期刊
MODERN PHYSICS LETTERS A
卷 31, 期 30, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732316300329
关键词
QCD; strong coupling; tau decays
资金
- Mainz Institute for Theoretical Physics (MITP)
- Spanish Government
- ERDF funds from the EU Commission [FPA2014-53631-C2-1-P, FPU14/02990]
- Spanish Centro de Excelencia Severo Ochoa Programme [SEV-2014-0398]
- Generalitat Valenciana [PrometeoII/2013/007]
Using the most recent release of the ALEPH tau decay data, we present a very detailed phenomenological update of the alpha(s)(m(tau)(2)) determination. We have exploited the sensitivity to the strong coupling in many different ways, exploring several complementary methodologies. All determinations turn out to be in excellent agreement, allowing us to extract a very reliable value of the strong coupling. We find alpha((nf =3))(s)(m(tau)(2)) = 0.328 +/- 0.012 which implies alpha((nf=5))(s)(M-Z(2)) = 0.1197 +/- 0.0014. We critically revise previous work, and point out the problems flawing some recent analyses which claim slightly smaller values.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据