The p̅ p→KSKS→4π± cross section was measured at incident antiproton momenta between 0.6 and 1.9 GeV/c using the CERN Low Energy Antiproton Ring. This investigation was part of a systematic study of in-flight antiproton-proton annihilations into two-neutral-meson final states in a search for hadronic resonances. A coarse scan of the p̅ p→KSKS cross section as a function of center-of-mass energy between 1.964 and 2.395 GeV/c2 and a fine scan of the region surrounding the ξ(2220) are presented. Upper limits on the product branching ratio B(ξ→p̅ p)×B(ξ→KSKS) are determined for a wide range of mass and width assumptions based on the nonobservation of the ξ(2220). A rise in the p̅ p→KSKS cross section is observed near 2.15 GeV/c2, which is consistent with the f2(2150) resonance.
Measurement of the p̅p→KSKS reaction from 0.6 to 1.9 GeV/c
LO VETERE, MAURIZIO;MARINELLI, MAURO;ROBUTTI, ENRICO;SANTRONI, ALBERTO;
1997-01-01
Abstract
The p̅ p→KSKS→4π± cross section was measured at incident antiproton momenta between 0.6 and 1.9 GeV/c using the CERN Low Energy Antiproton Ring. This investigation was part of a systematic study of in-flight antiproton-proton annihilations into two-neutral-meson final states in a search for hadronic resonances. A coarse scan of the p̅ p→KSKS cross section as a function of center-of-mass energy between 1.964 and 2.395 GeV/c2 and a fine scan of the region surrounding the ξ(2220) are presented. Upper limits on the product branching ratio B(ξ→p̅ p)×B(ξ→KSKS) are determined for a wide range of mass and width assumptions based on the nonobservation of the ξ(2220). A rise in the p̅ p→KSKS cross section is observed near 2.15 GeV/c2, which is consistent with the f2(2150) resonance.
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