Using the CELLO detector, we have measured cross sections for the process gammagamma --> pi+pi- in the mass range 0.75-1.9 GeV/c2. A partial wave fit to the data indicates the presence of a sizeable S-wave amplitude with signs of resonant behaviour. Values for the gammagamma width of the f2(1270) are given, showing the model-dependence of this quantity. At higher dipion masses, the model of Brodsky and Lepage 's found to give an order of magnitude description of the data.

An Experimental-study of the Process Gamma-gamma-]pi+pi- / H. J., Behrend; L., Criegee; J. H., Field; G., Franke; H., Jung; J., Meyer; J. H., Peters; O., Podobrin; V., Schroder; G. G., Winter; P. J., Bussey; A. J., Campbell; D., Hendry; S. J., Lumsdon; I. O., Skillicorn; J., Ahme; V., Blobel; M., Feindt; H., Fenner; J., Harjes; J. H., Kohne; H., Spitzer; T., Weihrich; W. D., Apel; J., Engler; G., Flugge; D. C., Fries; J., Fuster; K., Gamerdinger; P., Grossewiesmann; H., Kuster; H., Muller; K. H., Ranitzsch; H., Schneider; W., Deboer; G., Buschhorn; G., Grindhammer; B., Gunderson; C., Kiesling; R., Kotthaus; H., Kroha; D., Luers; H., Oberlack; P., Schacht; S., Scholz; W., Wiedenmann; M., Davier; J. F., Grivaz; J., Haissinski; V., Journe; F., Lediberder; J. J., Veillet; K., Blohm; R., George; M., Goldberg; O., Hamon; F., Kapusta; L., Poggioli; M., Rivoal; G., Dagostini; F., Ferrarotto; Iacovacci, Michele; G. H., B.; B., Stella; G., Cozzika; Y., Ducros; G., Alexander; A., Beck; G., Bella; J., Grunhaus; A., Klatchko; A., Levy; C., Milstene. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 56:(1992), pp. 381-390.

An Experimental-study of the Process Gamma-gamma-]pi+pi-

IACOVACCI, MICHELE;
1992

Abstract

Using the CELLO detector, we have measured cross sections for the process gammagamma --> pi+pi- in the mass range 0.75-1.9 GeV/c2. A partial wave fit to the data indicates the presence of a sizeable S-wave amplitude with signs of resonant behaviour. Values for the gammagamma width of the f2(1270) are given, showing the model-dependence of this quantity. At higher dipion masses, the model of Brodsky and Lepage 's found to give an order of magnitude description of the data.
1992
An Experimental-study of the Process Gamma-gamma-]pi+pi- / H. J., Behrend; L., Criegee; J. H., Field; G., Franke; H., Jung; J., Meyer; J. H., Peters; O., Podobrin; V., Schroder; G. G., Winter; P. J., Bussey; A. J., Campbell; D., Hendry; S. J., Lumsdon; I. O., Skillicorn; J., Ahme; V., Blobel; M., Feindt; H., Fenner; J., Harjes; J. H., Kohne; H., Spitzer; T., Weihrich; W. D., Apel; J., Engler; G., Flugge; D. C., Fries; J., Fuster; K., Gamerdinger; P., Grossewiesmann; H., Kuster; H., Muller; K. H., Ranitzsch; H., Schneider; W., Deboer; G., Buschhorn; G., Grindhammer; B., Gunderson; C., Kiesling; R., Kotthaus; H., Kroha; D., Luers; H., Oberlack; P., Schacht; S., Scholz; W., Wiedenmann; M., Davier; J. F., Grivaz; J., Haissinski; V., Journe; F., Lediberder; J. J., Veillet; K., Blohm; R., George; M., Goldberg; O., Hamon; F., Kapusta; L., Poggioli; M., Rivoal; G., Dagostini; F., Ferrarotto; Iacovacci, Michele; G. H., B.; B., Stella; G., Cozzika; Y., Ducros; G., Alexander; A., Beck; G., Bella; J., Grunhaus; A., Klatchko; A., Levy; C., Milstene. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 56:(1992), pp. 381-390.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11588/468722
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 65
  • ???jsp.display-item.citation.isi??? 76
social impact