Large volumes and spectroscopy of walking theories
Large volumes and spectroscopy of walking theories
复制标题
步行理论的大量和光谱
DOI:
10.1103/physrevd.93.054505
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发表时间:
2016
影响因子:
5
通讯作者:
Del Debbio L
中科院分区:
文献类型:
--
作者:
Del Debbio L
A detailed investigation of finite-size effects is performed for SU(2) gauge theory with two fermions in the adjoint representation, which previous lattice studies have shown to be inside the conformal window. The system is investigated with different spatial and temporal boundary conditions on lattices of various spatial and temporal extensions, for two values of the bare fermion mass representing aheavyandlightfermion regime. Our study shows that the infinite-volume limit of masses and decay constants in the mesonic sector is reached only when the mass of the pseudoscalar particleand the spatial lattice sizesatisfy the relation. This bound, which is at least a factor of three higher than what is observed in QCD, is a likely consequence of the different spectral signatures of the two theories, with the scalar isosinglet (glueball) being the lightest particle in our model. In addition to stressing the importance of simulating large lattice sizes, our analysis emphasizes the need to understand quantitatively thefullspectrum of the theory rather than just the spectrum in the mesonic isotriplet sector. While for the lightest fermion measuring masses from gluonic operators proves to be still challenging, reliable results for glueball states are obtained at the largest fermion mass and, in the mesonic sector, for both fermion masses. As a byproduct of our investigation, we perform a finite-size scaling of the pseudoscalar mass and decay constant. The data presented in this work support the conformal behavior of this theory with an anomalous dimension.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
K. Ishikawa;Y. Iwasaki;Y. Nakayama;T. Yoshie
通讯作者:
T. Yoshie
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
L. Anguelova
通讯作者:
L. Anguelova
影响因子:
5
作者:
T. DeGrand;A. Hasenfratz
通讯作者:
A. Hasenfratz
影响因子:
5
作者:
A. Hietanen;K. Rummukainen;Kimmo Tuominen Florida International University;U. Helsinki;U. Oulu;U. Jyvaskyla-U.-Jyv
通讯作者:
A. Hietanen;K. Rummukainen;Kimmo Tuominen Florida International University;U. Helsinki;U. Oulu;U. Jyvaskyla-U.-Jyv
影响因子:
5
作者:
L. Debbio;R. Zwicky
通讯作者:
L. Debbio;R. Zwicky