用KEDR探测器测量J/ψ轻子宽度
高能物理 - 实验
2011-10-04 v1
摘要
我们报告了在VEPP-4M e+e-对撞机上用KEDR探测器对J/ψ介子轻子宽度的新精确测定。测得的J/ψ参数值为：Γee×Γee/Γ = 0.3323 ± 0.0064 (统计) ± 0.0048 (系统) keV，Γee×Γμμ/Γ = 0.3318 ± 0.0052 (统计) ± 0.0063 (系统) keV。假设eμ普适性并利用分支比的表列值，得到轻子宽度Γll = 5.59 ± 0.12 keV和总宽度Γ = 94.1 ± 2.7 keV。我们还详细讨论了在窄共振处计算辐射修正的方法。
关键词
引用
@article{arxiv.1110.0328,
title = {Measurement of J/psi leptonic width with the KEDR detector},
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:1110.0328},
year = {2011}
}
备注
Published in proceedings of the PhiPsi 2009 conference