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Energy dependence of multiplicity in proton-nucleus collisions and models of multiparticle production

  • Nuclear And Particle Physics
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Abstract

This is a continuation of our earlier investigation (Gurtuet al 1974Phys. Lett. 50 B 391) on multiparticle production in proton-nucleus collisions based on an exposure of emulsion stack to 200 GeV/c beam at the NAL. It is found that the ratioR em = 〈n s〉/〈n ch〉, where 〈n ch〉 is the charged particle multiplicity in pp-collisions, increases slowly from about 1 at 10 GeV/c to 1·6 at 68 GeV/c and attains a constant value of 1·71 ± 0·04 in the region 200 to 8000 GeV/c. Furthermore,R em = 1·71 implies an effectiveA-dependence ofR A =A 0.18,i.e., a very weak dependence. Predictions ofR em on various models are discussed and compared with the emulsion data. Data seem to favour models of hadron-nucleon collisions in which production of particles takes place through adouble step mechanism,e.g., diffractive excitation, hydrodynamical and energy flux cascade as opposed to models which envisage instantaneous production.

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Authors and Affiliations

  1. Tata Institute of Fundamental Research, 400005, Bombay

    A Gurtu & P K Malhotra

  2. Physics Department, Panjab University, 160014, Chandigarh

    I S Mittra & P M Sood

  3. Physics Department, Jammu University, 180001, Jammu-Tawi

    SC Gupta, VK Gupta, GL Kaul, LK Mangotra, Y Prakash, NK Rao & ML Sharma

Authors
  1. A Gurtu
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  2. P K Malhotra
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  3. I S Mittra
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  4. P M Sood
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  5. SC Gupta
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  6. VK Gupta
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  7. GL Kaul
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  8. LK Mangotra
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  9. Y Prakash
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  10. NK Rao
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  11. ML Sharma
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Gurtu, A., Malhotra, P.K., Mittra, I.S. et al. Energy dependence of multiplicity in proton-nucleus collisions and models of multiparticle production. Pramana - J Phys 3, 311–322 (1974). https://doi.org/10.1007/BF02846072

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  • DOI: https://doi.org/10.1007/BF02846072

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