Two-loop O( alpha sGFM2Q) heavy-quark corrections to the interactions between Higgs and intermediate bosons.
Two-loop O( alpha sGFM2Q) heavy-quark corrections to the interactions between Higgs and intermediate bosons.
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对希格斯粒子和中间玻色子之间相互作用的双环 O(alpha sGFM2Q) 重夸克校正。
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发表时间：
1996
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通讯作者：
B. Kniehl
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作者：
B. Kniehl
利用低能定理，我们分析了在O（alpha_sG_FM_Q^2）处由虚高质量夸克Q（M_Q >> M_Z，M_H，其中包括顶夸克）引起的标准模型W^+W^-H和ZZH耦合的位移。在改进的玻恩近似下，我们找到了对各种四点和五点希格斯玻色子产生和衰变过程的相应修正，这些过程涉及W^+W^-H和ZZH顶点，其中一个或两个规范玻色子分别与光费米子流相连。这包括e^+e^- -> f通过希格斯辐射，通过W^+W^-融合（f = nu_e），通过ZZ融合（f = e），以及H -> 2 V-> 4f（V = W，Z）。
By means of a low-energy theorem, we analyze at O(alpha_s G_F M_Q^2) the shifts in the Standard-Model W^+W^-H and ZZH couplings induced by virtual high-mass quarks, Q, with M_Q >> M_Z, M_H, which includes the top quark. Invoking the improved Born approximation, we then find the corresponding corrections to various four- and five-point Higgs-boson production and decay processes which involve the W^+W^-H and ZZH vertices with one or both of the gauge bosons being connected to light-fermion currents, respectively. This includes e^+e^- -> f anti-f H via Higgs-strahlung, via W^+W^- fusion (with f = nu_e), and via ZZ fusion (with f = e), as well as H -> 2V -> 4f (with V = W, Z).