Heavy quark (q)over-barq matrix elements in the nucleon from perturbative QCD -: art. no. 094028

被引：20
|
作者：
Kryjevski, A [1 ]
机构：
[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA
来源：
PHYSICAL REVIEW D | 2004年 / 70卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.70.094028
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The scalar heavy quark content of the nucleon, M-q=<N|m(q)(q) over barq|N>, is relevant for computing the interaction of dark matter candidates with ordinary matter, while M-s is important for predicting the properties of dense matter. We compute M-q in perturbative QCD to O(alpha(3)). As one goes from M-t to M-c the leading order contribution decreases as the number of light quarks is dropping, while the radiative corrections grow and are all positive. The leading source of uncertainty in the calculation is due to the poorly known value of M-s. The Higgs-nucleon coupling is estimated to be g(hNN)similar or equal to1.7x10(-3).
引用
收藏
页码：094028 / 1
页数：4
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