IR/UV mixing from local similarity maps of scalar non-Hermitian field theories
IR/UV mixing from local similarity maps of scalar non-Hermitian field theories
复制标题
来自标量非厄米场论的局部相似图的红外/紫外混合
DOI:
10.1103/physrevd.105.076020
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发表时间:
2022
影响因子:
5
通讯作者:
Chernodub M
中科院分区:
文献类型:
--
作者:
Chernodub M
We propose to “gauge” the group of similarity transformations that acts on a space of non-Hermitian scalar theories. We introduce the “similarity gauge field,” which acts as a gauge connection on the space of non-Hermitian theories characterized by (and equivalent to a Hermitian) real-valued mass spectrum. This extension leads to new effects: if the mass matrix is not the same in distant regions of space, but its eigenvalues coincide pairwise in both regions, the particle masses stay constant in the whole spacetime, making the model indistinguishable from a standard, low-energy, and scalar Hermitian one. However, contrary to the Hermitian case, the high-energy scalar particles become unstable at a particular wavelength determined by the strength of the emergent similarity gauge field. This instability corresponds to momentum-dependent exceptional points, whose locations cannot be identified from an analysis of the eigenvalues of the coordinate-dependent squared-mass matrix in isolation, as one might naively have expected. For a doublet of scalar particles with masses of the order of 1 MeV and a similarity gauge rotation of order unity at distances of 1 meter, the corrections to the masses are about, which makes no experimentally detectable imprint on the low-energy spectrum. However, the instability occurs at, suggestively in the energy range of detectable ultra-high-energy cosmic rays, thereby making this truly non-Hermitian effect and its generalizations of phenomenological interest for high-energy particle physics.
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DOI:
10.1088/1751-8121/aac035
发表时间:
2015
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
P. Mannheim
通讯作者:
P. Mannheim
影响因子:
5
作者:
P. Mannheim
通讯作者:
P. Mannheim
DOI:
10.1140/epjp/s13360-022-02889-z
发表时间:
2020
期刊:
The European Physical Journal Plus
影响因子:
--
作者:
A. Fring;Takanobu Taira
通讯作者:
Takanobu Taira
影响因子:
5
作者:
J. Alexandre;J. Ellis;P. Millington;D. Seynaeve
通讯作者:
D. Seynaeve
影响因子:
5
作者:
P. Mannheim
通讯作者:
P. Mannheim