Oblique corrections to the W width.
Oblique corrections to the W width.
复制标题
W 宽度的倾斜修正。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Takeuchi
中科院分区：
文献类型：
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作者：
J. Rosner;M. Worah;T. Takeuchi
部分$W$Width to$e的最低阶表达式
U，~Gamma(W o e
U)=G_muM_W^3/(6pi_Sqrt{2})$，如果使用测量的$W$质量，则没有来自新物理的倾斜辐射修正。这里$G_MU=(1.16639 PM 0.00002)imes 10^{-5}$GeV/$c^2$是介子衰变常数。对于现值$M_W=(80.14 PM 0.27)$GeV/$c^2$，如果$m_t=140$GeV$/c^2$，则预期为$Gamma(W o e
U)=(224.4 PM 2.3)$MeV总宽度$Gamma_{
Mtot}(W)$预计也没有来自新物理的倾斜修正，因此$Gamma_{
M Tot}(W)/Gamma(W o e
U)=3+6[1+{α_S(M_W)/pi}]$。目前的数据与这一预测一致。
The lowest-order expression for the partial $W$ width to $e
u ,~Gamma (W o e
u) = G_mu M_W^3 /(6 pi sqrt{2})$, has no oblique radiative corrections from new physics if the measured $W$ mass is used. Here $G_mu = (1.16639 pm 0.00002) imes 10^{-5}$ GeV/$c^2$ is the muon decay constant. For the present value of $M_W = (80.14 pm 0.27)$ GeV/$c^2$, and with $m_t = 140$ GeV$/c^2$, one expects $Gamma (W o e
u) = (224.4 pm 2.3)$ MeV. The total width $Gamma_{
m tot}(W)$ is also expected to lack oblique corrections from new physics, so that $Gamma_{
m tot} (W)/ Gamma (W o e
u) = 3 + 6 [1 + {alpha_s (M_W)/pi }]$. Present data are consistent with this prediction.