Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetries in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mat

A search for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> violation in <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msubsup><c:mi mathvariant="normal">Λ</c:mi><c:mi>b</c:mi><c:mn>0</c:mn></c:msubsup><c:mo stretchy="false">→</c:mo><c:mi>p</c:mi><c:msup><c:mi>K</c:mi><c:mo>−</c:mo></c:msup></c:math> and <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:msubsup><g:mi mathvariant="normal">Λ</g:mi><g:mi>b</g:mi><g:mn>0</g:mn></g:msubsup><g:mo stretchy="false">→</g:mo><g:mi>p</g:mi><g:msup><g:mi>π</g:mi><g:mo>−</g:mo></g:msup></g:math> decays is presented using the full Run 1 and Run 2 data samples of <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mi>p</k:mi><k:mi>p</k:mi></k:math> collisions collected with the LHCb detector, corresponding to an integrated luminosity of <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:mn>9</m:mn><m:mtext> </m:mtext><m:mtext> </m:mtext><m:msup><m:mi>fb</m:mi><m:mrow><m:mo>−</m:mo><m:mn>1</m:mn></m:mrow></m:msup></m:math> at center-of-mass energies of 7, 8, and 13 TeV. For the Run 2 data sample, the <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mi>C</o:mi><o:mi>P</o:mi></o:math>-violating asymmetries are measured to be <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:msubsup><q:mi>A</q:mi><q:mrow><q:mi>C</q:mi><q:mi>P</q:mi></q:mrow><q:mrow><q:mi>p</q:mi><q:msup><q:mi>K</q:mi><q:mo>−</q:mo></q:msup></q:mrow></q:msubsup><q:mo>=</q:mo><q:mo stretchy="false">(</q:mo><q:mo>−</q:mo><q:mn>1.4</q:mn><q:mo>±</q:mo><q:mn>0.7</q:mn><q:mo>±</q:mo><q:mn>0.4</q:mn><q:mo stretchy="false">)</q:mo><q:mo>%</q:mo></q:math> and <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" display="inline"><u:msubsup><u:mi>A</u:mi><u:mrow><u:mi>C</u:mi><u:mi>P</u:mi></u:mrow><u:mrow><u:mi>p</u:mi><u:msup><u:mi>π</u:mi><u:mo>−</u:mo></u:msup></u:mrow></u:msubsup><u:mo>=</u:mo><u:mo stretchy="false">(</u:mo><u:mn>0.4</u:mn><u:mo>±</u:mo><u:mn>0.9</u:mn><u:mo>±</u:mo><u:mn>0.4</u:mn><u:mo stretchy="false">)</u:mo><u:mo>%</u:mo></u:math>, where the first uncertainty is statistical and the second is systematic. Following significant improvements in the evaluation of systematic uncertainties compared to the previous LHCb measurement, the Run 1 dataset is reanalyzed to update the corresponding results. When combining the Run 2 and updated Run 1 measurements, the final results are found to be <y:math xmlns:y="http://www.w3.org/1998/Math/MathML" display="inline"><y:msubsup><y:mi>A</y:mi><y:mrow><y:mi>C</y:mi><y:mi>P</y:mi></y:mrow><y:mrow><y:mi>p</y:mi><y:msup><y:mi>K</y:mi><y:mo>−</y:mo></y:msup></y:mrow></y:msubsup><y:mo>=</y:mo><y:mo stretchy="false">(</y:mo><y:mo>−</y:mo><y:mn>1.1</y:mn><y:mo>±</y:mo><y:mn>0.7</y:mn><y:mo>±</y:mo><y:mn>0.4</y:mn><y:mo stretchy="false">)</y:mo><y:mo>%</y:mo></y:math> and <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"><cb:msubsup><cb:mi>A</cb:mi><cb:mrow><cb:mi>C</cb:mi><cb:mi>P</cb:mi></cb:mrow><cb:mrow><cb:mi>p</cb:mi><cb:msup><cb:mi>π</cb:mi><cb:mo>−</cb:mo></cb:msup></cb:mrow></cb:msubsup><cb:mo>=</cb:mo><cb:mo stretchy="false">(</cb:mo><cb:mn>0.2</cb:mn><cb:mo>±</cb:mo><cb:mn>0.8</cb:mn><cb:mo>±</cb:mo><cb:mn>0.4</cb:mn><cb:mo stretchy="false">)</cb:mo><cb:mo>%</cb:mo></cb:math>, constituting the most precise measurements of these asymmetries to date.

