Evidence for an [eta] c(1S) π - resonance in B0→[eta] c(1S)K+ π - decays
A Dalitz plot analysis of B0→ηc(1S)K+π−B0→ηc(1S)K+π−{{B} ^0} \!\rightarrow \eta _c(1S) {{K} ^+} {{\pi } ^-} decays is performed using data samples of pp collisions collected with the LHCb LHCb \text{ LHCb } detector at centre-of-mass energies of s√=7, 8s=7, 8{\sqrt{s}} =7,~8 and 13TeV13TeV13{\,\math...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 December 2018
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| In: |
The European physical journal. C, Particles and fields
Year: 2018, Jahrgang: 78, Heft: 12 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-018-6447-z |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-018-6447-z Verlag, Volltext: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-6447-z.pdf 
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| Verfasserangaben: | LHCb Collaboration* |
MARC
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| 245 | 1 | 0 | |a Evidence for an [eta] c(1S) π - resonance in B0→[eta] c(1S)K+ π - decays |c LHCb Collaboration* |
| 246 | 3 | 0 | |a η |
| 246 | 3 | 3 | |a Evidence for an eta c (1S)pi minus resonance in B 0 → eta c (1S) K plus pi minus decays |
| 264 | 1 | |c 17 December 2018 | |
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| 500 | |a Im Titel sind "+", "-" und "0" hochgestellt, "c" ist tiefgestellt | ||
| 500 | |a Im Titel ist "eta" als griechischer Buchstabe dargestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, R. Kopecna, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, A. Piucci, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere] | ||
| 500 | |a Gesehen am 12.06.2019 | ||
| 520 | |a A Dalitz plot analysis of B0→ηc(1S)K+π−B0→ηc(1S)K+π−{{B} ^0} \!\rightarrow \eta _c(1S) {{K} ^+} {{\pi } ^-} decays is performed using data samples of pp collisions collected with the LHCb LHCb \text{ LHCb } detector at centre-of-mass energies of s√=7, 8s=7, 8{\sqrt{s}} =7,~8 and 13TeV13TeV13{\,\mathrm {Te}\mathrm {V}} , corresponding to a total integrated luminosity of 4.7 fb −14.7 fb −14.7 \,\text{ fb }^{-1} . A satisfactory description of the data is obtained when including a contribution representing an exotic ηc(1S)π−ηc(1S)π−\eta _c(1S) \pi ^- resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096±20 +18−22MeV4096±20 −22+18MeV4096 \pm 20~^{+18}_{-22} \,\mathrm {Me}\mathrm {V} and 152±58 +60−35MeV152±58 −35+60MeV152 \pm 58~^{+60}_{-35} \,\mathrm {Me}\mathrm {V} , respectively. The spin-parity assignments JP=0+JP=0+J^P=0^+ and JP=1−JP=1−J^{P}=1^- are both consistent with the data. In addition, the first measurement of the B0→ηc(1S)K+π−B0→ηc(1S)K+π−{{B} ^0} \!\rightarrow \eta _c(1S) {{K} ^+} {{\pi } ^-} branching fraction is performed and gives B(B0→ηc(1S)K+π−)=(5.73±0.24±0.13±0.66)×10−4,B(B0→ηc(1S)K+π−)=(5.73±0.24±0.13±0.66)×10−4,\begin{aligned} \displaystyle \mathcal {B}({{B} ^0} \!\rightarrow \eta _c(1S) {{K} ^+} {{\pi } ^-} ) = (5.73 \pm 0.24 \pm 0.13 \pm 0.66) \times 10^{-4}, \end{aligned}where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions. | ||
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