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http://bura.brunel.ac.uk/handle/2438/24401
Title: | Evidence for X(3872) in Pb-Pb Collisions and Studies of its Prompt Production at sNN = 5.02 TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Bergauer, T Dragicevic, M Erö, J Escalante Del Valle, A Flechl, M Frühwirth, R Jeitler, M Lowette, S Marchesini, I Moortgat, S Python, Q Tavernier, S Van Doninck, W Van Mulders, P Beghin, D Bilin, B Clerbaux, B De Lentdecker, G Delannoy, H Dorney, B Favart, L Grebenyuk, A Kalsi, AK Moureaux, L Popov, A Postiau, N Starling, E Thomas, L Vander Velde, C Vanlaer, P Vannerom, D Cornelis, T Dobur, D Khvastunov, I Niedziela, M Roskas, C Skovpen, K Tytgat, M Verbeke, W Vermassen, B Vit, M Bruno, G Caputo, C David, P Delaere, C Delcourt, M Giammanco, A Lemaitre, V Prisciandaro, J Saggio, A Vischia, P Zobec, J Alves, GA Correia Silva, G Hensel, C Moraes, A Belchior Batista Das Chagas, E Carvalho, W Chinellato, J Coelho, E Da Costa, EM Da Silveira, GG De Jesus Damiao, D Cole, JE Hobson, PR Khan, A Kyberd, P Mackay, CK Reid, ID Teodorescu, L Zahid, S Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Rad, N Schieck, J Schöfbeck, R Spanring, M Waltenberger, W Wulz, CE Zarucki, M Drugakov, V Mossolov, V Suarez Gonzalez, J Darwish, MR De Wolf, EA Di Croce, D Janssen, X Kello, T Lelek, A Pieters, M Rejeb Sfar, H Van Haevermaet, H Van Mechelen, P Van Putte, S Van Remortel, N Blekman, F Bols, ES Chhibra, SS D'Hondt, J De Clercq, J Lontkovskyi, D |
Issue Date: | 19-Jan-2022 |
Publisher: | American Physical Society |
Citation: | CMS Collaboration, Sirunyan, A.M. et al. (2022) 'Evidence for X(3872) in Pb-Pb Collisions and Studies of its Prompt Production at sNN = 5.02 TeV', Physical Review Letters, 128 (3), 032001, pp. 1-18. doi: 10.1103/PhysRevLett.128.032001. |
Abstract: | Copyright © 2022 CERN, for the CMS Collaboration. The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (Pb-Pb) collisions at a center-of-mass energy of sNN=5.02 TeV per nucleon pair, using the decay chain X(3872)→J/ψπ+π-→μ+μ-π+π-. The data were recorded with the CMS detector in 2018 and correspond to an integrated luminosity of 1.7 nb-1. The measurement is performed in the rapidity and transverse momentum ranges |y|<1.6 and 15<pT<50 GeV/c. The significance of the inclusive X(3872) signal is 4.2 standard deviations. The prompt X(3872) to ψ2S yield ratio is found to be ρPb-Pb=1.08±0.49(stat)±0.52(syst), to be compared with typical values of 0.1 for pp collisions. This result provides a unique experimental input to theoretical models of the X(3872) production mechanism, and of the nature of this exotic state. |
URI: | https://bura.brunel.ac.uk/handle/2438/24401 |
DOI: | https://doi.org/10.1103/PhysRevLett.128.032001 |
ISSN: | 0031-9007 |
Other Identifiers: | 032001 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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