Effective field theory of Stückelberg vector bosons
Effective field theory of Stückelberg vector bosons
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Stückelberg矢量玻色子的有效场论
DOI:
10.1103/physrevd.106.055020
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发表时间:
2022
影响因子:
5
通讯作者:
Martin, Adam
中科院分区:
文献类型:
--
作者:
Kribs, Graham D.;Lee, Gabriel;Martin, Adam
We explore the effective field theory of a vector fieldthat has a Stückelberg mass. The absence of a gauge symmetry forimplies Lorentz-invariant operators are constructed directly from. Beyond the kinetic and mass terms, allowed interactions at the renormalizable level include,, and, whereis a global current of the SM or of a hidden sector. We show that all of these interactions lead to scattering amplitudes that grow with powers of, except for the case ofwhereis anonanomalousglobal current. The latter is well known whenis identified as a dark photon coupled to the electromagnetic current, often written equivalently as kinetic mixing betweenand the photon. The power counting for the energy growth of the scattering amplitudes is facilitated by isolating the longitudinal enhancement. We examine in detail the interaction with ananomalousglobal vector current, carefully isolating the finite contribution to the fermion triangle diagram. We calculate the longitudinally-enhanced observables(when),, andwhencouples to the baryon number current. Introducing a “fake” gauge-invariance by writing, the would-be gauge anomaly associated withis canceled by; this is the four-dimensional Green-Schwarz anomaly-cancellation mechanism at work. Our analysis demonstrates there is a much larger set of possible interactions that an EFT with a Stückelberg vector field can have, revealing scattering amplitudes that grow with energy. The growth of these amplitudes can be tamed by a dark Higgs sector, but this requires dark Higgs boson interactions (and reintroduces fine-tuning in the dark Higgs sector) that can be separated frominteractions only in the limit.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
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通讯作者:
J. Wells
影响因子:
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DOI:
10.1088/1475-7516/2019/04/015
发表时间:
2019-04-01
影响因子:
6.4
作者:
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通讯作者:
Vega-Morales, Roberto
影响因子:
4.4
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