An analysis of new data for the reaction p6p!p6p1n at incident energies between 223 and 284 MeV is presented. p1p2 cross sections are obtained via Goebel-Chew-Low techniques by extrapolation to the pion pole using the pseudoperipheral approximation. A consistency check between the present experimental results and previous experiments at higher energies is made using Roy equations. The isospin 0, S-wave pp scattering length was obtained using a variety of methods. The result obtained from a threshold expansion is a0 0 50.20460.014 ~statistical! 60.008 ~systematic! in inverse pion mass units. It is shown that there are significant differences between the reaction mechanisms for the (p2p1) and (p1p1) channels.
pi pi --> pi pi cross-sections near threshold / M., Kermani; P. A., Amaudruz; Bonutti, Faustino; J. T., Brack; Camerini, Paolo; L., Felawka; Fragiacomo, Enrico; E. F., Gibson; N., Grion; G. J., Hofman; R. R., Johnson; E. L., Mathie; S., Mcfarland; R., Meier; D., Ottewell; K. J., Raywood; Rui, Rinaldo; M. E., Sevior; G. R., Smith; R., Tacik. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - STAMPA. - 58:(1998), pp. 3431-3441. [10.1103/PhysRevC.58.3431]
pi pi --> pi pi cross-sections near threshold
BONUTTI, FAUSTINO;CAMERINI, Paolo;FRAGIACOMO, ENRICO;RUI, RINALDO;
1998-01-01
Abstract
An analysis of new data for the reaction p6p!p6p1n at incident energies between 223 and 284 MeV is presented. p1p2 cross sections are obtained via Goebel-Chew-Low techniques by extrapolation to the pion pole using the pseudoperipheral approximation. A consistency check between the present experimental results and previous experiments at higher energies is made using Roy equations. The isospin 0, S-wave pp scattering length was obtained using a variety of methods. The result obtained from a threshold expansion is a0 0 50.20460.014 ~statistical! 60.008 ~systematic! in inverse pion mass units. It is shown that there are significant differences between the reaction mechanisms for the (p2p1) and (p1p1) channels.Pubblicazioni consigliate
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