Chinese Physics C > 2000, Vol. 24 > Issue(1): 49-59

Influence of the K^－Mesons Absorption to Their Production in the Heavy-Ion Collisions

China Institute of Atomic Energy, Beijing 102413, China2 Center of Nuclear Theory, National Laboratory of Heavylon Accelerator, Lanzhou 730000, China3 Physics Department, Northwest University, Xi'an 710069, China4 Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China

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Abstract：
We have investigated the yield and the spectrum of the K ^－mesons in the heavy-ion collisions with the relativistic RBUU approach. It's found that the ratio of the yield of K ⁺to K ^－depends on the size of the nuclear systems. One main reason is caused by the absorption effect of the K ^－mesons in the nuclear medium. We have found that the mean-absorption path of the K ^－mesons are different for light nuclear system and for the middle or heavy nuclear systems. The extent of the absorption of K ^－mesons is different for different elementary production channels. It's one important reason to make the channel Bπ→K ^－X play an important role in the K ^－production, especially for light and middle systems.

References

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LI QingFeng, LI ZhuXia and SUN XiuQuan. Influence of the K ^－Mesons Absorption to Their Production in the Heavy-Ion Collisions[J]. Chinese Physics C, 2000, 24(1): 49-59.

LI QingFeng, LI ZhuXia and SUN XiuQuan. Influence of the K ^－Mesons Absorption to Their Production in the Heavy-Ion Collisions[J]. Chinese Physics C, 2000, 24(1): 49-59. shu

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Received: 1998-11-09
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

Influence of the K^－Mesons Absorption to Their Production in the Heavy-Ion Collisions

Corresponding author:LI QingFeng,

China Institute of Atomic Energy, Beijing 102413, China2 Center of Nuclear Theory, National Laboratory of Heavylon Accelerator, Lanzhou 730000, China3 Physics Department, Northwest University, Xi'an 710069, China4 Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China

Received Date:1998-11-09
Accepted Date:1900-01-01
Available Online:2000-01-05

Abstract:We have investigated the yield and the spectrum of the K^－mesons in the heavy-ion collisions with the relativistic RBUU approach. It's found that the ratio of the yield of K⁺to K^－depends on the size of the nuclear systems. One main reason is caused by the absorption effect of the K^－mesons in the nuclear medium. We have found that the mean-absorption path of the K^－mesons are different for light nuclear system and for the middle or heavy nuclear systems. The extent of the absorption of K^－mesons is different for different elementary production channels. It's one important reason to make the channel Bπ→K^－X play an important role in the K^－production, especially for light and middle systems.