Abstract
Transverse-momentum distributions of doubly charged fragments of sulfur and lead nuclei having energies of 200 and 160 GeV per nucleon and interacting with nuclei in a track emulsion were investigated. No trace of compression or heating of nuclear matter in the interaction of these nuclei with track-emulsion nuclei was revealed experimentally. Transverse momenta of fragments of relativistic nuclei were found to obey a normal distribution that corresponds to a degenerate momentum distribution of nucleons in the ground state of a nucleus before its interaction with a track-emulsion nucleus. There is no piece of evidence that fragments of relativistic nuclei originate from some excited state of an intermediate nucleus. This picture of the fragmentation of relativistic nuclei complies with the naive parton model proposed by Feynman and Gribov. In summary, the fragmentation of relativistic nuclei at energies of 160 and 200 GeV per nucleon is cold and fast.
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References
I. I. Gurevich, A. P. Zhdanov, and A. I. Filippov, Dokl. Akad. Nauk 18, 169 (1938).
J. J. Lord, J. Fainberg, and M. Schein, Phys. Rev. 80, 970 (1950).
R. Serber, Phys. Rev. 72, 1114 (1947).
E. J. Moniz et al., Phys. Rev. Lett. 26, 445 (1971).
F. G. Lepekhin, in Proceedings of the 31st Winter School of PIYad. Fiz. on Physics of Atomic Nucleus and Elementary Particles (S.-Peterburg, 1997), p. 315.
F. G. Lepekhin, in Proceedings of the 30th Winter School of PIYad. Fiz. on Physics of Atomic Nucleus and Elementary Particles (S.-Peterburg, 1996), p. 187.
K. Adcox et al., Nucl. Phys. A 757, 184 (2005).
R. Hagedorn, Nuovo Cimento Suppl. 3, 147 (1965).
A. Adare et al., Phys. Rev. C 81, 034911 (2010).
A. S. Goldhaber, Phys. Lett. B 53, 306 (1974).
O. V. Levitskaya, F. G. Lepekhin, and B. B. Simonov, Preprint LIYad. Fiz.-1556 (Gatchina, Leningrad Inst. Nucl. Phys., 1989).
E. A. Kotikov and F. G. Lepekhin, Preprint PIYad. Fiz.-2797 (Gatchina, Petersburg Inst. Nucl. Phys., 2002).
V. V. Dobyrn, E. A. Kotikov, and F. G. Lepekhin, Preprint PIYad. Fiz.-2784 (Gatchina, Petersburg Inst. Nucl. Phys., 2008).
F. G. Lepekhin, http://hepd.pnpi.spb.ru/ofve/nni/pbs32.htm
F. G. Lepekhin, O. V. Levitskaya, D. M. Seliverstov, and B. B. Simonov, Prepint No. 2252, PNPI (Gatchina, Petersburg Inst. Nucl. Phys., 1998).
M. I. Adamovich et al., Phys. Lett. B 390, 445 (1997).
M. I. Adamovich et al., Eur. Phys. J. A 6, 421 (1999).
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Original Russian Text © F.G. Lepekhin, L.N. Tkach, 2011, published in Yadernaya Fizika, 2011, Vol. 74, No. 5, pp. 747–751.
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Lepekhin, F.G., Tkach, L.N. Transverse momenta of fragments of relativistic sulfur and lead nuclei after their interaction with track-emulsion nuclei at energies of 200 and 160 GeV per nucleon. Phys. Atom. Nuclei 74, 721–725 (2011). https://doi.org/10.1134/S1063778811050164
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DOI: https://doi.org/10.1134/S1063778811050164