Search for beautiful tetraquarks in the [upsilon](1S)[mu]+[mu]− invariant-mass spectrum
The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b¯¯b¯ \overline{b} quarks, Xbb¯bb¯Xbb¯bb¯ {X}_{b\overline{b}b\overline{b}} . The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
October 12, 2018
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| In: |
Journal of high energy physics
Year: 2018, Heft: 10 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP10(2018)086 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1007/JHEP10(2018)086 |
| Verfasserangaben: | the LHCb collaboration |
| Zusammenfassung: | The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b¯¯b¯ \overline{b} quarks, Xbb¯bb¯Xbb¯bb¯ {X}_{b\overline{b}b\overline{b}} . The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies s√=7s=7 \sqrt{s}=7 , 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb−1. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the Xbb¯bb¯Xbb¯bb¯ {X}_{b\overline{b}b\overline{b}} state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range [2.0, 5.0], and the Xbb¯bb¯Xbb¯bb¯ {X}_{b\overline{b}b\overline{b}} state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c. Open image in new window |
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| Beschreibung: | Im Titel sind "+" und "+" hochgestellt Im Titel werden Ypsilon und mu als griechische Buchstaben dargestellt The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, F. Dordei, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, R. Kopecna, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere] Gesehen am 17.04.2019 |
| Beschreibung: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP10(2018)086 |