Observation of structure in the J/[psi]-pair mass spectrum
Using proton-proton collision data at centre-of-mass energies of s=7,8 and 13TeV recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 9fb-1, the invariant mass spectrum of J/ψ pairs is studied. A narrow structure around 6.9GeV/c2 matching the lin...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
29 August 2020
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| In: |
Science bulletin
Year: 2020, Jahrgang: 65, Heft: 23, Pages: 1983-1993 |
| ISSN: | 2095-9281 |
| DOI: | 10.1016/j.scib.2020.08.032 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.scib.2020.08.032 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S2095927320305685 
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| Verfasserangaben: | LHCb collaboration: Roel Aaij, Flavio Archilli, Sebastian Bachmann, Daniel Berninghoff, Martino Borsato, MichalDziewiecki, Giulia Frau, David Gerick, Jascha Grabowski, Paul André Günther, Xiaoxue Han, Stephanie Hansmann-Menzemer, Jiangqiao Hu, Matthieu Kecke, Renata Kopecná, Blake Leverington, Peilian Li, Hanna Malygina, Jörg Marks, Nis Meinert, Sebastian Neubert, Alessio Piucci, Michael Schmelling, Mindaugas Sarpis, Nicola Skidmore, Simon Stemmle, Daniel Joachim Unverzagt, Harald Viemann, Ulrich Uwer, Roland Waldi, Chishuai Wang, Lukas Witola, Alexey Zhelezov und weitere 939 |
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| 245 | 1 | 0 | |a Observation of structure in the J/[psi]-pair mass spectrum |c LHCb collaboration: Roel Aaij, Flavio Archilli, Sebastian Bachmann, Daniel Berninghoff, Martino Borsato, MichalDziewiecki, Giulia Frau, David Gerick, Jascha Grabowski, Paul André Günther, Xiaoxue Han, Stephanie Hansmann-Menzemer, Jiangqiao Hu, Matthieu Kecke, Renata Kopecná, Blake Leverington, Peilian Li, Hanna Malygina, Jörg Marks, Nis Meinert, Sebastian Neubert, Alessio Piucci, Michael Schmelling, Mindaugas Sarpis, Nicola Skidmore, Simon Stemmle, Daniel Joachim Unverzagt, Harald Viemann, Ulrich Uwer, Roland Waldi, Chishuai Wang, Lukas Witola, Alexey Zhelezov und weitere 939 |
| 246 | 3 | 0 | |a ψ |
| 246 | 3 | 3 | |a Observation of structure in the J/ psi -pair mass spectrum |
| 264 | 1 | |c 29 August 2020 | |
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| 500 | |a Im Titel ist "psi" als griechischer Buchstabe dargestellt | ||
| 500 | |a Gesehen am 09.02.2021 | ||
| 520 | |a Using proton-proton collision data at centre-of-mass energies of s=7,8 and 13TeV recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 9fb-1, the invariant mass spectrum of J/ψ pairs is studied. A narrow structure around 6.9GeV/c2 matching the lineshape of a resonance and a broad structure just above twice the J/ψ mass are observed. The deviation of the data from nonresonant J/ψ-pair production is above five standard deviations in the mass region between 6.2 and 7.4GeV/c2, covering predicted masses of states composed of four charm quarks. The mass and natural width of the narrow X(6900) structure are measured assuming a Breit-Wigner lineshape. | ||
| 650 | 4 | |a Exotics | |
| 650 | 4 | |a Particle and resonance production | |
| 650 | 4 | |a QCD | |
| 650 | 4 | |a Quarkonium | |
| 650 | 4 | |a Spectroscopy | |
| 650 | 4 | |a Tetraquark | |
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