核碰撞中热双轻子角分布的首批结果
核实验
2014-11-18 v1
摘要
CERN SPS的NA60实验研究了158A GeV In-In碰撞中的双μ子产生。在完整质量区域0.2<M<2.6 GeV内发现的超出已知源的强子对过剩此前被解释为热辐射。我们现在展示相关的角分布的首批结果。使用Collins-Soper参考系，测得结构函数参数 \lambda, \mu 和 \nu 为零，并且发现极角和方位角的投影分布是均匀的。没有任何极化这一现象与将过剩的双μ子解释为来自随机化系统的热辐射相一致。
引用
@article{arxiv.0812.3100,
title = {First results on angular distributions of thermal dileptons in nuclear collisions},
author = {NA60 Collaboration and R. Arnaldi and K. Banicz and K. Borer and J. Castor and B. Chaurand and W. Chen and C. Cicalo and A. Colla and P. Cortese and S. Damjanovic and A. David and A. de Falco and A. Devaux and L. Ducroux and H. En'yo and J. Fargeix and A. Ferretti and M. Floris and A. Foerster and P. Force and N. Guettet and A. Guichard and H. Gulkanian and J. M. Heuser and M. Keil and L. Kluberg and Z. Li and C. Lourenco and J. Lozano and F. Manso and P. Martins and A. Masoni and A. Neves and H. Ohnishi and C. Oppedisano and P. Parracho and P. Pillot and T. Poghosyan and G. Puddu and E. Radermacher and P. Ramalhete and P. Rosinsky and E. Scomparin and J. Seixas and S. Serci and R. Shahoyan and P. Sonderegger and H. J. Specht and R. Tieulent and G. Usai and R. Veenhof and H. K. Woehri},
journal= {arXiv preprint arXiv:0812.3100},
year = {2014}
}
备注
Submitted to Physical Review Letters