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Brazilian Journal of Physics

versión impresa ISSN 0103-9733

Resumen

BEDIAGA, Ignacio. Scalar meson s phase motion at D+® p- p+p+ decay. Braz. J. Phys. [online]. 2004, vol.34, n.4a, pp. 1398-1405. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332004000700017.

We make a direct and model-independent measurement of the low p+ p- mass phase motion in the D+ ® p-p+p+ decay. Our preliminary results show a strong phase variation, compatible with the isoscalar s(500) meson. This result confirms our previous result [1] where we found evidence for the existence of this scalar particle using full Dalitz-plot analysis. We apply the Amplitude Difference (AD) method [2] to the same Fermilab E791 data sample used in the preceding analysis. We also give an example of how we extract the phase motion of the scalar amplitude, looking at the f0(980) in Ds+ ® p-p+p+ decay.

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