手征动力学在 $\pi^- \gamma \to \pi^- \pi^- \pi^+$ 反应中的首次测量
高能物理 - 实验
2015-06-03 v2
摘要
欧洲核子研究中心（CERN）的 COMPASS 合作组研究了嵌入在 190 GeV pion 入射铅靶的 Primakoff 反应中的、质心能量低于五倍 pion 质量（）的 反应。通过分离在最小动量转移 (GeV/c) 处观测到的尖锐库仑峰，筛选出准实光子交换。利用分波分析技术，提取了以手征动力学描述的库仑产生散射强度及其对 不变质量 的依赖关系。在 的七个区间内确定了绝对截面，总体精度为 20%。结果发现，在领头阶下，整个研究能量范围内与手征微扰论的预言符合良好。
引用
@article{arxiv.1111.5954,
title = {First Measurement of Chiral Dynamics in \pi^- \gamma -> \pi^- \pi^- \pi^+},
author = {M. G. Alekseev and V. Yu. Alexakhin and Yu. Alexandrov and G. D. Alexeev and A. Amoroso and A. Austregesilo and B. Badelek and F. Balestra and J. Barth and G. Baum and Y. Bedfer and J. Bernhard and R. Bertini and M. Bettinelli and K. Bicker and R. Birsa and J. Bisplinghoff and P. Bordalo and F. Bradamante and A. Bravar and A. Bressan and E. Burtin and D. Chaberny and M. Chiosso and S. U. Chung and A. Cicuttin and M. L. Crespo and S. Dalla Torre and S. Das and S. S. Dasgupta and O. Yu. Denisov and L. Dhara and S. V. Donskov and N. Doshita and V. Duic and W. Dünnweber and M. Dziewiecki and A. Efremov and P. D. Eversheim and W. Eyrich and M. Faessler and A. Ferrero and A. Filin and M. Finger and M. Finger and H. Fischer and C. Franco and N. du Fresne von Hohenesche and J. M. Friedrich and R. Garfagnini and F. Gautheron and O. P. Gavrichtchouk and R. Gazda and S. Gerassimov and R. Geyer and M. Giorgi and I. Gnesi and B. Gobbo and S. Goertz and S. Grabm\" uller and A. Grasso and B. Grube and R. Gushterski and A. Guskov and F. Haas and D. von Harrach and T. Hasegawa and F. H. Heinsius and F. Herrmann and C. Hess and F. Hinterberger and N. Horikawa and Ch. Höppner and N. d'Hose and S. Huber and S. Ishimoto and O. Ivanov and Yu. Ivanshin and T. Iwata and R. Jahn and P. Jasinski and G. Jegou and R. Joosten and E. Kabuss and D. Kang and B. Ketzer and G. V. Khaustov and Yu. A. Khokhlov and Yu. Kisselev and F. Klein and K. Klimaszewski and S. Koblitz and J. H. Koivuniemi and V. N. Kolosov and K. Kondo and K. Königsmann and I. Konorov and V. F. Konstantinov and A. Korzenev and A. M. Kotzinian and O. Kouznetsov and M. Krämer and Z. V. Kroumchtein and F. Kunne and K. Kurek and L. Lauser and A. A. Lednev and A. Lehmann and S. Levorato and J. Lichtenstadt and A. Maggiora and A. Magnon and N. Makke and G. K. Mallot and A. Mann and C. Marchand and A. Martin and J. Marzec and F. Massmann and T. Matsuda and W. Meyer and T. Michigami and Yu. V. Mikhailov and M. A. Moinester and A. Morreale and A. Mutter and A. Nagaytsev and T. Nagel and F. Nerling and S. Neubert and D. Neyret and V. I. Nikolaenko and W. -D. Nowak and A. S. Nunes and A. G. Olshevsky and M. Ostrick and A. Padee and R. Panknin and D. Panzieri and B. Parsamyan and S. Paul and E. Perevalova and G. Pesaro and D. V. Peshekhonov and G. Piragino and S. Platchkov and J. Pochodzalla and J. Polak and V. A. Polyakov and G. Pontecorvo and J. Pretz and C. Quintans and J. -F. Rajotte and S. Ramos and V. Rapatsky and G. Reicherz and A. Richter and E. Rocco and E. Rondio and D. I. Ryabchikov and V. D. Samoylenko and A. Sandacz and H. Santos and M. G. Sapozhnikov and S. Sarkar and I. A. Savin and G. Sbrizzai and P. Schiavon and C. Schill and T. Schlüter and L. Schmitt and S. Schopferer and W. Schröder and O. Yu. Shevchenko and H. -W. Siebert and L. Silva and L. Sinha and A. N. Sissakian and M. Slunecka and G. I. Smirnov and S. Sosio and F. Sozzi and A. Srnka and M. Stolarski and M. Sulc and R. Sulej and P. Sznajder and S. Takekawa and S. Tessaro and F. Tessarotto and A. Teufel and L. G. Tkatchev and S. Uhl and I. Uman and M. Vandenbroucke and M. Virius and N. V. Vlassov and R. Windmolders and W. Wiślicki and H. Wollny and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and M. Ziembicki and N. Zhuravlev and A. Zvyagin},
journal= {arXiv preprint arXiv:1111.5954},
year = {2015}
}
备注
10 pages, 5 figures