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Possible compensation of the QCD vacuum contribution to the dark energy

Pasechnik, Roman LU ; Beylin, Vitaly and Vereshkov, Grigory (2013) In Physical Review D (Particles, Fields, Gravitation and Cosmology) 88(2).
Abstract
We suggest one of the possible ways to compensate the large negative quantum-topological QCD contribution to the vacuum energy density of the Universe by means of a positive constant contribution from a cosmological Yang-Mills field. An important role of the exact particular solution for the Yang-Mills field corresponding to the finite-time instantons is discussed. An interesting connection of the compensation mechanism to the color confinement in the framework of instanton models has been pointed out. Besides the Lambda(QCD) scale, this proposal relies on one dimensionless normalization constant which cannot be fixed by the perturbative QCD theory, and thus should be fine-tuned for the exact compensation to hold.
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D (Particles, Fields, Gravitation and Cosmology)
volume
88
issue
2
article number
023509
publisher
American Physical Society
external identifiers
  • wos:000321672300005
  • scopus:84881230247
ISSN
1550-2368
DOI
10.1103/PhysRevD.88.023509
language
English
LU publication?
yes
id
94925161-3355-477e-87b3-1eddfceda592 (old id 3973974)
date added to LUP
2016-04-01 10:13:27
date last changed
2024-01-06 10:56:46
@article{94925161-3355-477e-87b3-1eddfceda592,
  abstract     = {{We suggest one of the possible ways to compensate the large negative quantum-topological QCD contribution to the vacuum energy density of the Universe by means of a positive constant contribution from a cosmological Yang-Mills field. An important role of the exact particular solution for the Yang-Mills field corresponding to the finite-time instantons is discussed. An interesting connection of the compensation mechanism to the color confinement in the framework of instanton models has been pointed out. Besides the Lambda(QCD) scale, this proposal relies on one dimensionless normalization constant which cannot be fixed by the perturbative QCD theory, and thus should be fine-tuned for the exact compensation to hold.}},
  author       = {{Pasechnik, Roman and Beylin, Vitaly and Vereshkov, Grigory}},
  issn         = {{1550-2368}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D (Particles, Fields, Gravitation and Cosmology)}},
  title        = {{Possible compensation of the QCD vacuum contribution to the dark energy}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.88.023509}},
  doi          = {{10.1103/PhysRevD.88.023509}},
  volume       = {{88}},
  year         = {{2013}},
}