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Physical review. D/Physical review. D.
Published
2025-05-08
DOI
https://doi.org/10.1103/physrevd.111.092004
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9
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Particle physics theoretical and experimental studies
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article
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16.83

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Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetries in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mat

L. De Paula, A. Seuthe, I. Corredoira, M. M. Duras et al.
9 citations
Physical review. D/Physical review. D.
Particle physics theoretical and experimental studies
16.83
article

Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetries in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mat

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Polukhina, Ilya Segal, M. Charles, L. G. Scantlebury Smead, R. Williams, F. Ferreira Rodrigues, L. Kolk, Z. Xu, R. Quagliani, S. Cali, S. Easo, H. Sazak, J. Baptista de Souza Leite, A. Konoplyannikov, L. Toscano, A. Mauri, S. Poslavskii, B. Couturier, Dorothea Vom Bruch, B. Dey, X. Vilasís-Cardona, K. Liu, S. J. Jaimes Elles, A.-K. Guseinov, D. Nicotra, P. Collins, A. Berezhnoy, Z. Chen, C. Zhang, W. Byczynski, Louis Henry, P. Baladrón Rodríguez, H. Pereira Da Costa, A. D. Dowling, V. Shevchenko, M. Zdybał, Y. Fan, Zakariya Aliouche, R. Manera Escalero, J. J. Back, T. Miralles, Q. Li, D. Ilin, N. Valls Canudas, E. Kulikova, José Javier Saavedra-Arias, Miguel Ruiz Diaz, D. Miao, W. Krupa, F. Borgato, S. Barsuk, M. Schiller, Y. Zhao, L. Soares Lavra, U. Egede, S. Monteil, Q. Niu, J. T. Borsuk, P. R. Pais, P. Billoir, A. Obłąkowska-Mucha, Riccardo Nunzio Pilato, M. Merk, M. Pappagallo, M. Pizzichemi, A. Gioventù, N. Qin, I. R. Barbosa, L. Martinazzoli, Y. L. Liu, G. Meier, A. Biolchini, E. Rodriguez Fernandez, A. Rogovskiy, G. Benane, J. M. Otalora Goicochea, Z. Ghorbanimoghaddam, L. Congedo, Xutao Zheng, C. Betancourt, Ibrahim Chahrour, G. Martellotti, L. Garrido, A. Merli, T. Rong, M. Chefdeville, R. J. Hunter, E. Ben-Haim, W. Krzemień, A. Lampis, E. Golobardes, N. Kleijne, A. Usachov, T. Q. Gao, Tianyu Xing, J. Reich, S. Bachmann, J. W. Kautz, Anne Álvarez, F. Polci, G. Gong, C. Y. Yu, E. Vilella Figueras, M. Becker, B. Sciascia, M. Poli Lener, O. Kot, J. D. Brandenburg, J. M. De Miranda, A. Leflat, I. Gorelov, S. Legotin, G. Manca, W. Morren, B. Fang, Lauren Grace Mackey, E. Rodrigues, R. McNulty, Justin Bartz, O. Boente García, P. Carniti, J. Dalseno, C. Fitzpatrick, N. Harnew, D. Andreou, C. Landesa Gomez, F. M. Meng, S. Celani, X. Dai, R. Forty, D. Sundfeld, A. Zhelezov, H. Mu, P. Spradlin, T. Gershon, J. Wu, X. W. Wang, R. Song, G. Haefeli, F. L. Liu, A. Chubykin, P. Durante, M. Féo, Frédéric Hemmer, R. D. Moise, M. Kreps, N. Breer, A. 