The total cross section of the 4He(π+,π-) reaction was measured for π+ kinetic energies ranging from 70 to 130 MeV using the CHAOS spectrometer at TRIUMF and a liquid 4He target. Around Tπ=90MeV, total cross sections exceed conventional model predictions by a factor of 3, whereas at Tπ=70MeV and for Tπ>130MeV the data are consistent with these calculations. An attempt is made to understand this behavior by assuming the production of the hypothetical d′ dibaryon.

Energy dependence of the He-4(pi+,pi-) total cross-section / J., G., R., B., H., C., R., M., G. J., W., E., F., M., S., P. A., A., L., F., D., O., G. R., S., A., A., G. J., H., M., K., G., T., Bonutti, F., Camerini, P., N., G., Rui, R., P., H., et al.. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - STAMPA. - 58:(1998), pp. 1576-1586. [10.1103/PhysRevC.58.1576]

Energy dependence of the He-4(pi+,pi-) total cross-section

BONUTTI, FAUSTINO;CAMERINI, Paolo;RUI, RINALDO;
1998-01-01

Abstract

The total cross section of the 4He(π+,π-) reaction was measured for π+ kinetic energies ranging from 70 to 130 MeV using the CHAOS spectrometer at TRIUMF and a liquid 4He target. Around Tπ=90MeV, total cross sections exceed conventional model predictions by a factor of 3, whereas at Tπ=70MeV and for Tπ>130MeV the data are consistent with these calculations. An attempt is made to understand this behavior by assuming the production of the hypothetical d′ dibaryon.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2558787
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