Multiplicity dependence of $Υ$ production at forward rapidity in pp collisions at $\sqrt{s}$ = 13 TeV
S. Acharya, D. Adamová, Alexander Adler, Gianluca Aglieri Rinella, M. Agnello, N. Agrawal, Zubayer Ahammed, S. Ahmad, S. U. Ahn, I. Ahuja, A. Akindinov, Mohammad Al-Turany, Dmitry Aleksandrov, B. Alessandro, H. M. Alfanda, Jose Ruben Alfaro Molina, Bushra Ali, Yasir Ali, A. Alici, N. Alizadehvandchali, A. Alkin, J. Alme, G. Alocco, T. Alt, I. Altsybeev, Jesús Ricardo Alvarado García, M. N. Anaam, Cristian Andrei, Anton Andronic, V. Anguelov, F. Antinori, P. Antonioli, Anuj Chandra, N. Apadula, L. Aphecetche, Harald Appelshaeuser, C. Arata, Silvia Arcelli, M. Aresti, Roberta Arnaldi, I. C. Arsene, Mesut Arslandok, Andre Augustinus, Ralf Peter Averbeck, M. D. Azmi, A. Badalà, Y. W. Baek, Xiaozhi Bai, R. Bailhache, Y. Bailung, R. Bala, A. Balbino, A. Baldisseri, Bartosz Baliś, D. Banerjee, Z. Banoo, R. Barbera, F. Barile, L. Barioglio, Maria Barlou, G. G. Barnaföldi, L. S. Barnby, Valerie Ramillien Barret, Leonardo Barreto de Oliveira Campos, C. Bartels, K. Barth, Esther Bartsch, F. 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Espagnon, Giulio Eulisse, D. Evans, S. Evdokimov, L. Fabbietti, M. Faggin, Julien Faivre, Feng Fan, W. Fan, A. Fantoni, Markus Fasel, P. Fecchio, A. Feliciello, Г. Феофилов, A. Fernández Téllez, M. B. Ferrer, A. Ferrero, C. Ferrero, A. Ferretti, Victor Jose Gaston Feuillard, V. Filova, D. Finogeev, F. M. Fionda, F. Flor, Amanda Nicole Flores, Siegfried Valentin Foertsch, I. Fokin, S. Fokin, E. Fragiacomo, Eszter Frajna, Ulrich Fuchs, N. Funicello, Christophe Furget, Artur Furs, T. Fusayasu, Jens Joergen Gaardhoeje, M. Gagliardi, Alberto Martin Gago Medina, Carlos Duarte Galvan, Dhevan Raja Gangadharan, P. Ganoti, C. Garabatos, Tonatiuh García Chàvez, E. García-Solis, Kunal Garg, Corrado Gargiulo, Aydan Garibli, Katharina Demmich, P. Gasik, A. Gautam, Maria Beatriz de Leone Gay, M. Germain, Chandrasekhar Ghosh, Sanjay Kumar Ghosh, Marco Giacalone, P. Gianotti, P. Giubellino, P. Giubilato, Aude Marie Camille Glaenzer, P. Glässel, E. Glimos, Daniel Jia Qin Goh, V. 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Wilkinson, Guido Alexander Willems, Bernd Stefan Windelband, M. Winn, Josephina Rae Wright, Wenya Wu, Yitao Wu, R. Xu, A. Yadav, Arun Kumar Yadav, Serpil Yalcin Kuzu, Y. Yamaguchi, K. Yamakawa, Shiming Yang, S. Yano, Zhongbao Yin, I.-K. Yoo, Jin Hee Yoon, Shiming Yuan, Alperen Yuncu, V. Zaccolo, C. Zampolli, Henrique José Correia Zanoli, F. Zanone, N. Zardoshti, A. Zarochentsev, P. Závada, Nikolay Zavyalov, Mikhail Zhalov, Biao Zhang, S. Zhang, Xiaoming Zhang, Yifei Zhang, Z. Zhang, Mingrui Zhao, Vladimir Zherebchevskii, Zhi Yu, Natalia Zhigareva, Daicui Zhou, Y. Zhou, J. Zhu, Ya Zhu, G. M. Zinovjev, Stefan Cristi Zugravel, Nicola Zurlo, ALICE Collaboration
Rattachement africain : fr, de. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
The measurement of ϒ(1S), ϒ(2S), and ϒ(3S) yields as a function of the charged-particle multiplicity density, dNch/dη, using the ALICE experiment at the LHC, is reported in pp collisions at $\sqrt{s}$ = 13 TeV. The ϒ meson yields are measured at forward rapidity (2.5 < y<4) in the dimuon decay channel, whereas the charged-particle multiplicity is defined at central rapidity (|η|<1). Both quantities are divided by their average value in minimum bias events to compute the self-normalized quantities. The increase of the self-normalized ϒ(1S), ϒ(2S), and ϒ(3S) yields is found to be compatible with a linear scaling with the self-normalized dN$_{ch}$/dη, within the uncertainties. The self-normalized yield ratios of excited-to-ground ϒ states are compatible with unity within uncertainties. Similarly, the measured double ratio of the self-normalized ϒ(1S) to the self-normalized J/ψ yields, both measured at forward rapidity, is compatible with unity for self-normalized charged-particle multiplicities beyond one. The measurements are compared with theoretical predictions incorporating initial or final state effects.
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