AN ULTRA-HIGH ENERGY NUCLEAR INTERACTION EVENT OF LARGE TRANSVERSE MOMENTUM

Ren Jing-ru; Lu Sui-ling; Su Sui; Wang Yun-xin; Wang Dian-chen; Pan Ji-rong; He Mao; ZHang Nai-jian; Cao Pei-yuan; Chen Yun-hong

Chinese Physics C> 1980, Vol. 4> Issue(3) : 349-355

AN ULTRA-HIGH ENERGY NUCLEAR INTERACTION EVENT OF LARGE TRANSVERSE MOMENTUM

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Abstract：
An emulsion chamber of 13 tons Pb was exposed on Mt. Kanbala (5500 m abovesea level) of Tibet. A very interesting ultra-high energy event with total observedenergy ΣE_Υ=445 TeV was obtained. The profile of the event is characterised by twogroups of high energy showers, separated clearly from each other. Preliminary analysisshows that the particles giving rise to these two shower groups have extraordina-rily large transverse momenta. This predicts the possible existence of a new mechanismin ultra-high energy nuclear interactions, which has certain characteristics differentfrom those predicted by the H-quantum and SH-quantum models.

References

[1]

中国科学院高能物理研究所乳胶室组,物理学报,25(1976),342.[2] 任敬儒等,高能物理与核物理,2(1978),318.[3] M.Akashi et al., Proc. 15th Int. Conf. on Cosmio Rays, Plovdiv, 7(1977), 184.[4] N.Arata. Nuovo Cim., 43A(1978), 455.[5] J.Nishimura, Suppd. Prog. Theor. Phys., 32(1964), 72.[6] I.Ohta, Suppl. Prog. Theor. Fhys., 47(1971), 271.[7] M. Aka,shi et al., Proc. 15th, Int, Conf. on Cosmic Rays. Plovdiv, 7(1977). 190.[8] Japanes-Brazilian Emulsion Chamber Group, Suuppl. Prog. Theor, Phys., 47(1971), 1.[9] A. Y. Apanasenko et al., Proe. 15th, Cone. on Cosmic Rays, Plovdiv, 7(1977), 220,[10] I. Ohta et al., Proc. International Cosmic Ray Symposiun on High Energy Plienomena, (1974),33.

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Ren Jing-ru, Lu Sui-ling, Su Sui, Wang Yun-xin, Wang Dian-chen, Pan Ji-rong, He Mao, ZHang Nai-jian, Cao Pei-yuan and Chen Yun-hong. AN ULTRA-HIGH ENERGY NUCLEAR INTERACTION EVENT OF LARGE TRANSVERSE MOMENTUM[J]. Chinese Physics C, 1980, 4(3): 349-355.

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Received: 1979-04-21
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

AN ULTRA-HIGH ENERGY NUCLEAR INTERACTION EVENT OF LARGE TRANSVERSE MOMENTUM

Received Date: 1979-04-21
Accepted Date: 1900-01-01
Available Online: 1980-06-05

Abstract: An emulsion chamber of 13 tons Pb was exposed on Mt. Kanbala (5500 m abovesea level) of Tibet. A very interesting ultra-high energy event with total observedenergy ΣE_Υ=445 TeV was obtained. The profile of the event is characterised by twogroups of high energy showers, separated clearly from each other. Preliminary analysisshows that the particles giving rise to these two shower groups have extraordina-rily large transverse momenta. This predicts the possible existence of a new mechanismin ultra-high energy nuclear interactions, which has certain characteristics differentfrom those predicted by the H-quantum and SH-quantum models.