QCD and relativistic O(αsv2) corrections to hadronic decays of spin-singlet heavy quarkonia hc, hb and ηb

被引：12
作者：
Li, Jin-Zhao [1 ,2 ]
Ma, Yan-Qing [3 ]
Chao, Kuang-Ta [1 ,2 ,4 ]
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] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[4] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW D | 2013年 / 88卷 / 03期
基金：
中国国家自然科学基金;
关键词：
PARTON DISTRIBUTIONS; P-1(1) STATE; CHARMONIUM;
D O I：
10.1103/PhysRevD.88.034002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the annihilation decay widths of spin-singlet heavy quarkonia h(c), h(b) and eta(b) into light hadrons with both QCD and relativistic corrections at order O(alpha(s)v(2)) in nonrelativistic QCD. With appropriate estimates for the long-distance matrix elements by using the potential model and operator evolution method, we find that our predictions of these decay widths are consistent with recent experimental measurements. We also find that the O(alpha(s)v(2)) corrections are small for b (b) over bar states but substantial for c (c) over bar states. In particular, the negative contribution of O(alpha(s)v(2)) correction to the h(c) decay can lower the decay width, as compared with previous predictions without the O(alpha(s)v(2)) correction, and thus result in a good agreement with the recent BESIII measurement.
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页数：15
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