Search for the decay J/psi -> gamma plus invisible
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Erişim
info:eu-repo/semantics/openAccessAttribution-NoDerivs 3.0 United Stateshttp://creativecommons.org/licenses/by-nd/3.0/us/Tarih
2020Üst veri
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Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Amoroso, A., . . . Collaboration, B. (2020). Search for the decay J/psi -> gamma plus invisible. Physical Review D, 101(11), 9. doi:10.1103/PhysRevD.101.112005Özet
We search for J/psi radiative decays into a weakly interacting neutral particle, namely an invisible particle, using the J/psi produced through the process psi(3686) -> pi(+)pi(-) J/psi in a data sample of (448.1 +/- 2.9) x 10(6) psi(3686) decays collected by the BESIII detector at BEPCII. No significant signal is observed. Using a modified frequentist method, upper limits on the branching fractions are set under different assumptions of invisible particle masses up to 12 GeV/c(2). The upper limit corresponding to an invisible particle with zero mass is 7.0 x 10(-7) at the 90% confidence level.
Kaynak
Physical Review D.Cilt
101Sayı
11Koleksiyonlar
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