Propagation of muons and taus at high energies
Propagation of muons and taus at high energies
复制标题
μ子和τ子在高能下的传播
DOI：
10.1103/physrevd.63.094020
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发表时间：
2000
影响因子：
5
通讯作者：
D. Seckel
中科院分区：
文献类型：
--
作者：
S. Dutta;M. Reno;I. Sarcevic;D. Seckel
考虑到实光子和虚光子与核子相互作用的DESY HERA结果，重新评估了光子核对带电轻子能量损失的贡献。在加入大Q{sup 2}过程后，与标准处理相比，能量为10{sup 9} GeV的岩石中的平均μ子范围仅缩小了5%。考虑到tau的衰变，我们计算了能量高达10{sup 9} GeV的tau能量损失。对tau存活概率和范围的蒙特卡罗评估表明，在能量低于10{sup 7}—10{sup 8} GeV时，取决于材料，只有tau衰变是重要的。在更高的能量下，能量损失是显著的，降低了tau的生存概率。我们发现tau的平均范围短于它的衰变长度，当入射能量为10{sup 9} GeV时，它在水中的衰变长度减少到17公里，而在该能量下它的衰变长度为49公里。在铁中，相同入射能量的平均τ范围为4.7 km。
The photonuclear contribution to charged lepton energy loss has been reevaluated taking into account DESY HERA results on real and virtual photon interactions with nucleons. With large Q{sup 2} processes incorporated, the average muon range in rock for energies of 10{sup 9} GeV is reduced by only 5% compared with the standard treatment. We have calculated the tau energy loss for energies up to 10{sup 9} GeV taking into consideration the decay of tau. A Monte Carlo evaluation of tau survival probability and range shows that at energies below 10{sup 7}--10{sup 8} GeV, depending on the material, only tau decays are important. At higher energies the tau energy losses are significant, reducing the survival probability of the tau. We show that the average range for tau is shorter than its decay length and reduces to 17 km in water for an incident tau energy of 10{sup 9} GeV, as compared with its decay length of 49 km at that energy. In iron, the average tau range is 4.7 km for the same incident energy.