Roman Pasechnik
Senior lecturer
Possible compensation of the QCD vacuum contribution to the dark energy
Author
Summary, in English
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.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2013
Language
English
Publication/Series
Physical Review D (Particles, Fields, Gravitation and Cosmology)
Volume
88
Issue
2
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Status
Published
ISBN/ISSN/Other
- ISSN: 1550-2368