Accès ouvert déclaré 2024 preprint

Charm fragmentation fractions and $\mathbf {c\overline{c}}$ cross section in p–Pb collisions at $\mathbf {\sqrt{s _{NN}}=5.02 TeV}$

Shreyasi Acharya, D. Adamová, Apar Agarwal, Gianluca Aglieri Rinella, Luca Aglietta, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, S. U. Ahn, I. Ahuja, A. Akindinov, Valentina Akishina, Mohammad Al-Turany, Dmitry Aleksandrov, B. Alessandro, H. M. Alfanda, Jose Ruben Alfaro Molina, Bushra Ali, A. Alici, N. Alizadehvandchali, A. Alkin, J. Alme, G. Alocco, T. Alt, Anna Rita Altamura, I. Altsybeev, Jesús Ricardo Alvarado García, C. Alvarez, Mustafa Anaam, Cristian Andrei, N. Andreou, A. Andronic, Evgeny Andronov, V. Anguelov, F. Antinori, P. Antonioli, N. Apadula, L. Aphecetche, Harald Appelshaeuser, C. Arata, S. Arcelli, M. Aresti, R. Arnaldi, Jhoao Gabriel Martins Campos Almeida Arneiro, Ionut Cristian Arsene, Mesut Arslandok, A. Augustinus, R. Averbeck, Dmitry Averyanov, M. D. Azmi, Hitoshi Baba, A. Badalà, Joonsuk Bae, Y. W. Baek, Xiaozhi Bai, R. Bailhache, Y. Bailung, Renu Bala, A. Balbino, Alberto Baldisseri, Bartosz Baliś, D. Banerjee, Z. Banoo, Veronika Barbasová, F. Barile, L. Barioglio, Maria Barlou, Banajit Barman, G. G. Barnaföldi, L. S. Barnby, Emilie Martine Barreau, Valerie Ramillien Barret, L. Barreto, C. Bartels, K. Barth, E. Bartsch, N. Bastid, S. Basu, G. Batigne, D. Battistini, B. Batyunya, Dibakar Bauri, Jose Luis Bazo Alba, I. G. Bearden, C. Beattie, P. Becht, D. Behera, I. Belikov, A. D. C. Bell Hechavarria, F. Bellini, R. Bellwied, Svetlana Nikolaevna Belokurova, Yael Antonio Vásquez Beltran, G. Bencédi, Adel Bensaoula, S. Beolè, Yaroslav A. Berdnikov, Anastasia Berdnikova, L. Bergmann, Mihaela Gabriela Besoiu, L. Betev, Partha Pratim Bhaduri, A. Bhasin, Buddhadeb Bhattacharjee, L. Bianchi, N. Bianchi, J. Bielčík, J. Bielčíková, Alexandre Patrick Bigot, A. Bilandzic, G. Bíró, S. Biswas, N. Bize, Justin Thomas Blair, D. Blau, Mihail Bogdan Blidaru, Nora Bluhme, C. Blume, G. Boca, F. Bock, T. Bodova, J. Bok, L. Boldizsár, M. Bombara, Peter Matthew Bond, G. Bonomi, H. Borel, A. Borissov, A. G. Borquez Carcamo, Hannah Bossi, E. Botta, Y. E. M. Bouziani, L. Bratrud, P. Braun‐Munzinger, M. Bregant, M. Broz, Giuseppe Eugenio Bruno, Valentin Dimitrov Buchakchiev, M. D. Buckland, D. Budnikov, H. Buesching, S. Bufalino, Paul Alois Buhler, N. Burmasov, Edith Zinhle Buthelezi, Aleksandr Bylinkin, S. A. Bysiak, Juan Carlos Cabanillas Noris, Maria Fernanda Torres Cabrera, Mengke Cai, Helen Louise Caines, A. Calivà, Ernesto Calvo Villar, J. M. M. Camacho, P. Camerini, Fabio de Moraes Canedo, Sierra Lisa Weyhmiller, Mihai Carabaș, Aitor Amatriain Carballo, F. Carnesecchi, R. Caron, L. A. D. Carvalho, J. Castillo Castellanos, Matteo Castoldi, F. Catalano, Samuele Cattaruzzi, Cesar Ceballos Sanchez, Rebecca Cerri, I. Chakaberia, Pritam Chakraborty, S. Chandra, S. Chapeland, M. Chartier, Souvik Chattopadhay, S. Chattopadhyay, S. Chattopadhyay, Meiyi Chen, T. Cheng, C. Cheshkov, Vasco Miguel Chibante Barroso, David Dobrigkeit Chinellato, E. S. Chizzali, J. Cho, S. Cho, P. Chochula, Zuzanna Anna Chochulska, Dhrubajyoti Choudhury, P. Christakoglou, C. H. Christensen, P. Christiansen, T. Chujo, M. Ciacco, C. Cicalò, Michael Rudolf Ciupek, Giulia Clai, F. Colamaria, Jonathan Samuel Colburn, D. Colella, M. Colocci, M. Concas, Gustavo Conesa Balbastre, Zaida Conesa Del Valle, G. Contin, Jesus Guillermo Contreras Nuno, M. L. Coquet, P. Cortese, M. R. Cosentino, Filippo Costa, S. Costanza, Corentin Cot, J. Crkovská, P. Crochet, R. Cruz-Torres, P. Cui, Maciej Marek Czarnynoga, A. Dainese, Gautam Dange, Meike Charlotte Danisch, A. Danu, P. Das, P. Das, S. Das, A. Dash, Sadhana Dash, Annalisa De Caro, G. de Cataldo, Jan De Cuveland, Alessandro De Falco, D. De Gruttola, N. De Marco, Chiara De Martin, S. De Pasquale, Rohaan Deb, R. Del Grande, L. Dello Stritto, W. Deng, Kyle Christian Devereaux, P. Dhankher, D. Di Bari, A. Di Mauro, Batoul Diab, Raul Arteche Diaz, T. Dietel, Yanchun Ding, J. Ditzel, R. Divià, Oeystein Djuvsland, U. Dmitrieva, Alexandru Florin Dobrin, Benjamin Dönigus, Jan Michal Dubinski, Andrea Dubla, P. 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Germain, Chandrasekhar Ghosh, Marco Giacalone, Giulia Gioachin, P. Giubellino, P. Giubilato, Aude Marie Camille Glaenzer, P. Glässel, E. Glimos, Daniel Jia Qin Goh, V. González, Pavel Gordeev, M. Gorgoń, Kangkan Goswami, S. Gotovac, Varlen Grabski, L. K. Graczykowski, E. Grecka, Alessandro Grelli, C. Grigoras, Vladislav Grigoryev, S. Grigoryan, F. Grosa, Jan Fiete Grosse-Oetringhaus, R. Grosso, D. Grund, Nadine Alice Gruenwald, Gabriel Garcia Guardiano, R. Guernane, M. Guilbaud, Kristjan Herlache Gulbrandsen, Jesper Jan Walter Karlsson Gumprecht, Tuba Gundem, T. Gunji, W. Guo, A. Gupta, R. Gupta, Rashi Gupta, K. Gwizdziel, L. Gyulai, Cynthia Marie Hadjidakis, Fakhar Ul Haider, Sara Haidlova, Mintu Haldar, H. Hamagaki, A. Hamdi, Y. Han, Brian Gerald Hanley, R. Hannigan, Joachim Hansen, M. R. Haque, John William Harris, A. Harton, Michael Volker Hartung, Hadi Hassan, Despina Hatzifotiadou, Philip Hauer, L. B. Havener, Ernst Hellbär, Haavard Helstrup, Marvin Hemmer, T. 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Yamaguchi, Seong Bae Yang, Satoshi YANO, Emma Rose Yeats, Zhongbao Yin, I.-K. Yoo, Jin Hee Yoon, Hyeonjin Yu, Shiming Yuan, Alperen Yüncü, Valentina Zaccolo, Chiara Zampolli, Mingyu Zhang, M. Zang, F. Zanone, Nima Zardoshti, Andrey Zarochentsev, P. Závada, Nikolay Zavyalov, Mikhail Zhalov, Biao Zhang, C. Zhang, L. Zhang, Maolin Zhang, Song Zhang, Xiaoming Zhang, Yifei Zhang, Z. Zhang, Mingrui Zhao, Vladimir Zherebchevskii, Zhi Yu, Daicui Zhou, You Zhou, J. Zhu, Senjie Zhu, Ya Zhu, Stefan Cristi Zugravel, Nicola Zurlo, ALICE Collaboration

