Abstract
Coherent Tube Model predictions concerning secondary pion multiplicities and transverse momenta were compared with the experimental data. It was shown that the discrepancies between the model and our experimental data could not be removed by taking into account fragmentation processes.
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References
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The “universal” component of the multiplicity of π− mesons in the tube-tube collision includes the fragmentation of two protons which is the consequence of using ñ(Q) taken fromp−p data. The following calculation shows that taking into account proton fragmentation in the fragmentation part of formulae 5 does not changep Tf value. Average 〈p T〉 can be expressed as:\(\langle p_T \rangle = \frac{{n^u p_T^u + n^f p_T^f }}{{n^u + n^f }}\) wheren u is the number of “universal” pions,p Tu is the averagep T of the “universal” part (both taken from thepp data) andnv f, p fT are corresponding quantities for fragmentation part. After taking into account proton fragmentation we have:\(\langle p_T \rangle = \frac{{n^{u'} p_T^{u'} + n^{f'} p_T^{f'} }}{{n^{u'} + n^{f'} }}\) where\(\begin{gathered} n^{u'} = n^u - \Delta , n^{f'} = n^f + \Delta \hfill \\ n^{u'} p_T^{u'} = n^u p_T^u - \Delta p_T^{f'} \hfill \\ \end{gathered} \) Comparing these two expressions we get\(p_T^f = p_T^{f'} \) Exact calculation (i.e. based on the formulae (4) and (5)) gives the same result
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Anikina, M.K., Gaździcki, M., Golokhvastov, A.I. et al. Test of the Coherent Tube Model approach to relativistic nucleus-nucleus interactions. Z. Phys. C - Particles and Fields 18, 109–111 (1983). https://doi.org/10.1007/BF01572470
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DOI: https://doi.org/10.1007/BF01572470