Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state?

T. Arisawa; Y. Fujimoto; S. Hasegawa; K. Honda; H. Ito; V. V. Kopenkin; H. Semba; M. Tamada; K. Yokoi; G. F. Fedorova; I. P. Ivanenko; A. K. Managadze; I. A. Mikhailova; E. G. Popova; I. V. Rakobolskaya; T. M. Roganova; L. G. Sveshnikova; O. P. Strogova

doi:10.1016/0550-3213(94)90295-X

Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state?

T. Arisawa^*, Y. Fujimoto, S. Hasegawa, K. Honda, H. Ito, V. V. Kopenkin, H. Semba, M. Tamada, K. Yokoi, G. F. Fedorova, I. P. Ivanenko, A. K. Managadze, I. A. Mikhailova, E. G. Popova, I. V. Rakobolskaya, T. M. Roganova, L. G. Sveshnikova, O. P. Strogova

^*Corresponding author for this work

Waseda University Senior High School

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

Experimental results are presented on high energy cosmic-ray hadron interactions recorded in homogeneous-type thick lead chambers (total thickness being 60 cm and 110 cm) exposed at the Pamirs (atmospheric depth 595 g/ cm²). High energy cosmic-ray hadron flux is measured. The attenuation mean free path of the arriving cosmic-ray hadrons of E_h^γ ≥ 6 TeV measured in the chamber is obtained as 252 ± 30 g/cm² of lead. However, for the high energy hadrons (E(γ) ≥ 10 TeV) constituting cosmic-ray families of the highest energy range, ΣE(γ) ≥ 700 TeV, which have been accumulated so far in the series exposures at the Pamirs and analysed by MSU group, the attenuation mean free path of hadrons in lead has turned out to be as short as 170_-26⁺⁴⁷ g/cm² with 95% CL by the maximum likelihood method. The present experimental result of such a short attenuation length of hadrons in cosmic-ray families is essentially consistent with that obtained for high energy hadrons (E(γ) ≥ 10 TeV) constituting the "Chiron-type" families of ΣE(γ)>100 TeV in the Chacaltaya two-storeyed chamber experiments. The anomalous transition characteristics of high energy hadrons in lead is found and examples are presented. The physical significance of the experimental results on extremely high energy hadron interactions is discussed.

Original language	English
Pages (from-to)	241-287
Number of pages	47
Journal	Nuclear Physics, Section B
Volume	424
Issue number	2
DOIs	https://doi.org/10.1016/0550-3213(94)90295-X
Publication status	Published - 1994 Aug 8

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0550-3213(94)90295-X

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Arisawa, T., Fujimoto, Y., Hasegawa, S., Honda, K., Ito, H., Kopenkin, V. V., Semba, H., Tamada, M., Yokoi, K., Fedorova, G. F., Ivanenko, I. P., Managadze, A. K., Mikhailova, I. A., Popova, E. G., Rakobolskaya, I. V., Roganova, T. M., Sveshnikova, L. G., & Strogova, O. P. (1994). Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state? Nuclear Physics, Section B, 424(2), 241-287. https://doi.org/10.1016/0550-3213(94)90295-X

Arisawa, T, Fujimoto, Y, Hasegawa, S, Honda, K, Ito, H, Kopenkin, VV, Semba, H, Tamada, M, Yokoi, K, Fedorova, GF, Ivanenko, IP, Managadze, AK, Mikhailova, IA, Popova, EG, Rakobolskaya, IV, Roganova, TM, Sveshnikova, LG & Strogova, OP 1994, 'Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state?', Nuclear Physics, Section B, vol. 424, no. 2, pp. 241-287. https://doi.org/10.1016/0550-3213(94)90295-X

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title = "Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state?",

abstract = "Experimental results are presented on high energy cosmic-ray hadron interactions recorded in homogeneous-type thick lead chambers (total thickness being 60 cm and 110 cm) exposed at the Pamirs (atmospheric depth 595 g/ cm2). High energy cosmic-ray hadron flux is measured. The attenuation mean free path of the arriving cosmic-ray hadrons of Ehγ ≥ 6 TeV measured in the chamber is obtained as 252 ± 30 g/cm2 of lead. However, for the high energy hadrons (E(γ) ≥ 10 TeV) constituting cosmic-ray families of the highest energy range, ΣE(γ) ≥ 700 TeV, which have been accumulated so far in the series exposures at the Pamirs and analysed by MSU group, the attenuation mean free path of hadrons in lead has turned out to be as short as 170-26+47 g/cm2 with 95% CL by the maximum likelihood method. The present experimental result of such a short attenuation length of hadrons in cosmic-ray families is essentially consistent with that obtained for high energy hadrons (E(γ) ≥ 10 TeV) constituting the {"}Chiron-type{"} families of ΣE(γ)>100 TeV in the Chacaltaya two-storeyed chamber experiments. The anomalous transition characteristics of high energy hadrons in lead is found and examples are presented. The physical significance of the experimental results on extremely high energy hadron interactions is discussed.",

