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Amato, S.; Andreotti, M.; Atzeni, M.; Ben-Haim, E.; Betancourt, C.; Blake, T.; Bobulska, D.; Butkevich, A.; Butter, J. S.; Campoverde Quezada, A. F.; Capriotti, L.; Cardini, A.; Caspary, R.; Chahrour, I.; Chen, S.; Cobbledick, J. L.; Congedo, L.; Couturier, B.; Davies, J. E.; Del Buono, L.; Didenko, S.; Durante, P.; Dziurda, A.; Egede, U.; Ely, S.; Epple, E.; Esen, S.; Falcao, L. N.; Fernez, A. D.; Franco Lima, V.; Gallas Torreira, A.; Gan, Y.; Gao, Y.; Garrido, L.; Gaspar, C.; Geertsema, R. E.; Giugliano, C.; Gkougkousis, E. L.; Grieser, N. A.; Inglessi, A.; Karpenkov, D.; Ketel, T.; Khreich, G.; Kmiec, M. R.; Kopciewicz, P.; Koppenburg, P.; Kravchenko, P.; Kretzschmar, S.; Kucewicz, W.; Lacarrere, D.; Landesa Gomez, C.; Lazzari, F.; Leflat, A.; Lucio Martinez, M.; Ma, R.; Maisuzenko, D.; Malecki, B.; McNab, A.; Merk, M.; Meyer Garcia, L.; Milanes, D. A.; Miralles, T.; Mitreska, B.; Mitzel, D. S.; Murta, R.; Palano, A.; Pepe Altarelli, M.; Pinci, D.; Polukhina, N.; Qian, W.; Quagliani, R.; Robbe, P.; Rudolph, M. S.; Ruiz Fernandez, R. A.; Satriano, C.; Schubiger, M.; Sellam, S.; Shevchenko, V.; Shi, B.; Slater, M. W.; Smith, K.; Snoch, A.; Solovev, A.; Souza De Almeida, F. L.; Sriskaran, V.; Steinkamp, O.; Strekalina, D.; Tan, Y.; Thomson, K. A.; Valenti, G.; Vázquez Sierra, C.; Vorobyev, A.; Vorobyev, V.; Voropaev, N.; Wilkinson, G.; Williams, M. R. J.; Xu, Z.; Zhang, D.; Zou, Q.; Zucchelli, S.
The journal of high energy physics, 07/2023, Letnik: 2023, Številka: 7Journal Article
A bstract The production cross-sections of Υ mesons, namely Υ(1 S ), Υ(2 S ) and Υ(3 S ), in pp collisions at $$ \sqrt{s} $$ s = 5 TeV are measured with a data sample corresponding to an integrated luminosity of 9 . 13 ± 0 . 18 pb − 1 collected by the LHCb detector. The Υ mesons are reconstructed in the decay mode Υ → μ + μ − . Double differential cross-sections times branching fractions, as functions of the transverse momentum p T and the rapidity y of the Υ mesons, are measured in the range p T < 20 GeV/ c and 2 . 0 < y < 4 . 5. The results integrated over these p T and y ranges are $$ \sigma \left(\textrm{Y}(1S)\right)\times \mathcal{B}\left(\textrm{Y}(1S)\to {\mu}^{+}{\mu}^{-}\right)=2101\pm 33\pm 83\ \textrm{pb}, $$$ \sigma \left(\textrm{Y}(2S)\right)\times \mathcal{B}\left(\textrm{Y}(2S)\to {\mu}^{+}{\mu}^{-}\right)=526\pm 20\pm 21\ \textrm{pb}, $$$ \sigma \left(\textrm{Y}(3S)\right)\times \mathcal{B}\left(\textrm{Y}(3S)\to {\mu}^{+}{\mu}^{-}\right)=242\pm 16\pm 10\ \textrm{pb}, $$ σ Υ 1 S × B Υ 1 S → μ + μ − = 2101 ± 33 ± 83 pb , σ Υ 2 S × B Υ 2 S → μ + μ − = 526 ± 20 ± 21 pb , σ Υ 3 S × B Υ 3 S → μ + μ − = 242 ± 16 ± 10 pb , where the first uncertainties are statistical and the second are systematic. The ratios of cross-sections between measurements of two different Υ states and between measurements at different centre-of-mass energies are determined. The nuclear modification factor of Υ(1 S ) at $$ \sqrt{s} $$ s = 5 TeV is updated as well using the directly measured cross-section results from this analysis.
