Measurement of beauty production via non-prompt ${\rm D}^{0}$ mesons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

• Published in: The journal of high energy physics Vol. 12
• Main Authors: Acharya, Shreyasi, Adamova, Dagmar, Adler, Alexander, Adolfsson, Jonatan, Aglieri Rinella, Gianluca, Agnello, Michelangelo, Agrawal, Neelima, Ahammed, Zubayer, Ahmad, Shakeel, Ahn, Sang Un, Ahuja, Ishaan, Akbar, Zaenal, Akindinov, Alexander, Al-Turany, Mohammad, Alam, Sk Noor, Aleksandrov, Dmitry, Alessandro, Bruno, Alfanda, Haidar Mas'Ud, Alfaro Molina, Jose Ruben, Ali, Bushra, Ali, Yasir, Alici, Andrea, Alizadehvandchali, Negin, Alkin, Anton, Alme, Johan, Alocco, Giacomo, Alt, Torsten, Altsybeev, Igor, Anaam, Mustafa, Andrei, Cristian, Andronic, Anton, Anguelov, Venelin, Antinori, Federico, Antonioli, Pietro, Chandra, Anuj, Apadula, Nicole, Aphecetche, Laurent Bernard, Appelshaeuser, Harald, Arcelli, Silvia, Arnaldi, Roberta, Arsene, Ionut Cristian, Arslandok, Mesut, Augustinus, Andre, Averbeck, Ralf Peter, Aziz, Sizar, Azmi, Mohd Danish, Badala, Angela, Baek, Yongwook, Bai, Xiaozhi, Bailhache, Raphaelle Marie, Bailung, Yoshini, Bala, Renu, Balbino, Alessandro, Baldisseri, Alberto, Balis, Bartosz, Banerjee, Debjani, Banoo, Zarina, Barbera, Roberto, Barioglio, Luca, Barlou, Maria, Barnafoldi, Gergely Gabor, Barnby, Lee Stuart, Ramillien Barret, Valerie, Bartels, Clara, Barth, Klaus, Bartsch, Esther, Baruffaldi, Filippo, Bastid, Nicole, Basu, Sumit, Batigne, Guillaume, Battistini, Daniel, Batyunya, Boris, Bauri, Dibakar, Bazo Alba, Jose Luis, Bearden, Ian Gardner, Beattie, Caitlin, Becht, Pascal, Belikov, Iouri, Bell Hechavarria, A.D. C., Bellini, Francesca, Bellwied, Rene, Belokurova, Svetlana, Belyaev, Vladimir, Bencedi, Gyula, Beole, Stefania Maria, Bercuci, Alexandru, Berdnikov, Yaroslav, Berdnikova, Anastasia, Bergmann, Luisa, Besoiu, Mihaela Gabriela, Betev, Latchezar, Bhaduri, Partha Pratim, Bhasin, Anju, Bhat, Inayat Rasool, Bhat, Mohammad Asif, Bhattacharjee, Buddhadeb, Bianchi, Livio, Bianchi, Nicola, Bielcik, Jaroslav, Bielcikova, Jana
• Format: Journal Article
• Language: English
• Published: Springer 2022
• Subjects: Nuclear Experiment; Physics; quark: recombination; hadronization; experimental results; 5020 GeV-cms/nucleon; heavy ion: scattering; D0: production; quark gluon: plasma; ALICE; suppression; CERN LHC Coll; energy loss; fragmentation
• ISSN: 1126-6708; 1029-8479
• DOI: 10.1007/JHEP12(2022)126

The production of non-prompt ${\rm D}^{0}$ mesons from beauty-hadron decays was measured at midrapidity ($\left| y \right| < 0.5$) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{\rm NN}}=5.02~\mathrm{TeV}$ with the ALICE experiment at the LHC. Their nuclear modification factor ($R_{\rm AA}$), measured for the first time down to $p_{\rm T}=1~\mathrm{GeV}/c$ in the $0-10$% and $30-50$% centrality classes, indicates a significant suppression, up to a factor of about three, for $p_{\rm T} > 5~\mathrm{GeV}/c$ in the $0-10$% central Pb-Pb collisions. The data are described by models that include both collisional and radiative processes in the calculation of beauty-quark energy loss in the quark-gluon plasma, and quark recombination in addition to fragmentation as a hadronization mechanism. The ratio of the non-prompt to prompt ${\rm D}^{0}$-meson $R_{\rm AA}$ is larger than unity for $p_{\rm T} > 4~\mathrm{GeV}/c$ in the $0-10$% central Pb-Pb collisions, as predicted by models in which beauty quarks lose less energy than charm quarks in the quark-gluon plasma because of their larger mass.