ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract We study the shape of the invariant mass spectra of several resonances produced atP T≧2.0 GeV/c and observed through two-particle final states, namely thef 2(1270),K *(892), $$\bar K*(892)$$ ,K *(1430), and $$\bar K*(1430)$$ mesons. The data sample comes from π− Be interactions atP lab=150 GeV/c and 300 GeV/c which have been collected using the OMEGA spectrometer at CERN. We find that although these meson resonances have their masses and widths consistent with the corresponding world average values, their shapes are all subject to the same kind of distortion: their low-mass tail is enhanced while their high-mass tail is sharply cut. This observation indicates that meson resonances produced in the fragmentation of quarks and gluons are distorted by the same damping factor in a way which preserves their masses and lifetimes.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01413176
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