منابع مشابه
Axion and Almost Massless Quark as Ingredients of Quintessence
It is pointed out that a natural introduction of quintessence is an axion with an almost massless quark. With an appropriate gauge or discrete symmetry, one can obtain the quintessence potential height of order (0.003 eV). Even though the QCD axion with almost massless up quark is a possibility, we stress the almost massless quark in the hidden sector together with the QCD axion toward the quin...
متن کاملQuintessence Axion Potential Induced by Electroweak Instanton Effects
Recent cosmological observations suggest the presence of small but nonzero cosmological constant Λcos ≃ (2 × 10−3 eV)4. It is an intriguing possibility that such a small cosmological constant is supplied by the potential energy density of an ultralight axion-like field (called as quintessence axion). If this axion couples to the electroweak gauge fields, its potential may be generated by the el...
متن کاملQuintessence, Flat Potential and String/M Theory Axion
A slow-rolling scalar field (Quintessence) has been proposed as the origin of accelerating universe at present. We discuss some features of quintessence, particularly those related with the flatness of its potential. We distinguish two types of quintessences, a metrical quintessence which couples to the particle physics sector only through the mixing with the spacetime metric and a non-metrical...
متن کاملSNUTP 99-037, KIAS-P99061 Model-dependent Axion as Quintessence with Almost Massless Hidden Sector Quarks
A pseudo-Goldstone boson for quintessence is known to require the decay constant Fq ∼ MP and the height of the potential (0.003 eV)4, and hence the pseudo-Goldstone boson mass of order 10−33 eV. The modeldependent axion in some superstring models is suggested as a good candidate for the quintessence. We realize this idea with a hidden-sector gauge group SU(3)H × U(1)H . The hidden-sector instan...
متن کاملModel-dependent Axion as Quintessence with Almost Massless Hidden Sector Quarks
A pseudo-Goldstone boson for quintessence is known to require the decay constant Fq ∼ MP and the height of the potential (0.003 eV) 4, and hence the pseudo-Goldstone boson mass of order 10−33 eV. The modeldependent axion in some superstring models is suggested as a good candidate for the quintessence. We realize this idea with a hidden-sector gauge group SU(3)H × U(1)H . The hidden-sector insta...
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ژورنال
عنوان ژورنال: Advances in Mathematical Physics
سال: 2012
ISSN: 1687-9120,1687-9139
DOI: 10.1155/2012/368121