MG15 - Talk detail |
|
Participant |
de la Macorra, Axel | |||||||
|
Institution |
Physics Institute, UNAM - Circuito de la Investigación Científica, Ciudad Universitaria - Mexico - CDMX - Mexico | |||||||
|
Session |
DE1 |
Accepted |
Yes |
Order |
3 |
Time |
16:15 | 10' |
|
Talk |
Oral abstract |
Title |
Bound dark energy, towards understanding and testing the nature of dark energy | |||||
| Coauthors | Almaraz, Erick | |||||||
|
Abstract |
We present a Dark Energy (DE) model with a sound derivation as a natural extension of the Standard Model of particle physics with no free parameters and an excellent fit with current cosmological data improving by 21% the ΛCDM fit of theBaryon Acoustic Oscillations (BAO) measurements, specially designed to determine the dynamics of DE. DE corresponds to the lightest bound state scalar particle φ with a potential V = Λc^(4+2/3) φ^(-2/3) dynamically formed at the condensation energy scale Λc and scale factor ac. The value of Λc, the exponent n = 2/3, and the initial conditions of φ are all derived quantities. We obtain an exact constraint ac Λc /eV = 1.0939 × 10^(−4) and a theoretical prediction Λc = 34 (+/- 11) eV, consistent with the best fitΛc =44.08±0.27eV. We test our model prediction on acΛc by allowing ac andΛc to vary independently and remarkably our prediction has a relative difference of only 0.2% with the best fit value. Unlike a cosmological constant Λ, our DE model predicts the amount of DE and leaves detectable cosmological imprints at different times and scales at a background and perturbation level. |
|||||||
Pdf file |
||||||||