专属 $\omega$ 介子电产生中的横向靶自旋不对称性
高能物理 - 实验
2015-12-16 v2 高能物理 - 唯象学
摘要
本文利用 DESY 实验室的 HERMES 谱仪，通过将 27.6 GeV 正电子和电子束散射到横向极化氢靶上，研究了 介子的硬专属电产生。测量了截面相对于质子横向极化的单自旋不对称性的五个方位角调制振幅。它们是在整个运动学区域以及光子虚度和向核子动量转移的两个区间内确定的。此外，还将不对称性振幅分解为纵向和横向分量。这些结果与一个包含 极点贡献的唯象模型进行了比较。在该模型框架内，数据支持正的 跃迁形状因子。
引用
@article{arxiv.1508.07612,
title = {Transverse-target-spin asymmetry in exclusive $\omega$-meson electroproduction},
author = {The HERMES Collaboration and A. Airapetian and N. Akopov and Z. Akopov and E. C. Aschenauer and W. Augustyniak and A. Avetissian and S. Belostotski and H. P. Blok and A. Borissov and V. Bryzgalov and G. P. Capitani and G. Ciullo and M. Contalbrigo and P. F. Dalpiaz and W. Deconinck and R. De Leo and E. De Sanctis and M. Diefenthaler and P. Di Nezza and M. Düren and G. Elbakian and F. Ellinghaus and L. Felawka and S. Frullani and D. Gabbert and G. Gapienko and V. Gapienko and V. Gharibyan and F. Giordano and S. Gliske and D. Hasch and M. Hoek and Y. Holler and A. Ivanilov and H. E. Jackson and S. Joosten and R. Kaiser and G. Karyan and T. Keri and E. Kinney and A. Kisselev and V. Korotkov and V. Kozlov and V. G. Krivokhijine and L. Lagamba and L. Lapikás and I. Lehmann and P. Lenisa and W. Lorenzon and B. -Q. Ma and S. I. Manaenkov and Y. Mao and B. Marianski and H. Marukyan and Y. Miyachi and A. Movsisyan and V. Muccifora and Y. Naryshkin and A. Nass and M. Negodaev and W. -D. Nowak and L. L. Pappalardo and R. Perez-Benito and A. Petrosyan and P. E. Reimer and A. R. Reolon and C. Riedl and K. Rith and G. Rosner and A. Rostomyan and J. Rubin and D. Ryckbosch and Y. Salomatin and G. Schnell and B. Seitz and T. -A. Shibata and M. Statera and E. Steffens and J. J. M. Steijger and F. Stinzing and S. Taroian and A. Terkulov and R. Truty and A. Trzcinski and M. Tytgat and Y. Van Haarlem and C. Van Hulse and V. Vikhrov and I. Vilardi and C. Vogel and S. Wang and S. Yaschenko and S. Yen and B. Zihlmann and P. Zupranski},
journal= {arXiv preprint arXiv:1508.07612},
year = {2015}
}
备注
DESY Report 15-149