Based on e+e- annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center-of-mass energies from 4.008 to 4.600 GeV, measurements of the Born cross section of e+e- --> ppbar pi0 are performed. No significant resonant structure is observed in the measured energy dependence of the cross section. The upper limit on the Born cross section of e+e- --> Y(4260) --> ppbar pi0 at the 90% C.L. is determined to be 0.01 pb. The upper limit on the ratio of the branching fractions B(Y(4260) --> ppbar pi0 )/ B(Y(4260) --> pi+pi-Jpsi) at the 90% C.L. is determined to be 0.02%.
Measurements of cross section of e+e- --> ppbar pi0 at center-of-mass energies between 4.008 and 4.600 GeV
FARINELLI, Riccardo;GARZIA, Isabella;MEZZADRI, Giulio;
2017
Abstract
Based on e+e- annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center-of-mass energies from 4.008 to 4.600 GeV, measurements of the Born cross section of e+e- --> ppbar pi0 are performed. No significant resonant structure is observed in the measured energy dependence of the cross section. The upper limit on the Born cross section of e+e- --> Y(4260) --> ppbar pi0 at the 90% C.L. is determined to be 0.01 pb. The upper limit on the ratio of the branching fractions B(Y(4260) --> ppbar pi0 )/ B(Y(4260) --> pi+pi-Jpsi) at the 90% C.L. is determined to be 0.02%.File in questo prodotto:
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