HERMES 实验中的五夸克态 $\Theta^+$ 搜寻
高能物理 - 实验
2015-04-28 v2
摘要
此前 HERMES 实验对准实光生过程中激发并通过 道衰变的窄重子态的搜寻，已通过改进衰变粒子重建、更先进的粒子识别以及增加事例样本得到了扩展。早期在 1528 MeV 不变质量处观测到的结构移至 1522 MeV，且对于氘靶数据，其统计显著性降至约 2。背景以上的事例数为 。在氢数据集中未观测到此类结构。
引用
@article{arxiv.1412.7317,
title = {Pentaquark $\Theta^+$ search at HERMES},
author = {The HERMES Collaboration and N. Akopov and Z. Akopov and W. Augustyniak and R. Avakian and A. Avetissian and E. Avetisyan and S. Belostotski and H. P. Blok and A. Borissov and J. Bowles and V. Bryzgalov and J. Burns and G. P. Capitani and E. Cisbani and G. Ciullo and M. Contalbrigo and P. F. Dalpiaz and W. Deconinck and R. De Leo and E. De Sanctis and P. Di Nezza and G. Elbakian and E. Etzelmüller and R. Fabbri and A. Fantoni and L. Felawka and S. Frullani and D. Gabbert and J. Garay García and F. Garibaldi and G. Gavrilov and F. Giordano and S. Gliske and M. Hartig and D. Hasch and Y. Holler and I. Hristova and Y. Imazu 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. Kozlov and P. Kravchenko and V. G. Krivokhijine and L. Lagamba and L. Lapikás and I. Lehmann and A. López Ruiz and W. Lorenzon and X. Lu and B. -Q. Ma and D. Mahon and S. I. Manaenkov and Y. Mao and B. Marianski and A. Martinez de la Ossa and H. Marukyan and C. A. Miller and Y. Miyachi and A. Movsisyan and M. Murray and E. Nappi 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 K. P. Schüler and B. Seitz and T. -A. Shibata and M. Stancari and J. J. M. Steijger and S. Taroian and A. Terkulov and R. Truty and A. Trzcinski and M. Tytgat and Y. Van Haarlem and C. Van Hulse and D. Veretennikov and V. Vikhrov and I. Vilardi and S. Wang and S. Yaschenko and H. Ye and Z. Ye and S. Yen and B. Zihlmann and P. Zupranski},
journal= {arXiv preprint arXiv:1412.7317},
year = {2015}
}