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A cosmic-ray nuclear event with an anomalously strong concentration of energy and particles in the central region

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Il Nuovo Cimento C

Summary

A cosmic-ray-induced nuclear event detected in an emulsion chamber is described. The event consists of 217 shower cores with ∑E γ=1.275TeV. In a logarithmic scale, energy and particles are emitted most densely at the small lateral distance corresponding to 0.5 mm; 77% of the total energy and 61% of the total multiplicity are inside a radius of 0.65 cm. The shower cores in the central region show exponential-type energy distribution and nonisotropic azimuthal distribution. This event indicates the possibility that phenomena of large transverse momentum could happen to produce a strong concentration of energy and particles in the very forward direction.

Riassunto

Si descrive un evento nucleare indotto da raggi cosmici rilevato in camera ad emulsione. L'evento consiste di 217 nuclei di sciame con ∑E γ=1.275TeV. In scale logaritmica l'energia e le particelle sono emesse piú densamente alla piccola distanza laterale corrispondente a 0.5 mm; il 77% dell'energia totale e il 61% della molteplicità totale si trovano all'interno di un raggio di 0.65 cm. I nuclei dello sciame nella regione centrale mostrano una distribuzione energetica di tipo esponenziale e una distribuzione azimutale non isotropica. Questo evento indica la possibilità che i fenomeni di ampio impulso trasverso producano una forte concentrazione di energia e particelle in una direzione molto avanzata.

Резюме

Описывается ядерное событие, зарегистрированное в эмульсионной камере, которое было индуцировано космическими лучами. Событие состоит из 217 ядер ливней с ∑E γ=1.275TeV. В логарифмическом масштабе, энергия и частицы испускаются с наибольшей вероятностью на малом поперечном расстоянии, соответствующем 0.5 мм; 77% полной энергии и 61% полной обнаруживают экспоненциальный характер энергетического распределения и неизотропное азимуталяное распределения. Это событие указывает на бозможность, что явления с большим поперечным импульсом могут приводить к сильной концентрации энергии и частиц вблизи направления вперед.

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References

  1. C. M. G. Lattes, Y. Fujimoto andS. Hasegawa:Phys. Rep.,65, 151 (1980).

    Article  ADS  Google Scholar 

  2. Brasil-Japan Collaboration (C. M. G. Lattes et al.):Suppl. Prog. Theor. Phys.,47, 1 (1971);A. Ohsawa: ICR-Report-112-83, 65 (1983).

    Google Scholar 

  3. J. A. Chinellato: Dr. Thesis, Universidade Estadual de Campinas (1981).

  4. S. Yamashita:J. Phys. Soc. Jpn.,54, 529 (1985).

    Article  ADS  Google Scholar 

  5. Pamir Collaboration (S. G. Bayburina et al.): inProceedings of the XVII International Cosmic Ray Conference, Paris, 1981, Vol. 5, p. 290;Pamir Collaboration (A. S. Borysov et al.): inProceedings of the International Symposium on Cosmic Rays and Particle Physics, Tokyo, 1984, p. 3.

  6. Mt. Fuji Collaboration (M. Akashi et al.):Nuovo Cimento A,67, 221 (1982);Mt. Fuji Collaboration (M. Amenomori et al.): inProceedings of the International Symposium on Cosmic Rays and Particle Physics, Tokyo, 1984, p. 76.

    Google Scholar 

  7. China-Japan Emulsion Chamber Collaboration (J. R. Ren et al.): inProceedings of the XIX International Cosmic Ray Conference, La Jolla, 1985, Vol.6, p. 309, 317; inProceedings of the International Symposium on Cosmic Rays and Particle Physics, Tokyo, 1984, p. 87.

  8. T. Shibata: private communication.

  9. N. M. Amato, N. Arata andR. H. C. Maldonado: inProceedings of the XVIII International Cosmic Ray Conference, Bangalore, 1983, Vol.11, p. 145; inProceedings of the International Symposium on Cosmic Ray Superhigh Energy Interaction, Beijing, 1986, Vol.4, p. 37.

  10. M. Shibata:Phys. Rev. D,24, 1847 (1981);M. Akashi, M. Amenomori, E. Konishi, H. Nanjo, Z. Watanable, K. Mizutani, K. Kasahara, S. Torii, T. Yuda, T. Shirai, N. Tateyama, T. Taira, I. Mito, M. Shibata, H. Sugimoto, K. Taira andN. Hotta:Phys. Rev. D,24, 2353 (1981);Mt. Fuji Collaboration and Japan-China Collaboration (J. R. Ren et al.): inProceedings of the XIX International Cosmic Ray Conference, La Jolla, 1985, Vol.6, p. 336.

    Article  ADS  Google Scholar 

  11. N. M. Amato, N. Arata andR. H. C. Maldonado: inProceedings of the XIX International Cosmic Ray Conference, La Jolla, 1985, Vol.6, p. 320.

  12. Brasil-Japan Collaboration (J. A. Chinellato et al.): inProceedings of the XIX International Cosmic Ray Conference, La Jolla, 1985, Vol.6, p. 360.

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Authors and Affiliations

  1. Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Rio de Janeiro, RJ, Brasil

    N. M. Amato & N. Arata

  2. Instituto de Física, Universidade Federal Fluminense, Niteroi, RJ, Brasil

    R. H. C. Maldonado

Authors
  1. N. M. Amato
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  2. N. Arata
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  3. R. H. C. Maldonado
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Amato, N.M., Arata, N. & Maldonado, R.H.C. A cosmic-ray nuclear event with an anomalously strong concentration of energy and particles in the central region. Il Nuovo Cimento C 10, 559–569 (1987). https://doi.org/10.1007/BF02507251

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  • DOI: https://doi.org/10.1007/BF02507251

PACS. 94.40.Rc

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