Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS
The first evidence for X(3872) production in relativistic heavy ion collisions, with a significance of 4.2 standard deviations, is reported. The X(3872) production is studied in lead-lead (PbPb) collisions at a center-of-mass energy of √SNN = 5.02 TeV$\sqrt {{S_{{\rm{NN}}}}} = 5.02\,{\rm{TeV}}$SNN=5...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2022/03/epjconf_sqm2021_12007.pdf |
| _version_ | 1818903190507094016 |
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| author | Lee Yen-Jie |
| author_facet | Lee Yen-Jie |
| author_sort | Lee Yen-Jie |
| collection | DOAJ |
| description | The first evidence for X(3872) production in relativistic heavy ion collisions, with a significance of 4.2 standard deviations, is reported. The X(3872) production is studied in lead-lead (PbPb) collisions at a center-of-mass energy of √SNN = 5.02 TeV$\sqrt {{S_{{\rm{NN}}}}} = 5.02\,{\rm{TeV}}$SNN=5.02 TeV per nucleon pair with the CMS detector. The measurement is performed in the rapidity and transverse momentum ranges |y| < 1.6 and 15 < pT < 50 GeV/c. The prompt X(3872) to ψ(2S) yield ratio is found to be ρPbPb = 1.08 ± 0.49(stat.) ± 0.52(syst.), to be compared with typical values of 0.1 for pp collisions. This provides new input to theoretical models of the X(3872) production mechanism, and of the nature of this exotic state. |
| first_indexed | 2024-12-19T20:47:36Z |
| format | Article |
| id | doaj.art-09365a423628478eb7bb29aff3c24f08 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-19T20:47:36Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-09365a423628478eb7bb29aff3c24f082022-12-21T20:06:11ZengEDP SciencesEPJ Web of Conferences2100-014X2022-01-012591200710.1051/epjconf/202225912007epjconf_sqm2021_12007Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMSLee Yen-Jie0Massachusetts Institute of TechnologyThe first evidence for X(3872) production in relativistic heavy ion collisions, with a significance of 4.2 standard deviations, is reported. The X(3872) production is studied in lead-lead (PbPb) collisions at a center-of-mass energy of √SNN = 5.02 TeV$\sqrt {{S_{{\rm{NN}}}}} = 5.02\,{\rm{TeV}}$SNN=5.02 TeV per nucleon pair with the CMS detector. The measurement is performed in the rapidity and transverse momentum ranges |y| < 1.6 and 15 < pT < 50 GeV/c. The prompt X(3872) to ψ(2S) yield ratio is found to be ρPbPb = 1.08 ± 0.49(stat.) ± 0.52(syst.), to be compared with typical values of 0.1 for pp collisions. This provides new input to theoretical models of the X(3872) production mechanism, and of the nature of this exotic state.https://www.epj-conferences.org/articles/epjconf/pdf/2022/03/epjconf_sqm2021_12007.pdf |
| spellingShingle | Lee Yen-Jie Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS EPJ Web of Conferences |
| title | Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS |
| title_full | Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS |
| title_fullStr | Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS |
| title_full_unstemmed | Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS |
| title_short | Evidence for X(3872) in PbPb collisions and studies of its prompt production at √SNN = 5.02 TeV with CMS |
| title_sort | evidence for x 3872 in pbpb collisions and studies of its prompt production at √snn 5 02 tev with cms |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2022/03/epjconf_sqm2021_12007.pdf |
| work_keys_str_mv | AT leeyenjie evidenceforx3872inpbpbcollisionsandstudiesofitspromptproductionatsnn502tevwithcms |