Proton-Antiproton Annihilation in Baryonium
| dc.creator | Ding, Gui-Jun | |
| dc.creator | Yan, Mu-Lin | |
| dc.date | 2005-02-14 | |
| dc.date | 2005-06-11 | |
| dc.date.accessioned | 2026-07-07T10:29:25Z | |
| dc.date.available | 2026-07-07T10:29:25Z | |
| dc.description | A possible interpretation of the near-threshold enhancement in the $(p\bar{p})$-mass spectrum in $J/ψ{\to}γp{\bar p}$ is the of existence of a narrow baryonium resonance X(1860). Mesonic decays of the $(p\bar{p})$-bound state X(1860) due to the nucleon-antinucleon annihilation are investigated in this paper. Mesonic coherent states with fixed $G$-parity and $P$-parity have been constructed . The Amado-Cannata-Dedoder-Locher-Shao formulation(Phys Rev Lett. {\bf 72}, 970 (1994)) is extended to the decays of the X(1860). By this method, the branch-fraction ratios of $Br(X\to η4π)$, $Br(X\to η2π)$ and $Br(X\to 3η)$ are calculated. It is shown that if the X(1860) is a bound state of $(p\bar{p})$, the decay channel ($X\to η4π)$ is favored over $(X\to η2π)$. In this way, we develop criteria for distinguishing the baryonium interpretation for the near-threshold enhancement effects in $(p\bar{p})$-mass spectrum in $J/ψ{\to}γp{\bar p}$ from other possibilities. Experimental checks are expected. An intuitive picture for our results is discussed. | |
| dc.description | 19 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0502127 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0502127 | |
| dc.identifier | Phys.Rev.C72:015208,2005 | |
| dc.identifier | doi:10.1103/PhysRevC.72.015208 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177795 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Proton-Antiproton Annihilation in Baryonium | |
| dc.type | text |