首次测量包含性 B → X_s η 衰变
高能物理 - 实验
2010-11-11 v2
摘要
我们报告了包含性 B → X_s η 衰变的首次测量，其中 X_s 是奇异数为 1 的无粲态。该测量基于一种赝包含性重建技术，并使用了在 KEKB e^+e^- 对撞机上由 Belle 探测器积累的 657 × 10^6 个 BB-bar 对样本。对于 M_{X_s} < 2.6 GeV/c^2，我们测得分支比为 (26.1 ± 3.0 (统计) +1.9 -2.1 (系统) +4.0 -7.1 (模型)) × 10^-5，直接 CP 不对称性为 A_{CP} = -0.13 ± 0.04 +0.02 -0.03。超过一半的信号出现在 M_{X_s} > 1.8 GeV/c^2 的范围内。
引用
@article{arxiv.0910.4751,
title = {First Measurement of Inclusive B -> X_s eta Decays},
author = {Belle Collaboration and K. Nishimura and T. E. Browder and I. Adachi and H. Aihara and K. Arinstein and T. Aushev and A. M. Bakich and V. Balagura and E. Barberio and K. Belous and V. Bhardwaj and M. Bischofberger and A. Bondar and A. Bozek and M. Bracko and M. -C. Chang and Y. Chao and A. Chen and K. -F. Chen and P. Chen and B. G. Cheon and C. -C. Chiang and I. -S. Cho and Y. Choi and J. Dalseno and M. Danilov and Z. Dolezal and A. Drutskoy and S. Eidelman and N. Gabyshev and B. Golob and H. Ha and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and Y. Horii and Y. Hoshi and W. -S. Hou and H. J. Hyun and T. Iijima and K. Inami and R. Itoh and M. Iwabuchi and Y. Iwasaki and N. J. Joshi and T. Julius and J. H. Kang and P. Kapusta and H. Kawai and T. Kawasaki and H. Kichimi and C. Kiesling and H. J. Kim and H. O. Kim and M. J. Kim and Y. J. Kim and K. Kinoshita and B. R. Ko and P. Kodys and S. Korpar and P. Krizan and T. Kumita and A. Kuzmin and Y. -J. Kwon and S. -H. Kyeong and J. S. Lange and M. J. Lee and S. -H. Lee and J. Li and C. Liu and Y. Liu and D. Liventsev and R. Louvot and A. Matyja and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and G. B. Mohanty and T. Mori and E. Nakano and M. Nakao and Z. Natkaniec and S. Nishida and S. Ogawa and T. Ohshima and S. L. Olsen and W. Ostrowicz and G. Pakhlova and C. W. Park and H. Park and H. K. Park and K. S. Park and R. Pestotnik and M. Petric and L. E. Piilonen and M. Rohrken and S. Ryu and H. Sahoo and Y. Sakai and O. Schneider and C. Schwanda and A. J. Schwartz and K. Senyo and O. Seon and M. E. Sevior and M. Shapkin and C. P. Shen and J. -G. Shiu and F. Simon and P. Smerkol and A. Sokolov and E. Solovieva and M. Staric and T. Sumiyoshi and S. Suzuki and Y. Teramoto and K. Trabelsi and S. Uehara and T. Uglov and Y. Unno and S. Uno and G. Varner and K. E. Varvell and K. Vervink and C. H. Wang and M. -Z. Wang and P. Wang and Y. Watanabe and J. Wicht and K. M. Williams and E. Won and Y. Yamashita and M. Yamauchi and C. C. Zhang and Z. P. Zhang and P. Zhou and V. Zhulanov and T. Zivko and A. Zupanc and O. Zyukova},
journal= {arXiv preprint arXiv:0910.4751},
year = {2010}
}
备注
6 pages, 1 figure, 1 table, submitted to Physical Review Letters