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Featured researches published by J. Pišút.


Physics Letters B | 1988

An alternative mechanism of Jψ suppression in heavy ion collisions

J. Ftáčnik; Peter Lichard; J. Pišút

Abstract We argue that J ψ suppression observed recently in high energy oxygen-uranium collisions by the NA38 Collaboration at CERN need not imply that the quark-gluon plasma was produced. A considerable part of the effect may be caused by the disintegration of J ψ s in collisions with dense hadronic matter (below the phase transition into quark-gluon plasma) produced simultaneously with J ψ in heavy ion interactions.


Nuclear Physics | 1968

Rho-meson shape

J. Pišút; Matts Roos

Abstract A detailed description is developed for the invariant dipion mass distribution in the reaction π p → ππ N. Based on OPEM and modified phenomenologically this “generalized Breit-Wigner” formula accounts for peripheral production, t -dependence of the ϱ parameters, skewness of the ϱ peak, energy dependence of the ϱ width, energ-dependent departure from OPEM, background, and background interference. Contributions from other ππ partial waves are included and the possibility of ϱ being a CDD pole considered. The formula is used on a data compilation of large statistics and conclusions concerning the presence of the various terms and the ϱ parameters are reached. Finally, we compare the width of the pion-produced ϱ meson with the width of the e + e − produced ϱ meson.


Physics Letters B | 1988

An Alternative Mechanism of

J. Ftacnik; J. Pišút; Peter Lichard

Abstract We argue that J ψ suppression observed recently in high energy oxygen-uranium collisions by the NA38 Collaboration at CERN need not imply that the quark-gluon plasma was produced. A considerable part of the effect may be caused by the disintegration of J ψ s in collisions with dense hadronic matter (below the phase transition into quark-gluon plasma) produced simultaneously with J ψ in heavy ion interactions.


Physics Letters B | 1990

J/\psi

Peter Koch; Ulrich Heinz; J. Pišút

Abstract We point out that recent indications from the NA38 Collaboration for an increase of the φ/(ω+ϱ0) ratio in central 200A GeV O+U and S+U collisions at CERN give evidence for an approach to chemical equilibrium in these systems. Under the assumption (which is supported by previous theoretical work) that the J/ψ suppression found in the same experiment under similar kinematic conditions is due to final state absorption via rescattering in the dense collision zone, we solve the rate equations for φ-production and -absorption via secondary collisions in the reaction zone. Eliminating unknown geometrical parameters of the collision zone by using the J/ψ suppression data, we obtain a quantitative description of the measured φ enhancement.


Physics Letters B | 2004

Suppression in Heavy Ion Collisions

F Antinori; P Bacon; A. Badalà; R. Barbera; A. Belogianni; A. Bhasin; I. J. Bloodworth; M Bombara; G. E. Bruno; S.A. Bull; R. Caliandro; M. Campbell; N Carrer; R.F. Clarke; Andrea Dainese; A.P. de Haas; P.C. de Rijke; D. Di Bari; S. Di Liberto; R. Divià; D. Elia; D. Evans; G. Feofilov; R.A. Fini; P. Ganoti; B. Ghidini; G. Grella; H. Helstrup; K. F. Hetland; A.K. Holme

A measurement of strange baryon and antibaryon production in Pb-Pb collisions has been carried out by the NA57 experiment at the CERN SPS, with 40 and 158 A GeV/c beam momentum. Results on


Physics Letters B | 1987

φ-enhancement and J/ψ suppression in nuclear collisions by rescattering of secondary hadrons

J. Ftác̆nik; K. Kajantie; N. Pisutova; J. Pišút

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Physics Letters B | 1988

Energy dependence of hyperon production in nucleus–nucleus collisions at SPS

I. Horváth; Peter Lichard; R. Lietava; A. Nogova; J. Pišút

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European Physical Journal C | 1986

On the transverse energy distributions in the central rapidity region of 16O+Pb collisions at 200 GeV per nucleon

V. Černý; Peter Lichard; J. Pišút

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Physics Letters B | 1977

On the time dependence of J/ψ suppression by the quark-gluon plasma

V. Černý; Peter Lichard; J. Pišút

and


Nuclear Physics | 1969

A clear-cut test of low mass dilepton production mechanism in hadronic collisions

J. Pišút; P. Prešnajder

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N. Pisutova

Comenius University in Bratislava

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R. Caliandro

Instituto Politécnico Nacional

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G. Grella

University of Salerno

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G. Feofilov

Saint Petersburg State University

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