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Duda, P. d’Argent, J. P. Grabowski, A. Saputi, P. De Simone, L. Sun, L. Martel, X. Wang, T. Boettcher, L. Carcedo Salgado, G. Galati, Esteban Currás Rivera, Y. Gao, J. H. Lopes, X. Tong, J. García Pardiñas, S. Vecchi, C. Giugliano, N. V. Biesuz, L. Grillo, J. Daniel, Alexander Davidson, M. Borsato, Jike Wang, G. Bassi, D. H. Cámpora Pérez, D. Torres Machado, N. Skidmore, Paula Herrero Gascon, P. Koppenburg, J. F. Marchand, R. A. Ruiz Fernandez, S. Klaver, B. Adeva, M. J. Williams, X. Zhou, S. De Capua, A. Danilina, L. Shchutska, Vladimir Bocharnikov, S. Neubert, M. R. Kmiec, A. Lupato, M. Sarpis, M. De Cian, I. Bediaga, U. Marconi, M. Alexander, F. Lazzari, S. Cadeddu, L. Shekhtman, H. Bao, J. A. Gooding, C. Aidala, M. Kane, S. Gromov, F. C. R. Bishop, M. Rebollo De Miguel, S. Mariani, Graham Hallett, I. Kostiuk, J. J. Lane, S. Yang, C. Frei, K. De Bruyn, R. Bolzonella, J. Nicolini, J. Deng, M. Saur, Vasyl Dobishuk, E. Aslanides, C. Vrahas, J. Marks, T. Poeschl, T. Gys, B. Pagare, C. 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Greeven, L. N. Falcao, G. Passaleva, C. Santamarina Ríos, M. Wang, J. A. Boelhauve, R. Nandakumar, M. Zavertyaev, S. Schael, M. W. Dudek, H. K. Giemza, M. Hushchyn, M. Schmelling, M. Andreotti, K. Rinnert, K. Farmer, F. Keizer, P. Gandini, J. J. Malczewski, К. Ившин, G. Morello, M. Goncerz, K. Habermann, H. Van Hecke, F. Betti, J. S. Butter, A. C. dos Reis, H. Miao, A. Jawahery, E. Gabriel, Shah Rukh Qasim, F. Abudinén, G. Darze, Peilian Li, T. Skwarnicki, R. Lane, F. Teubert, M. Franco Sevilla, D. C. Craik, Nikolai Voropaev, M. Rama, D. Lancierini, D. S. Fitzgerald, V. Pugatch, T. Hadavizadeh, L. Fantini, M. Wilkinson, J. Ruiz Vidal, D. Lucchesi, G. Wang, E. Shmanin, Sonia Amina Bouchiba, H. Cai, Y. Li, O. Lantwin, V. Coco, E. Lemos Cid, S. Ding, J. Albrecht, L. Witola, A. Comerma-Montells, L. Cojocariu, F. Dettori, Z. Xiang, Rebecca Murta, R. Calabrese, S. Akar, L. Anderlini, J. Ellbracht, J. J. Saborido Silva, J. D. Shupperd, N. Serra, L. F. Foreman, A. Paul, A. 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Schmitz, T. H. Harris, T. Zhou, C. Lucarelli, S. Didenko, V. Romanovskiy, Chen Chen, L. Xu, E. Ejopu, C. Marín Benito, Roman Litvinov, G. Frau, A. Romero Vidal, Lucas George Girardey, O. Okhrimenko, N. Néri, N. K. Watson, F. F. Wilson, C. Bozzi, T. Latham, M. Rotondo, O. Steinkamp, M. S. Soares, M. Veltri, A. G. Morris, S. E. Clark, P. Vincent, K. Wyllie, C. Wang, Y. Shang, Marcelo Bovill, J. G. Speer, N. W. Wang, L. L. Pappalardo, K. Müller, O. Stenyakin, Saliha Bashir, J. A. de Vries, L. Tomassetti, V. Vagnoni, C. Parkes, X. R. Lyu, T. Szumlak, L. Eklund, K. Carvalho Akiba, Z. Yang, J. Van Eldik, R. Cardinale, L. Sestini, S. Chen, X. Wang, Y. Li, M. Andersson, Z. Wang, J. Wang, Shunan Zhang, L. Zhang, Q. Han, D. Ao, T. Shears, P. Gardner, A. Szabelski, Pol Vidrier Villalba, Simon Ghizzo, L. Guerry, Francesco Zenesini, Aleksandar Bordelius, Michal Krzysztof Kazanecki, O. Deschamps, C. Pappenheimer, A. M. Hennequin, Carlos Abellán Beteta, Thomas Peter Jones, S. Gomez Fernandez, M. 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article en
9 citations

