观测到新的窄轴矢量介子 $a_1(1420)$
高能物理 - 实验
2016-12-23 v3
摘要
CERN 的 COMPASS 合作组利用静止氢靶，测量了 190 GeV/ 介子衍射离解为 末态的过程。我们在 质量和四动量转移的分箱中，使用同位旋模型及迄今为止包含 88 个分波的最大分波分析 (PWA) 模型进行了分波分析。在 道中观测到一个窄的 信号。我们呈现了一项共振模型研究，该研究选取了自旋密度矩阵的一个子集，包括衰变为 的 和 的 态，以及衰变为 的 态。我们识别出一个新的 介子，其质量为 MeV/，宽度为 MeV/。在我们分析所研究的末态中，我们观测到新的 仅衰变为 ，这表明其具有奇异性质。
引用
@article{arxiv.1501.05732,
title = {Observation of a new narrow axial-vector meson $a_1(1420)$},
author = {C. Adolph and R. Akhunzyanov and M. G. Alexeev and G. D. Alexeev and A. Amoroso and V. Andrieux and V. Anosov and A. Austregesilo and C. Azevedo and B. Badelek and F. Balestra and J. Barth and R. Beck and Y. Bedfer and J. Bernhard and K. Bicker and E. R. Bielert and R. Birsa and J. Bisplinghoff and M. Bodlak and M. Boer and P. Bordalo and F. Bradamante and C. Braun and A. Bressan and M. Buechele and E. Burtin and W. -C. Chang and M. Chiosso and I. Choi and S. U. Chung and A. Cicuttin and M. L. Crespo and Q. Curiel and S. Dalla Torre and S. S. Dasgupta and S. Dasgupta and O. Yu. Denisov and L. Dhara and S. V. Donskov and N. Doshita and W Duennweber and V. Duic and M. Dziewiecki and A. Efremov and P. D. Eversheim and W. Eyrich and M. Faessler and A. Ferrero and M. Finger and M. Finger and H. Fischer and C. Franco and N. du Fresne von Hohenesche and J. M. Friedrich and V. Frolov and F. Gautheron and O. P. Gavrichtchouk and S. Gerassimov and I. Gnesi and M. Gorzellik and S. Grabmueller and A. Grasso and M. Grosse-Perdekamp and B. Grube and T. Grussenmeyer and A. Guskov and F. Haas and D. Hahne and D. von Harrach and R. Hashimoto and F. H. Heinsius and F. Herrmann and F. Hinterberger and N. Horikawa and N. d'Hose and C. -Yu Hsieh and S. Huber and S. Ishimoto and A. Ivanov and Yu. Ivanshin and T. Iwata and R. Jahn and V. Jary and P. Joerg and R. Joosten and E. Kabuss and B. Ketzer and G. V. Khaustov and Yu. A. Khokhlov and Yu. Kisselev and F. Klein and K. Klimaszewski and J. H. Koivuniemi and V. N. Kolosov and K. Kondo and K. Koenigsmann and I. Konorov and V. F. Konstantinov and A. M. Kotzinian and O. Kouznetsov and M. Kraemer and P. Kremser and F. Krinner and Z. V. Kroumchtein and N. Kuchinski and F. Kunne and K. Kurek and R. P. Kurjata and A. A. Lednev and A. Lehmann and M. Levillain and S. Levorato and J. Lichtenstadt and A. Maggiora and A. Magnon and N. Makins and N. Makke and G. K. Mallot and C. Marchand and A. Martin and J. Marzec and J. Matousek and H. Matsuda and T. Matsuda and G. Meshcheryakov and W. Meyer and T. Michigami and Yu. V. Mikhailov and Y. Miyachi and A. Nagaytsev and T. Nagel and F. Nerling and D. Neyret and V. I. Nikolaenko and J. Novy and W. -D. Nowak and A. S. Nunes and A. G. Olshevsky and I. Orlov and M. Ostrick and D. Panzieri and B. Parsamyan and S. Paul and J. -C. Peng and F. Pereira and M. Pesek and D. V. Peshekhonov and S. Platchkov and J. Pochodzalla and V. A. Polyakov and J. Pretz and M. Quaresma and C. Quintans and S. Ramos and C. Regali and G. Reicherz and C. Riedl and E. Rocco and N. S. Rossiyskaya and D. I. Ryabchikov and A. Rychter and V. D. Samoylenko and A. Sandacz and C. Santos and S. Sarkar and I. A. Savin and G. Sbrizzai and P. Schiavon and K. Schmidt and H. Schmieden and K. Schoenning and S. Schopferer and T. Schlueter and A. Selyunin and O. Yu. Shevchenko and L. Silva and L. Sinha and S. Sirtl and M. Slunecka and F. Sozzi and A. Srnka and M. Stolarski and M. Sulc and H. Suzuki and A. Szabelski and T. Szameitat and P. Sznajder and S. Takekawa and J. ter Wolbeek and S. Tessaro and F. Tessarotto and F. Thibaud and V. Tskhay and S. Uhl and J. Veloso and M. Virius and S. Wallner and T. Weisrock and M. Wilfert and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and M. Ziembicki and A. Zink},
journal= {arXiv preprint arXiv:1501.05732},
year = {2016}
}
备注
8 pages, 1 figure