Faculty and Student Publications
Document Type
Article
Publication Date
3-23-2021
Abstract
We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.
Relational Format
journal article
Recommended Citation
Teramoto, Y., Uehara, S., Masuda, M., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Behera, P., Beleño, C., Bennett, J., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., Bonvicini, G., … Belle Collaboration. (2021). Evidence for x (3872) → j / ψ π + π − produced in single-tag two-photon interactions. Physical Review Letters, 126(12), 122001. https://doi.org/10.1103/PhysRevLett.126.122001
DOI
10.1103/PhysRevLett.126.122001
Accessibility Status
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