Possible compensation of the QCD vacuum contribution to the dark energy
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3973974
- author
- Pasechnik, Roman LU ; Beylin, Vitaly and Vereshkov, Grigory
- organization
- publishing date
- 2013
- 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}}, }