Report
Dispersion theoretic calculation of the $H\rightarrow Z+\gamma$ amplitude
| العنوان: | Dispersion theoretic calculation of the $H\rightarrow Z+\gamma$ amplitude |
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| المؤلفون: | Boradjiev, I., Christova, E., Eberl, H. |
| المصدر: | Phys. Rev. D 97, 073008 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | We have calculated the $W$-loop contribution to the amplitude of the decay $H\rightarrow Z+\gamma$ in two different methods: 1) in the $R_\xi$-gauge using dimensional regularization (DimReg), and 2) in the unitary gauge through the dispersion method. Using the dispersion method we have followed two approaches: i) without subtraction and ii) with subtraction, the subtraction constant being determined adopting the Goldstone boson equivalence theorem (GBET) at the limit $M_W\to 0$. The results of the calculations in $R_\xi$-gauge with DimReg and the dispersion method with the GBET completely coincide, which shows that DimReg is compatible with the dispersion method obeying the GBET. Comment: 16 pages with 15 figures, changes in Sec. IVB, references added |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.97.073008 |
| URL الوصول: | http://arxiv.org/abs/1711.07298 |
| رقم الانضمام: | edsarx.1711.07298 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.97.073008 |
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