Evidence for the decay X(3872) →ψ(2S)γ
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| Title: | Evidence for the decay X(3872) →ψ(2S)γ |
| Author: | LHCb Collaboration Adeva Andany, Bernardo Álvarez Cartelle, Paula Dosil Suárez, Álvaro Fernández Albor, Víctor Manuel Gallas Torreira, Abraham Antonio Hernando Morata, Jóse Ángel Pazos Álvarez, Antonio Pérez Trigo, Eliseo Plo Casasus, Máximo Rodríguez Pérez, Pablo Romero Vidal, Antonio Saborido Silva, Juan José Santamarina Ríos, Cibrán Seco Miguélez, Marcos Antonio Vázquez Regueiro, Pablo Vázquez Sierra, Carlos |
| Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
| Date of Issue: | 2014 |
| Publisher: | Elsevier |
| Citation: | Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., ... & Cartelle, P. A. (2014). Evidence for the decay X (3872)→ ψ (2S) γ. Nuclear Physics B, 886, 665-680 |
| Abstract: | Evidence for the decay mode X(3872) →ψ(2S)γin B+→X(3872)K+decays is found with a sig-nificance of 4.4 standard deviations. The analysis is based on adata sample of proton–proton collisions, corresponding to an integrated luminosity of3fb−1, collected with the LHCb detector, at centre-of-mass energies of 7and8TeV. The ratio of the branching fraction of the X(3872) →ψ(2S)γdecay to that of the X(3872) →J/ψγdecay is measured to be B(X(3872)→ψ(2S)γ) 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 apureD¯ D∗molecular interpretation of the X(3872)state. |
| Publisher version: | https://doi.org/10.1016/j.nuclphysb.2014.06.011 |
| URI: | http://hdl.handle.net/10347/21717 |
| DOI: | 10.1016/j.nuclphysb.2014.06.011 |
| ISSN: | 0550-3213 |
| E-ISSN: | 1873-1562 |
| Rights: | ©2014 CERN for the benefit of the LHCb Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3 |
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