Abstract

A search for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> violation in <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msubsup><c:mi mathvariant="normal">Λ</c:mi><c:mi>b</c:mi><c:mn>0</c:mn></c:msubsup><c:mo stretchy="false">→</c:mo><c:mi>p</c:mi><c:msup><c:mi>K</c:mi><c:mo>−</c:mo></c:msup></c:math> and <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:msubsup><g:mi mathvariant="normal">Λ</g:mi><g:mi>b</g:mi><g:mn>0</g:mn></g:msubsup><g:mo stretchy="false">→</g:mo><g:mi>p</g:mi><g:msup><g:mi>π</g:mi><g:mo>−</g:mo></g:msup></g:math> decays is presented using the full Run 1 and Run 2 data samples of <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mi>p</k:mi><k:mi>p</k:mi></k:math> collisions collected with the LHCb detector, corresponding to an integrated luminosity of <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:mn>9</m:mn><m:mtext> </m:mtext><m:mtext> </m:mtext><m:msup><m:mi>fb</m:mi><m:mrow><m:mo>−</m:mo><m:mn>1</m:mn></m:mrow></m:msup></m:math> at center-of-mass energies of 7, 8, and 13 TeV. For the Run 2 data sample, the <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mi>C</o:mi><o:mi>P</o:mi></o:math>-violating asymmetries are measured to be <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:msubsup><q:mi>A</q:mi><q:mrow><q:mi>C</q:mi><q:mi>P</q:mi></q:mrow><q:mrow><q:mi>p</q:mi><q:msup><q:mi>K</q:mi><q:mo>−</q:mo></q:msup></q:mrow></q:msubsup><q:mo>=</q:mo><q:mo stretchy="false">(</q:mo><q:mo>−</q:mo><q:mn>1.4</q:mn><q:mo>±</q:mo><q:mn>0.7</q:mn><q:mo>±</q:mo><q:mn>0.4</q:mn><q:mo stretchy="false">)</q:mo><q:mo>%</q:mo></q:math> and <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" display="inline"><u:msubsup><u:mi>A</u:mi><u:mrow><u:mi>C</u:mi><u:mi>P</u:mi></u:mrow><u:mrow><u:mi>p</u:mi><u:msup><u:mi>π</u:mi><u:mo>−</u:mo></u:msup></u:mrow></u:msubsup><u:mo>=</u:mo><u:mo stretchy="false">(</u:mo><u:mn>0.4</u:mn><u:mo>±</u:mo><u:mn>0.9</u:mn><u:mo>±</u:mo><u:mn>0.4</u:mn><u:mo stretchy="false">)</u:mo><u:mo>%</u:mo></u:math>, where the first uncertainty is statistical and the second is systematic. Following significant improvements in the evaluation of systematic uncertainties compared to the previous LHCb measurement, the Run 1 dataset is reanalyzed to update the corresponding results. When combining the Run 2 and updated Run 1 measurements, the final results are found to be <y:math xmlns:y="http://www.w3.org/1998/Math/MathML" display="inline"><y:msubsup><y:mi>A</y:mi><y:mrow><y:mi>C</y:mi><y:mi>P</y:mi></y:mrow><y:mrow><y:mi>p</y:mi><y:msup><y:mi>K</y:mi><y:mo>−</y:mo></y:msup></y:mrow></y:msubsup><y:mo>=</y:mo><y:mo stretchy="false">(</y:mo><y:mo>−</y:mo><y:mn>1.1</y:mn><y:mo>±</y:mo><y:mn>0.7</y:mn><y:mo>±</y:mo><y:mn>0.4</y:mn><y:mo stretchy="false">)</y:mo><y:mo>%</y:mo></y:math> and <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"><cb:msubsup><cb:mi>A</cb:mi><cb:mrow><cb:mi>C</cb:mi><cb:mi>P</cb:mi></cb:mrow><cb:mrow><cb:mi>p</cb:mi><cb:msup><cb:mi>π</cb:mi><cb:mo>−</cb:mo></cb:msup></cb:mrow></cb:msubsup><cb:mo>=</cb:mo><cb:mo stretchy="false">(</cb:mo><cb:mn>0.2</cb:mn><cb:mo>±</cb:mo><cb:mn>0.8</cb:mn><cb:mo>±</cb:mo><cb:mn>0.4</cb:mn><cb:mo stretchy="false">)</cb:mo><cb:mo>%</cb:mo></cb:math>, constituting the most precise measurements of these asymmetries to date.

