Similarity and Differences between the Radion and Higgs Boson Production and Decay Processes Involving Off-Shell Fermions

被引：0
|
作者：
Boos, E. E. [1 ]
Keizerov, S. I. [1 ]
Rahmetov, E. R. [1 ]
Svirina, K. S. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2015年 / 78卷 / 13期
基金：
俄罗斯科学基金会;
关键词：
radion; Higgs boson; Randall-Sundrum model;
D O I：
10.1134/S1063778815130050
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The radion is a scalar particle that occurs in brane world models and interacts with the trace of the energy-momentum tensor of the Standard Model (SM). The radion-SM fermion interaction Lagrangian differs from the Higgs boson-fermion interaction Lagrangian for off-shell fermions. It is shown that all additional, as compared to the Higgs boson, contributions to the amplitudes of radion production and decay processes involving off-shell fermions are canceled out for both massless and massive fermions. Thus, additional terms in the interaction Lagrangian do not change properties of these processes for the radion and the Higgs boson, except for the general normalization factors. This similarity is a consequence of gauge invariance for the processes with production of gauge bosons. When an additional scalar particle is produced, there are no apparent reasons for the above cancellation, as confirmed, for example, by the process with production of two scalar particles, which features an additional contribution of the radion in comparison with the Higgs boson.
引用
收藏
页码：1484 / 1488
页数：5
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