C. (Marseille, CPPM) ; Van Mechelen, P. (Brussels U., IIHE) ; Wegener, D. (Dortmund U.) ; Wünsch, E. (DESY) ; Žáček, J. (Charles U.) ; Zhang, J. (Shandong U.) ; Zhang, Z. (IJCLab, Orsay) ; Žlebčík, R. (Charles U.) ; Zohrabyan, H. (Yerevan Phys. Inst.) ; Zomer, F. (IJCLab, Orsay)

Publication 2023-07-31
Imprint 2023-03-23
Number of pages 25
Note 25 pages, 10 figures, 8 tables, version accepted by Physics Letters B
In: Phys. Lett. B 844 (2023) 138101
DOI 10.1016/j.physletb.2023.138101 (publication)
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment DESY HERA H1
Abstract The radiation pattern within high energy quark- and gluon-initiated jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators with numerous applications in high energy particle and nuclear physics. Looking at electron-proton collisions is of particular interest as many of the complications present at hadron colliders are absent. A detailed study of modern jet substructure observables, jet angularities, in electron-proton collisions is presented using data recorded using the H1 detector at HERA. The measurement is unbinned and multi-dimensional, using machine learning to correct for detector effects. All of the available reconstructed object information of the respective jets is interpreted by a graph neural network, achieving superior precision on a selected set of jet angularities. Training these networks was enabled by the use of a large number of GPUs in the Perlmutter supercomputer at Berkeley Lab. The particle jets are reconstructed in the laboratory frame, using the $k_{\mathrm{T}}$ jet clustering algorithm. Results are reported at high transverse momentum transfer $Q^2>150$ GeV${}^2$, and inelasticity $0.2 < y < 0.7$. The analysis is also performed in sub-regions of $Q^2$, thus probing scale dependencies of the substructure variables. The data are compared with a variety of predictions and point towards possible improvements of such models.
Copyright/License preprint: (License: arXiv nonexclusive-distrib 1.0)
publication: © 2023-2024 The Author(s) (License: CC BY 4.0), sponsored by SCOAP³



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