Evidence for the Decay X(3872) → ψ(2S)γ
Evidence for the decay mode X(3872) → ψ(2S)γ in B[superscript +] → X(3872)K[superscript +] decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding to an integrated luminosity of 3 fb[superscript −1], collected...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/1721.1/91177 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
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| author | Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J |
| author_sort | Counts, Ian Thomas Hunt |
| collection | MIT |
| description | Evidence for the decay mode X(3872) → ψ(2S)γ in B[superscript +] → X(3872)K[superscript +] decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding to an integrated luminosity of 3 fb[superscript −1], collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) →ψ (2S)γ decay to that of the X(3872) → J/ψγ decay is measured to be [B(X(3872) → ψ(2S)γ) over B(X(3872)→J/ψγ)] = 2.46 ± 0.64 ± 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D[bar over D]⁎ molecular interpretation of the X(3872) state. |
| first_indexed | 2024-09-23T10:36:35Z |
| format | Article |
| id | mit-1721.1/91177 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:36:35Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/911772023-02-26T04:22:26Z Evidence for the Decay X(3872) → ψ(2S)γ Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Counts, Ian Thomas Hunt Ilten, Philip James Williams, Michael Evidence for the decay mode X(3872) → ψ(2S)γ in B[superscript +] → X(3872)K[superscript +] decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding to an integrated luminosity of 3 fb[superscript −1], collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) →ψ (2S)γ decay to that of the X(3872) → J/ψγ decay is measured to be [B(X(3872) → ψ(2S)γ) over B(X(3872)→J/ψγ)] = 2.46 ± 0.64 ± 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D[bar over D]⁎ molecular interpretation of the X(3872) state. National Science Foundation (U.S.) 2014-10-27T14:27:59Z 2014-10-27T14:27:59Z 2014-06 2014-06 Article http://purl.org/eprint/type/JournalArticle 05503213 http://hdl.handle.net/1721.1/91177 Aaij, R., et al. “Evidence for the Decay X(3872) → ψ(2S)γ.” Nuclear Physics B 886 (September 2014): 665–680. © 2014 CERN for the benefit of the LHCb Collaboration https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 en_US http://dx.doi.org/10.1016/j.nuclphysb.2014.06.011 Nuclear Physics B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J Evidence for the Decay X(3872) → ψ(2S)γ |
| title | Evidence for the Decay X(3872) → ψ(2S)γ |
| title_full | Evidence for the Decay X(3872) → ψ(2S)γ |
| title_fullStr | Evidence for the Decay X(3872) → ψ(2S)γ |
| title_full_unstemmed | Evidence for the Decay X(3872) → ψ(2S)γ |
| title_short | Evidence for the Decay X(3872) → ψ(2S)γ |
| title_sort | evidence for the decay x 3872 ψ 2s γ |
| url | http://hdl.handle.net/1721.1/91177 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
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