Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $ \\sqrt{\\mathrm{s}} $ = 5.02 and 13 TeV
Shreyasi Acharya, Dagmar Adamova, Zaenal Akbar, Ante Bilandzic, Ran Xu, Arun Kumar Yadav, Serpil Yalcin Kuzu, Yorito Yamaguchi, Kosei Yamakawa, Shiming Yang, Satoshi YANO, Z. Yin, Hiroki Yokoyama, In Kwon Yoo, Gabor Biro, Jin Hee Yoon, Shiming Yuan, Alperen Yuncu, Valentina Zaccolo, Chiara Zampolli, Henrique Jose Correia Zanoli, Nima Zardoshti, Andrey Zarochentsev, Petr Zavada, Nikolay Zavyalov, Saikat Biswas, Mikhail Zhalov, Biao Zhang, S Sarah Zhang, X Q Zhang, Yifei Zhang, Vladimir Zherebchevskii, Zhi Yu, Natalia Zhigareva, Daicui Zhou, You Zhou, J Anthony Blair, Jianhui Zhu, Ya Zhu, A. Zichichi, Gennady Zinovjev, Nicola Zurlo, ALICE Collaboration, Dmitry Blau, Mihail Bogdan Blidaru, Christoph Blume, Gianluigi Boca, Friederike Bock, Alexey Bogdanov, Alexander Akindinov, Stefano Boi, Jeongsu Bok, Laszlo Boldizsar, Alexander Bolozdynya, Marek Bombara, Peter Matthew Bond, Germano Bonomi, Herve Borel, Alexander Borissov, Hannah Bossi, Mohammad Al-turany, Elena Botta, Lars Bratrud, Peter Braun-munzinger, Marco Bregant, Michal Broz, Giuseppe Eugenio Bruno, Matthew Daniel Buckland, Dmitry Budnikov, Henner Buesching, Stefania Bufalino, Sk Noor Alam, Ophélie Bugnon, Paul Alois Buhler, Edith Zinhle Buthelezi, Jamila Bashir Butt, Sebastian Adam Bysiak, Mengke Cai, Helen Louise Caines, Alberto Caliva, Ernesto Calvo Villar, Juan Manuel Mejia Camacho, Dmitry Aleksandrov, Rabi Soto Camacho, Paolo Camerini, Fabio De Moraes Canedo, F. Carnesecchi, Robin Albert Andre Caron, Javier Ernesto Castillo Castellanos, Ester Anna Rita Casula, Fabio Catalano, Cesar Ceballos Sanchez, Pritam Chakraborty, Bruno Alessandro, Sinjini Chandra, Sylvain Chapeland, Marielle Chartier, Subhasis Chattopadhyay, Sukalyan Chattopadhyay, Alex Henri Jean Chauvin, Tonatiuh Garcia Chavez, Tiantian Cheng, Cvetan Valeriev Cheshkov, Brigitte Cheynis, Haidar Mas'ud Alfanda, Vasco Miguel Chibante Barroso, David Dobrigkeit Chinellato, Soyeon Cho, Peter Chochula, Panagiotis Christakoglou, Christian Holm Christensen, Peter Christiansen, Tatsuya Chujo, Corrado Cicalo, L. Cifarelli, Jose Ruben Alfaro Molina, F. Cindolo, Michael Rudolf Ciupek, Giulia Clai, J. Cleymans, Fabio Filippo Colamaria, Jonathan Samuel Colburn, Domenico Colella, Alberto Collu, Manuel Colocci, Matteo Concas, Bushra Ali, Gustavo Conesa Balbastre, Zaida Conesa Del Valle, Giacomo Contin, Jesus Guillermo Contreras Nuno, Maurice Louis Coquet, Thomas Michael Cormier, Pietro Cortese, Mauro Rogerio Cosentino, Filippo Costa, Susanna Costanza, Yasir Ali, Philippe Crochet, Reynier Cruz Torres, Eleazar Cuautle Flores, Pengyao Cui, Leticia Cunqueiro Mendez, Andrea Dainese, Meike Charlotte Danisch, Andrea Danu, I. Das, Prottay Das, Alexander Adler, Andrea Alici, Prottoy Das, Supriya Das, Sadhana Dash, Sudipan De, Annalisa De Caro, G. de Cataldo, Lorenzo De Cilladi, Jan De Cuveland, Alessandro De Falco, Daniele De Gruttola, Negin Alizadehvandchali, Nora De Marco, Chiara De Martin, Salvatore De Pasquale, Suman Deb, H. F. Degenhardt, Kamil Rafal Deja, Luigi Dello Stritto, Silvia Delsanto, Wenjing Deng, Preeti Dhankher, Anton Alkin, Domenico Di Bari, Antonio Di Mauro, Raul Arteche Diaz, Thomas Dietel, Yanchun Ding, Roberto Divia, Dhruv Utpalkumar Dixit, Oeystein Djuvsland, Uliana Dmitrieva, Jaehyeon Do, Johan Alme, Alexandru Florin Dobrin, Benjamin Donigus, O. Dordic, Anand Kumar Dubey, Andrea Dubla, Sandeep Dudi, Dukhishyam Mallick, Pascal Dupieux, Natalia Dzalaiova, Tabea Maria Eder, Torsten Alt, Ehlers, Raymond James, III, Viljar Nilsen Eikeland, Florian Eisenhut, Domenico Elia, Barbara Ewa Erazmus, Francesca Ercolessi, Filip Erhardt, A. Erokhin, Magnus Rentsch Ersdal, Bruno Espagnon, L. Altenkamper, Giulio Eulisse, David Evans, Sergey Evdokimov, Laura Fabbietti, Mattia Faggin, Julien Faivre, Feng Fan, Alessandra Fantoni, Markus Fasel, P. Fecchio, Igor Altsybeev, Alessandro Feliciello, Grigorii Feofilov, Arturo Fernandez Tellez, Andrea Ferrero, Alessandro Ferretti, Victor Jose Gaston Feuillard, J. 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Le résumé fourni par la source
The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at $ \\sqrt{s} $ = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of $ \\mathcal{L} _{int}$ = 19.4 ± 0.4 nb$^{−1}$ and $ \\mathcal{L} _{int}$ = 32.2 ± 0.5 nb$^{−1}$ at $ \\sqrt{s} $ = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum p$_{T}$ = 2 GeV/c (1 GeV/c) at $ \\sqrt{s} $ = 5.02 TeV (13 TeV). The p$_{T}$ and rapidity (y) differential cross sections, as well as the corresponding values integrated over p$_{T}$ and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the p$_{T}$ and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the $ \\mathrm{b}\\overline{\\mathrm{b}} $ pair cross section at midrapidity and in the total phase space. The total $ \\mathrm{b}\\overline{\\mathrm{b}} $ cross sections are found to be $ {\\sigma}_{\\mathrm{b}\\overline{\\mathrm{b}}} $ = 541 ± 45 (stat.) ± 69 $ {\\left(\\mathrm{syst}.\\right)}_{-12}^{+10} $ (extr.) μb and $ {\\sigma}_{\\mathrm{b}\\overline{\\mathrm{b}}} $ = 218±37 (stat.)±31 $ {\\left(\\mathrm{syst}.\\right)}_{-9.1}^{+8.2} $ (extr.) μb at $ \\sqrt{s} $ = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at $ \\sqrt{s} $ = 13 TeV is also provided.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.