1. Shape distortions of meson resonances produced in hadron interactions atP T≧2 GeV/c
- Author
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V. Lenti, R. Zitoun, M.F. Votruba, E. Quercigh, A. Bellogianni, M. Stassinaki, B. R. French, A. Malamant, B. Ghidini, M. T. Trainor, M. Sené, A. Kirk, I. J. Bloodworth, F. Navach, D. Elia, Ph. Leruste, G. Vassiliadis, J. Kahane, R. A. Fini, K. Knudson, J. N. Carney, J. L. Narjoux, Vito Manzari, M. Benayoun, I. Vichou, A. Jacholkowski, D. DiBari, J.B. Kinson, A. Volte, R. Sené, K. Šařík, O. Villalobos Baillie, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lantz, Simone
- Subjects
Physics ,Particle physics ,Large Hadron Collider ,Physics and Astronomy (miscellaneous) ,Meson ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Hadron ,01 natural sciences ,Omega ,Spectral line ,[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,Nuclear physics ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,0103 physical sciences ,Quark–gluon plasma ,Damping factor ,High Energy Physics::Experiment ,Invariant mass ,Nuclear Experiment ,010306 general physics ,Engineering (miscellaneous) ,Particle Physics - Experiment - Abstract
We study the shape of the invariant mass spectra of several resonances produced atPT≧2.0 GeV/c and observed through two-particle final states, namely thef2(1270),K*(892),\(\bar K*(892)\),K*(1430), and\(\bar K*(1430)\) mesons. The data sample comes from π− Be interactions atPlab=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.
- Published
- 1994
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