半轻子 $B^-\to p\bar p\ell^-\bar\nu_\ell$ 衰变的证据
高能物理 - 实验
2014-01-15 v2
摘要
基于在 KEKB 非对称能量电子 - 正电子对撞机的 共振处利用 Belle 探测器收集的 7.72 亿对 数据样本，我们发现了半轻子重子衰变 （）的证据。本研究使用了基于神经网络的强子 介子标记方法。假设轻子普适性，测得 的分支比为 ，显著性为 3.2。我们还估计了相应的上限：在 90% 置信水平下 。这一测量有助于约束 B 衰变中的重子跃迁形状因子。
引用
@article{arxiv.1306.3353,
title = {Evidence for Semileptonic B- to p pbar l nubar Decays},
author = {K. -J. Tien and M. -Z. Wang and I. Adachi and H. Aihara and D. M. Asner and V. Aulchenko and T. Aushev and A. M. Bakich and A. Bala and B. Bhuyan and A. Bozek and M. Bračko and T. E. Browder and P. Chang and V. Chekelian and A. Chen and P. Chen and B. G. Cheon and K. Chilikin and R. Chistov and I. -S. Cho and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Doležal and Z. Drásal and D. Dutta and S. Eidelman and H. Farhat and J. E. Fast and T. Ferber and V. Gaur and S. Ganguly and R. Gillard and Y. M. Goh and B. Golob and J. Haba and H. Hayashii and Y. Horii and Y. Hoshi and W. -S. Hou and Y. B. Hsiung and M. Huschle and H. J. Hyun and T. Iijima and A. Ishikawa and R. Itoh and Y. Iwasaki and T. Julius and D. H. Kah and J. H. Kang and E. Kato and T. Kawasaki and H. Kichimi and C. Kiesling and D. Y. Kim and H. J. Kim and J. B. Kim and J. H. Kim and Y. J. Kim and J. Klucar and B. R. Ko and P. Kodyš and S. Korpar and P. Križan and P. Krokovny and B. Kronenbitter and T. Kuhr and T. Kumita and A. Kuzmin and Y. -J. Kwon and S. -H. Lee and J. Li and Y. Li and J. Libby and C. Liu and Y. Liu and D. Liventsev and P. Lukin and K. Miyabayashi and H. Miyata and G. B. Mohanty and A. Moll and R. Mussa and E. Nakano and M. Nakao and Z. Natkaniec and M. Nayak and E. Nedelkovska and C. Ng and N. K. Nisar and S. Nishida and O. Nitoh and S. Ogawa and S. Okuno and S. L. Olsen and W. Ostrowicz and C. Oswald and C. W. Park and H. Park and H. K. Park and T. K. Pedlar and R. Pestotnik and M. Petrič and L. E. Piilonen and M. Ritter and M. Röhrken and A. Rostomyan and H. Sahoo and T. Saito and Y. Sakai and S. Sandilya and D. Santel and L. Santelj and T. Sanuki and Y. Sato and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and D. Semmler and K. Senyo and O. Seon and M. E. Sevior and M. Shapkin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and A. Sibidanov and Y. -S. Sohn and A. Sokolov and S. Stanič and M. Starič and M. Steder and M. Sumihama and T. Sumiyoshi and K. Tanida and G. Tatishvili and Y. Teramoto and M. Uchida and S. Uehara and T. Uglov and Y. Unno and S. Uno and P. Urquijo and S. E. Vahsen and C. Van Hulse and P. Vanhoefer and G. Varner and K. E. Varvell and A. Vinokurova and V. Vorobyev and M. N. Wagner and C. H. Wang and P. Wang and M. Watanabe and Y. Watanabe and K. M. Williams and E. Won and J. Yamaoka and Y. Yamashita and S. Yashchenko and Z. P. Zhang and V. Zhilich and V. Zhulanov and A. Zupanc},
journal= {arXiv preprint arXiv:1306.3353},
year = {2014}
}
备注
12 pages, 4 figures, submitted to Phys.Rev.Lett