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., Gräter; R., Bilger; H., Clement; R., Meier; G. J., Wagner; E., Friedman; M., Schepkin; P. A., Amaudruz; L., Felawka; D., Ottewell; G. R., Smith; A., Ambardar; G. J., Hofman; M., Kermani; G., Tagliente; Bonutti, Faustino; Camerini, Paolo; N., Grion; Rui, Rinaldo; P., Hong; E. L., Mathie; R., Tacik; J., Clark; M. E., Sevior; O., Patarakin. - 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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2558787
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 26
social impact