author = "T. Arisawa and Y. Fujimoto and S. Hasegawa and K. Honda and H. Ito and Kopenkin, {V. V.} and H. Semba and M. Tamada and K. Yokoi and Fedorova, {G. F.} and Ivanenko, {I. P.} and Managadze, {A. K.} and Mikhailova, {I. A.} and Popova, {E. G.} and Rakobolskaya, {I. V.} and Roganova, {T. M.} and Sveshnikova, {L. G.} and Strogova, {O. P.}",

year = "1994",

month = aug,

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doi = "10.1016/0550-3213(94)90295-X",

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journal = "Nuclear Physics, Section B",

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T1 - Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions

T2 - New hadronic state?

AU - Arisawa, T.

AU - Fujimoto, Y.

AU - Hasegawa, S.

AU - Honda, K.

AU - Ito, H.

AU - Kopenkin, V. V.

AU - Semba, H.

AU - Tamada, M.

AU - Yokoi, K.

AU - Fedorova, G. F.

AU - Ivanenko, I. P.

AU - Managadze, A. K.

AU - Mikhailova, I. A.

AU - Popova, E. G.

AU - Rakobolskaya, I. V.

AU - Roganova, T. M.

AU - Sveshnikova, L. G.

AU - Strogova, O. P.

PY - 1994/8/8

Y1 - 1994/8/8

N2 - Experimental results are presented on high energy cosmic-ray hadron interactions recorded in homogeneous-type thick lead chambers (total thickness being 60 cm and 110 cm) exposed at the Pamirs (atmospheric depth 595 g/ cm2). High energy cosmic-ray hadron flux is measured. The attenuation mean free path of the arriving cosmic-ray hadrons of Ehγ ≥ 6 TeV measured in the chamber is obtained as 252 ± 30 g/cm2 of lead. However, for the high energy hadrons (E(γ) ≥ 10 TeV) constituting cosmic-ray families of the highest energy range, ΣE(γ) ≥ 700 TeV, which have been accumulated so far in the series exposures at the Pamirs and analysed by MSU group, the attenuation mean free path of hadrons in lead has turned out to be as short as 170-26+47 g/cm2 with 95% CL by the maximum likelihood method. The present experimental result of such a short attenuation length of hadrons in cosmic-ray families is essentially consistent with that obtained for high energy hadrons (E(γ) ≥ 10 TeV) constituting the "Chiron-type" families of ΣE(γ)>100 TeV in the Chacaltaya two-storeyed chamber experiments. The anomalous transition characteristics of high energy hadrons in lead is found and examples are presented. The physical significance of the experimental results on extremely high energy hadron interactions is discussed.

AB - Experimental results are presented on high energy cosmic-ray hadron interactions recorded in homogeneous-type thick lead chambers (total thickness being 60 cm and 110 cm) exposed at the Pamirs (atmospheric depth 595 g/ cm2). High energy cosmic-ray hadron flux is measured. The attenuation mean free path of the arriving cosmic-ray hadrons of Ehγ ≥ 6 TeV measured in the chamber is obtained as 252 ± 30 g/cm2 of lead. However, for the high energy hadrons (E(γ) ≥ 10 TeV) constituting cosmic-ray families of the highest energy range, ΣE(γ) ≥ 700 TeV, which have been accumulated so far in the series exposures at the Pamirs and analysed by MSU group, the attenuation mean free path of hadrons in lead has turned out to be as short as 170-26+47 g/cm2 with 95% CL by the maximum likelihood method. The present experimental result of such a short attenuation length of hadrons in cosmic-ray families is essentially consistent with that obtained for high energy hadrons (E(γ) ≥ 10 TeV) constituting the "Chiron-type" families of ΣE(γ)>100 TeV in the Chacaltaya two-storeyed chamber experiments. The anomalous transition characteristics of high energy hadrons in lead is found and examples are presented. The physical significance of the experimental results on extremely high energy hadron interactions is discussed.

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JO - Nuclear Physics, Section B

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ER -

Observation of attenuation behaviour of hadrons in extremely high energy cosmic ray interactions: New hadronic state?

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