Search for Baryonic Decays of \psi(3770) and \psi(4040)
BESIII Collaboration: M. Ablikim, M. N. Achasov, O. Albayrak, D. J., Ambrose, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, J. Becker,, J. V. Bennett, M. Bertani, J. M. Bian, E. Boger, O. Bondarenko, I. Boyko, R., A. Briere, V. Bytev, H. Cai, X. Cai, O. akir
TL;DR
This study searches for baryonic decays of 7730 and 4040 charmonium states using data from BESIII, finding no evidence but setting upper limits on such decay modes.
Contribution
First comprehensive search for baryonic decays of 7730 and 4040 with BESIII data, establishing upper limits on their branching fractions.
Findings
No baryonic decay signals observed.
Upper limits set at 90% confidence level.
Results constrain theoretical models of charmonium decays.
Abstract
By analyzing data samples of 2.9 fb^{-1} collected at \sqrt s=3.773 GeV, 482 pb^{-1} collected at \sqrt s=4.009 GeV and 67 pb^{-1} collected at \sqrt s=3.542, 3.554, 3.561, 3.600 and 3.650 GeV with the BESIII detector at the BEPCII storage ring, we search for \psi(3770) and \psi(4040) decay to baryonic final states, including \Lambda\bar\Lambda\pi^+\pi^-, \Lambda \bar\Lambda\pi^0, \Lambda\bar\Lambda\eta, \Sigma^+ \bar\Sigma^-, \Sigma^0 \bar\Sigma^0, \Xi^-\bar\Xi^+ and \Xi^0\bar\Xi^0 decays. None are observed, and upper limits are set at the 90% confidence level.
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