Color unified dynamical axion
Color unified dynamical axion
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DOI:
10.1140/epjc/s10052-018-6396-6
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
del Rey, R.
中科院分区:
文献类型:
--
作者:
Gaillard, M. K.;Gavela, M. B.;Houtz, R.;Quilez, P.;del Rey, R.
We consider an enlarged color sector which solves the strong CP problem via new massless fermions. The spontaneous breaking of a unified color group into QCD and another confining group provides a source of naturally large axion massdue to small size instantons. This extra source of axion mass respects automatically the alignment of the vacuum, ensuring a low-energy CP-conserving vacuum. The mechanism does not appeal to a“mirror” copy of the SM, nor does it require any fine-tuning of the axion-related couplings at the unification scale. There is no very light axion and uncharacteristically the lighter spectrum contains instead sterile fermions. The axion scalecan be naturally brought down to a few TeV, with an exotic spectrum of colored pseudoscalars lighter than this scale, observable at colliders exclusively via strong interactions. Theparameter space which allows a solution of the strong CP problem is thus enlarged well beyond that of invisible axion models.
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DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
S. Hsu;Francesco Sannino
通讯作者:
Francesco Sannino
影响因子:
5.4
作者:
R. Alonso;A. Urbano
通讯作者:
A. Urbano
影响因子:
4.4
作者:
D. Butter;M. Gaillard
通讯作者:
M. Gaillard
影响因子:
8.6
作者:
A. Hook
通讯作者:
A. Hook
DOI:
--
发表时间:
2004
期刊:
Phys.Rev.Lett. 93
影响因子:
--
作者:
T.Alexopoulos et al.
通讯作者:
T.Alexopoulos et al.