Probing the nature of the χc1(3872) state using radiative decays
The radiative decays chi(c1)(3872) -> (2S) gamma and chi(c1)(3872) -> J/gamma are used to probe the nature of the chi(c1)(3872) state using proton-proton collision data collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb(-1). Using the B+ -> chi(c1)(3872)K+ d...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
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21 November 2024
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| In: |
Journal of high energy physics
Year: 2024, Heft: 11, Pages: 1-31 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP11(2024)121 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP11(2024)121 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP11(2024)121#citeas 
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| Verfasserangaben: | R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, P. Herrero Gascon, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, M. Schmelling, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und weitere 1093 Autoren] |
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| 245 | 1 | 0 | |a Probing the nature of the χc1(3872) state using radiative decays |c R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, P. Herrero Gascon, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, M. Schmelling, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und weitere 1093 Autoren] |
| 246 | 3 | 3 | |a Probing the nature of the χ c 1 (3872) state using radiative decays |
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| 520 | |a The radiative decays chi(c1)(3872) -> (2S) gamma and chi(c1)(3872) -> J/gamma are used to probe the nature of the chi(c1)(3872) state using proton-proton collision data collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb(-1). Using the B+ -> chi(c1)(3872)K+ decay, the chi(c1)(3872) -> psi(2S) gamma process is observed for the first time and the ratio of its partial width to that of the chi(c1)(3872) -> J/psi gamma decay is measured to be Gamma(chi c1(3872))->psi(2S)gamma/Gamma(chi c1(3872)) -> J/psi gamma = 1.67 +/- 0.21 +/- 0.12 +/- 0.04, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainties on the branching fractions of the psi(2S) and J/psi mesons. The measured ratio makes the interpretation of the chi(c1)(3872) state as a pure D-0(D) over bar (*0) + (D) over bar D-0(*0) molecule questionable and strongly indicates a sizeable compact charmonium or tetraquark component within the chi(c1)(3872) state. | ||
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