ηc production associated with light hadrons at the B-factories and the future Super B-factories

被引：0

作者：

Gong, Qin-Rong ^{[1
,2
]}

Sun, Zhan ^{[3
]}

Zhang, Hong-Fei ^{[4
]}

Mo, Xue-Mei ^{[5
]}

机构：

[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[3] Guizhou Minzu Univ, Sch Sci, Guiyang 550025, Peoples R China

[4] Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China

[5] Third Mil Med Univ, Sch Biomed Engn, Inst Digital Med, Chongqing 400038, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 09期

基金：

中国国家自然科学基金;

关键词：

J/PSI;

D O I：

10.1140/epjc/s10052-016-4360-x

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present a complete study of the associated production of the eta(c) meson with light hadrons in e(+)e(-) collisions at the B-factory energy, which is demonstrated to be one of the best laboratories for testing the colour-octet (CO) mechanism. The colour-singlet contributions are evaluated up to O(alpha(2)alpha(3)(S)), while the CO ones are evaluated up to O(alpha(2)alpha(2)(S)). For the first time, the angular distribution of the S-1(0)[8] production is studied at QCD next-to-leading order. We find that the S-1(0)[8] channel dominates the total cross section, while the P-1(1)[8] one exhibits its importance in the angular distribution, which turns out to be downward going with respect to cos theta. This can be considered as the most distinct signal for the CO mechanism.

引用

页数：8

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