\psi(3770) 参数的测量
高能物理 - 实验
2012-04-30 v2
摘要
我们报告了利用 VEPP-4M 正负电子对撞机上的 KEDR 探测器收集的数据样本对 \psi(3770) 介子研究的最终结果。数据分析考虑了共振态与非共振态 产生之间的干涉，其中后者与能量依赖形状因子 的非共振部分相关。对于非共振 ，尝试了矢量主导方法和几种经验参数化。我们得到的 \psi(3770) 质量和总宽度结果为 M = 3779.2 ^{+1.8}_{-1.7} ^{+0.5}_{-0.7} ^{+0.3}_{-0.3} MeV, \Gamma =24.9 ^{+4.6}_{-4.0} ^{+0.5}_{-0.6} ^{+0.2}_{-0.9} MeV，其中第一、第二和第三个不确定度分别为统计、系统和模型不确定度。对于电子部分宽度，发现了两种可能的解：(1) \Gamma_{ee} = 154 ^{+79}_{-58} ^{+17}_{-9} ^{+13}_{-25} eV，(2) \Gamma_{ee} = 414 ^{+72}_{-80} ^{+24}_{-26} ^{+90}_{-10} eV。我们的统计数据不足以偏好其中一种解。解 (2) 缓解了非- 衰变的问题，但不受势模型青睐。研究表明，在阈值附近区域考虑共振态 - 连续谱干涉会影响共振态参数，因此所呈现的结果不能直接与忽略此效应获得的相应 PDG 值进行比较。
引用
@article{arxiv.1109.4205,
title = {Measurement of \psi(3770) parameters},
author = {V. V. Anashin and V. M. Aulchenko and E. M. Baldin and A. K. Barladyan and A. Yu. Barnyakov and M. Yu. Barnyakov and S. E. Baru and I. Yu. Basok and O. L. Beloborodova and A. E. Blinov and V. E. Blinov and A. V. Bobrov and V. S. Bobrovnikov and A. V. Bogomyagkov and A. E. Bondar and A. R. Buzykaev and S. I. Eidelman and D. N. Grigoriev and Yu. M. Glukhovchenko and V. V. Gulevich and D. V. Gusev and S. E. Karnaev and G. V. Karpov and S. V. Karpov and T. A. Kharlamova and V. A. Kiselev and V. V. Kolmogorov and S. A. Kononov and K. Yu. Kotov and E. A. Kravchenko and V. N. Kudryavtsev and V. F. Kulikov and G. Ya. Kurkin and E. A. Kuper and E. B. Levichev and D. A. Maksimov and V. M. Malyshev and A. L. Maslennikov and A. S. Medvedko and O. I. Meshkov and S. I. Mishnev and I. I. Morozov and N. Yu. Muchnoi and V. V. Neufeld and S. A. Nikitin and I. B. Nikolaev and I. N. Okunev and A. P. Onuchin and S. B. Oreshkin and I. O. Orlov and A. A. Osipov and S. V. Peleganchuk and S. G. Pivovarov and P. A. Piminov and V. V. Petrov and A. O. Poluektov and V. G. Prisekin and A. A. Ruban and V. K. Sandyrev and G. A. Savinov and A. G. Shamov and D. N. Shatilov and B. A. Shwartz and E. A. Simonov and S. V. Sinyatkin and A. N. Skrinsky and V. V. Smaluk and A. V. Sokolov and A. M. Sukharev and E. V. Starostina and A. A. Talyshev and V. A. Tayursky and V. I. Telnov and Yu. A. Tikhonov and K. Yu. Todyshev and G. M. Tumaikin and Yu. V. Usov and A. I. Vorobiov and A. N. Yushkov and V. N. Zhilich and V. V. Zhulanov and A. N. Zhuravlev},
journal= {arXiv preprint arXiv:1109.4205},
year = {2012}
}