Search for new hadronic decays of h(c) and observation of h(c) -> p(p)over-bar eta
Künye
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Cetin, S. A., Kolcu, O. B. (2022). Search for new hadronic decays of h(c) and observation of h(c) -> p(p)over-bar eta. Journal of High Energy Physics, (5).Özet
A search for the hadronic decays of the h(c) meson to the final states p (p) over bar pi(+)pi(-)pi(0), p (p) over bar eta and p (p) over bar pi(0) via the process psi(3686) -> pi(0)(h)c is performed using (4.48 +/- 0.03) x 10(8) psi(3686) events collected with the BESIII detector. The decay channel h(c) -> p (p) over bar eta is observed for the first time with a significance greater than 5 sigma and a branching fraction of (6.41 +/- 1.74 +/- 0.53 +/- 1.00) x 10(-4), where the uncertainties are statistical, systematic, and that from the branching fraction of psi(3686) -> pi(0)(h)c. Strong evidence for the decay h(c) p (p) over bar pi(+)pi(-)pi(0) is found with a significance of 4.9 sigma and a branching fraction of (3.84 +/- 0.83 +/- 0.69 +/- 0.58) x 10(-3). The significances include systematic uncertainties. No clear signal of the decay h(c) -> p (p) over bar pi(0) is found, and an upper limit of 6.59 x 10(-4) on its branching fraction is set at the 90% confidence level.
