PAMELA实验中正电子识别的统计方法
高能天体物理现象
2014-11-20 v1
摘要
PAMELA卫星实验测量了1.5 GeV至100 GeV之间的宇宙射线正电子分数。为可靠区分正电子信号与质子本底，需要开发一种专门的分析程序。本文描述了一种正电子识别方法，并展示了其稳定性以及给出正确本底估计的能力。分析包括新的实验数据、对本底样本应用三种不同的拟合技术，以及由于本底选择可能不准确而导致的系统不确定性的估计。新的实验结果既证实了太阳调制对低刚度宇宙射线的影响，也证实了10 GeV以上异常正电子丰度的存在。
引用
@article{arxiv.1001.3522,
title = {A statistical procedure for the identification of positrons in the PAMELA experiment},
author = {O. Adriani and G. C. Barbarino and G. A. Bazilevskaya and R. Bellotti and M. Boezio and E. A. Bogomolov and L. Bonechi and M. Bongi and V. Bonvicini and S. Borisov and S. Bottai and A. Bruno and F. Cafagna and D. Campana and R. Carbone and P. Carlson and M. Casolino and G. Castellini and L. Consiglio and M. P. De Pascale and C. De Santis and N. De Simone and V. Di Felice and A. M. Galper and W. Gillard and L. Grishantseva and P. Hofverberg and G. Jerse and S. V. Koldashov and S. Y. Krutkov and A. N. Kvashnin and A. Leonov and V. Malvezzi and L. Marcelli and W. Menn and V. V. Mikhailov and E. Mocchiutti and A. Monaco and N. Mori and N. Nikonov and G. Osteria and P. Papini and M. Pearce and P. Picozza and M. Ricci and S. B. Ricciarini and L. Rossetto and M. Simon and R. Sparvoli and P. Spillantini and Y. I. Stozhkov and A. Vacchi and E. Vannuccini and G. Vasilyev and S. A. Voronov and J. Wu and Y. T. Yurkin and G. Zampa and N. Zampa and V. G. Zverev and D. Marinucci},
journal= {arXiv preprint arXiv:1001.3522},
year = {2014}
}
备注
27 pages, 11 figures, 3 tables