System size dependence in backward relativistic hadron production in pA and AA collisions

B. M. Badawy

doi:10.1088/1674-1137/38/11/114001

Chinese Physics C> 2014, Vol. 38> Issue(11) : 114001 DOI: 10.1088/1674-1137/38/11/114001

System size dependence in backward relativistic hadron production in pA and AA collisions

B. M. Badawy ^,

1.
Reactor Physics Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt

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Abstract：
In this comprehensive study the multiplicity characteristics of the backward emitted relativistic hadron (shower particle) through hadron-nucleus and nucleus-nucleus are overviewed in three dimensions. These dimensions are the projectile size, target size, and energy. To confirm the universality in this production system, wide ranges of system size and energy (E_lab～ 2.1 A up to 200 A GeV) are used. The multiplicity characteristics of this hadron imply a limiting behavior with respect to the projectile size and energy. The target size is the main effective parameter in this production system. The exponential decay shapes is a characteristic feature of the backward shower particle multiplicity distributions. The decay constant changes with the target size to be nearly 2.02, 1.41, and 1.12 for the interactions with CNO, Em, and AgBr nuclei, respectively, irrespective of the projectile size and energy. While the backward production probability and average multiplicity are constants at different projectile sizes and energies, they can be correlated with the target size in power law relations.

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B. M. Badawy. System size dependence in backward relativistic hadron production in pA and AA collisions[J]. Chinese Physics C, 2014, 38(11): 114001. doi: 10.1088/1674-1137/38/11/114001

B. M. Badawy. System size dependence in backward relativistic hadron production in pA and AA collisions[J]. Chinese Physics C, 2014, 38(11): 114001. doi: 10.1088/1674-1137/38/11/114001 shu

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Received: 2013-12-04
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沈阳化工大学材料科学与工程学院沈阳 110142

System size dependence in backward relativistic hadron production in pA and AA collisions

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System size dependence in backward relativistic hadron production in pA and AA collisions

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