Machine Learning-Assisted Measurement of Lepton-Jet Azimuthal Angular Asymmetries in Deep-Inelastic Scattering at HERA
Year: 2024
Type: preprint
Abstract: In deep-inelastic positron-proton scattering, the lepton-jet azimuthal angular asymmetry is measured using data collected with the H1 detector at HERA. When the average transverse momentum of the lepton-jet system, $\lvert \vec{P}_\perp \rvert $, is much larger than the total transverse momentum of the system, $\lvert \vec{q}_\perp \rvert$, the asymmetry between parallel and antiparallel configurations, $\vec{P}_\perp$ and $\vec{q}_\perp$, is expected to be generated by initial and final state soft gluon radiation and can be predicted using perturbation theory. Quantifying the angular properties of the asymmetry therefore provides an additional test of the strong force. Studying the asymmetry is important for future measurements of intrinsic asymmetries generated by the proton's constituents through Transverse Momentum Dependent (TMD) Parton Distribution Functions (PDFs), where this asymmetry constitutes a dominant background. Moments of the azimuthal asymmetries are measured using a machine learning method for unfolding that does not require binning.
Authors: The H1 Collaboration, Andreev, V., Arratia, M., Baghdasaryan, A., Baty, A., Begzsuren, K., Bolz, A., Boudry, V., Brandt, G., Britzger, D., Buniatyan, A., Bystritskaya, L., Campbell, A. J., Avila, K. B. Cantun, Cerny, K., Chekelian, V., Chen, Z., Contreras, J. G., Cvach, J., Dainton, J. B., Daum, K., Deshpande, A., Diaconu, C., Drees, A., Eckerlin, G., Egli, S., Elsen, E., Favart, L., Fedotov, A., Feltesse, J., Fleischer, M., Fomenko, A., Gal, C., Gayler, J., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grindhammer, G., Haidt, D., Henderson, R. C. W., Hessler, J., Hladký, J., Hoffmann, D., Horisberger, R., Hreus, T., Huber, F., Jacobs, P. M., Jacquet, M., Janssen, T., Jung, A. W., Katzy, J., Kiesling, C., Klein, M., Kleinwort, C., Klest, H. T., Kogler, R., Kostka, P., Kretzschmar, J., Krücker, D., Krüger, K., Landon, M. P. J., Lange, W., Laycock, P., Lee, S. H., Levonian, S., Li, W., Lin, J., Lipka, K., List, B., List, J., Lobodzinski, B., Long, O. R., Malinovski, E., Martyn, H. -U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, J., Mikocki, S., Mikuni, V. M., Mondal, M. M., Müller, K., Nachman, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nowak, G., Olsson, J. E., Ozerov, D., Park, S., Pascaud, C., Patel, G. D., Perez, E., Petrukhin, A., Picuric, I., Pitzl, D., Radescu, V., Raicevic, N., Ravdandorj, T., Reichelt, D., Reimer, P., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rotaru, M., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schmookler, B. A., Schnell, G., Schoeffel, L., Schöning, A., Sefkow, F., Shushkevich, S., Soloviev, Y., Sopicki, P., South, D., Specka, A., Steder, M., Stella, B., Straumann, U., Sun, C., Sykora, T., Thompson, P. D., Acosta, F. Torales, Traynor, D., Tseepeldorj, B., Tu, Z., Tustin, G., Valkárová, A., Vallée, C., Van Mechelen, P., Wegener, D., Wünsch, E., Žáček, J., Zhang, J., Zhang, Z., Žlebčík, R., Zohrabyan, H., Zomer, F.
Institutions: Deutsches Elektronen-Synchrotron DESY, University of California, Riverside, A. Alikhanyan National Laboratory, University of Illinois Chicago, Mongolian Academy of Sciences, Institute of Physics and Technology, Laboratoire Leprince-Ringuet, Centre National de la Recherche Scientifique, École Polytechnique, Institut National de Physique Nucléaire et de Physique des Particules, University of Göttingen, University of Birmingham, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Palacký University Olomouc, Shandong University, Czech Academy of Sciences, FZU - Institute of Physics of the Czech Academy of Sciences, University of Liverpool, University of Wuppertal, Brookhaven National Laboratory, Centre de physique des particules de Marseille, Stony Brook University, Aix-Marseille Université, Paul Scherrer Institute, University of Antwerp, Interuniversity Institute for High Energies, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Université Paris-Saclay, Institute of Nuclear Physics, Polish Academy of Sciences, ETH Zurich, Lancaster University, University of Zurich, Heidelberg University, Lawrence Berkeley National Laboratory, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Purdue University West Lafayette, Argonne National Laboratory, University of London, Queen Mary University of London, University of Tennessee at Knoxville, Rice University, RWTH Aachen University, National Institute of Science Education and Research, European Organization for Nuclear Research, University of Siegen, University of Montenegro, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Rutherford Appleton Laboratory, Laboratoire d’Annecy de Physique des Particules, University of the Basque Country, Roma Tre University, Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Charles University, TU Dortmund University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Bundesministerium für Bildung und Forschung, Fonds De La Recherche Scientifique - FNRS, Fonds Wetenschappelijk Onderzoek, Consejo Nacional de Ciencia y Tecnología, Autoritatea Natională pentru Cercetare Stiintifică, Vlaamse regering, Office of Science, Science and Technology Facilities Council, Deutsches Elektronen-Synchrotron
Award: G6195709611
OpenAlex ID: W4405564205