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    • Keywords


      Hadron–nucleus interaction; erraticity; entropy index.

    • Abstract


      Event-to-event fluctuation pattern of pions produced by proton and pion beams is studied in terms of the newly defined erraticity measures $\chi (p, q)$, $\chi_{q}^{'}$ and $\mu_{q}^{'}$ proposed by Cao and Hwa. The analysis reveals the erratic behaviour of the produced pions signifying the chaotic multiparticle production in high-energy hadron–nucleus interactions ($\pi^{-}$ –AgBr interactions at 350 GeV/c and 𝑝–AgBr interactions at 400 GeV/c). However, the chaoticity does not depend on whether the projectile is proton or pion. The results are compared with the results of the VENUS-generated data for the above interactions which suggests that VENUS event generator is unable to reproduce the event-to-event fluctuations of spatial patterns of final states. A comparative study of 𝑝–AgBr interactions and $p-p$ collisions at 400 GeV/c from NA27, with the help of a quantitative parameter for the assessment of pion fluctuation, indicates conclusively that particle production process is more chaotic for hadron–nucleus interactions than for hadron–hadron interactions.

    • Author Affiliations


      Dipak Ghosh1 Argha Deb1 Mitali Mondal2 Arindam Mondal3 Sitram Pal4

      1. Nuclear and Particle Physics Research Centre, Department of Physics, Jadavpur University, Kolkata 700 032, India
      2. S.A. Jaipuria College, Kolkata 700 005, India
      3. RCC Institute of Information Technology, Canal South Road, Beliaghata, Kolkata 700 015, India
      4. Kanchrapara College, Kanchrapara, North 24 Parganas, West Bengal, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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