Physical review. D/Physical review. D.Vol. 111(9)
University College Dublin (IE), Eötvös Loránd University (HU), Universidade da Coruña (ES), Universidade Federal do Rio de Janeiro (BR), Uppsala University (SE), Jagiellonian University (PL), Rutherford Appleton Laboratory (GB), Los Alamos National Laboratory (US), University of Bonn (DE), University of Liverpool (GB), Universitat de València (ES), University of Freiburg (DE), Hunan University (CN), University of Groningen (NL), South China Normal University (CN), Université Clermont Auvergne (FR), Universidade de Santiago de Compostela (ES), TU Dortmund University (DE), Peking University (CN), University of Zurich (CH), Aix-Marseille Université (FR), Heidelberg University (DE), University of Cambridge (GB), Cracow University of Technology (PL), Pontifícia Universidade Católica do Rio de Janeiro (BR), Université Paris-Saclay (FR), University of Michigan (US), Kharkiv Institute of Physics and Technology (UA), Australian Regenerative Medicine Institute (AU), University of Manchester (GB), Maastricht University (NL), University of Bristol (GB), Universidad Nacional de Colombia (CO), Wuhan University (CN), University of Warwick (GB), Sorbonne Université (FR), University of Oxford (GB), Central China Normal University (CN), Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO), National Institute for Subatomic Physics (NL), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Institute of Nuclear Physics, Polish Academy of Sciences (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Bari (IT), Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata (IT), FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ), Centro Brasileiro de Pesquisas Físicas (BR), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (IT), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Laboratoire Leprince-Ringuet (FR), Max Planck Institute for Nuclear Physics (DE), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Pisa (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Consejo Nacional de Rectores, Laboratoire Médiations (FR), Imperial College London (GB), The Ohio State University (US), Universitat Ramon Llull (ES), Monash University (AU), University of Cincinnati (US), Massachusetts Institute of Technology (US), University of Maryland, College Park (US), European Organization for Nuclear Research (CH), AGH University of Krakow (PL), Université Savoie Mont Blanc (FR), Syracuse University (US), Universitat de Barcelona (ES), Lanzhou University (CN), University of Glasgow (GB), University of Birmingham (GB), RWTH Aachen University (DE), Ruhr University Bochum (DE), University of Edinburgh (GB), Tsinghua University (CN)
National Science Foundation, U.S. Department of Energy, Semiconductor Research Corporation, International Council of Shopping Centers Educational Foundation, Alexander von Humboldt-Stiftung, CERN, UK Research and Innovation, Ministerul Cercetării, Inovării şi Digitalizării, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei', Leverhulme Trust, Royal Society, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Bundesministerium für Bildung und Forschung, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Narodowe Centrum Nauki, Ministerstwo Edukacji i Nauki, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Academy of Sciences of Ukraine, Centre National de la Recherche Scientifique, Financiadora de Estudos e Projetos, Région Auvergne-Rhône-Alpes, CAS Center for Excellence in Particle Physics, Institutul de Fizică Atomică, Australian Research Data Commons, Science and Technology Facilities Council, Australian Research Council, Deutsches Elektronen-Synchrotron, Instituto Nazionale di Fisica Nucleare, Agencia Estatal de Investigación, Institute of High Energy Physics, Fundamental Research Funds for the Central Universities, Institut National de Physique Nucléaire et de Physique des Particules, Nuclear Physics, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions
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