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Le résumé fourni par la source

The total charm-quark production cross section per unit of rapidity $\textrm{d}\sigma ({{\textrm{c}}\overline{\textrm{c}}})/\textrm{d}y$, and the fragmentation fractions of charm quarks to different charm-hadron species $f(\textrm{c}\rightarrow {\textrm{h}}_{\textrm{c}})$, are measured for the first time in p–Pb collisions at $\sqrt{s_\textrm{NN}} = 5.02~\text {Te}\hspace{-1.00006pt}\textrm{V} $ at midrapidity ($-0.96 < y < 0.04$ in the centre-of-mass frame) using data collected by ALICE at the CERN LHC. The results are obtained based on all the available measurements of prompt production of ground-state charm-hadron species: $\textrm{D}^{0}$, $\textrm{D}^{+}$, $\textrm{D}_\textrm{s}^{+}$, and $\mathrm {J/\psi }$ mesons, and $\Lambda _\textrm{c}^{+}$ and $\Xi _\textrm{c}^{0}$ baryons. The resulting cross section is $ \textrm{d}\sigma ({{\textrm{c}}\overline{\textrm{c}}})/\textrm{d}y =219.6 \pm 6.3\;(\mathrm {stat.}) {\;}_{-11.8}^{+10.5}\;(\mathrm {syst.}) {\;}_{-2.9}^{+8.3}\;(\mathrm {extr.})\pm 5.4\;(\textrm{BR})\pm 4.6\;(\mathrm {lumi.}) \pm 19.5\;(\text {rapidity shape})+15.0\;(\Omega _\textrm{c}^{0})\;\textrm{mb} $, which is consistent with a binary scaling of pQCD calculations from pp collisions. The measured fragmentation fractions are compatible with those measured in pp collisions at $\sqrt{s} = 5.02$ and 13 TeV, showing an increase in the relative production rates of charm baryons with respect to charm mesons in pp and p–Pb collisions compared with $\mathrm {e^{+}e^{-}}$ and $\mathrm {e^{-}p}$ collisions. The $p_\textrm{T}$-integrated nuclear modification factor of charm quarks, $R_\textrm{pPb}({\textrm{c}}\overline{\textrm{c}})= 0.91 \pm 0.04\;\mathrm{(stat.)} ^{+0.08}_{-0.09}\;\mathrm{(syst.)} ^{+0.05}_{-0.03}\;\mathrm{(extr.)} \pm 0.03\;\mathrm{(lumi.)}$, is found to be consistent with unity and with theoretical predictions including nuclear modifications of the parton distribution functions.

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  • Laboratoire de Physique des 2 Infinis Irène Joliot-Curie pays non établi dans la notice
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Laboratoire de Physique Subatomique et des Technologies Associées, IMT Atlantique et Nantes Université, avec 9 autres affiliations.

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions
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