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25 April 2024

» arxiv » 1304.6220

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Quark cluster contribution to cumulative proton emission in fragmentation of carbon ions
B. M. Abramov ; P.N. Alekseev ; Yu. A. Borodin ; S. A. Bulychjov ; I. A. Dukhovskoy ; A. I. Khanov ; A. P. Krutenkova ; V. V. Kulikov ; M. A. Martemyanov ; M. A. Matsyuk ; E. N. Turdakina ;
Date:	23 Apr 2013
Abstract:	In the FRAGM experiment at heavy ion accelerator complex TWAC-ITEP, the proton yields at an angle 3.5$^circ$ have been measured at fragmentation of carbon ions at $T_0 = $ 0.6, 0.95 and 2.0 GeV/nucleon on beryllium target. The data are presented as invariant proton yields on cumulative variable $x$ in the range 0.9 < $x$ < 2.4. Proton spectra cover six orders of invariant cross section magnitude. They have been analyzed in the framework of quark cluster fragmentation model. Fragmentation functions of quark-gluon string model are used. The probabilities of the existence of multi-quark clusters in carbon nuclei are estimated to be 8--12% for six-quark clusters and 0.2--0.6% for nine-quark clusters.
Source:	arXiv, 1304.6220
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