Perturbations in the relaxation mechanism for a large cosmological constant

被引：16
作者：
Bauer, Florian [1 ,2 ]
机构：
[1] Univ Barcelona, High Energy Phys Grp, Dept ECM, E-08028 Barcelona, Spain
[2] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Spain
来源：
CLASSICAL AND QUANTUM GRAVITY | 2010年 / 27卷 / 05期
关键词：
HUBBLE-SPACE-TELESCOPE; DARK ENERGY; GRAVITY; CONSTRAINTS;
D O I：
10.1088/0264-9381/27/5/055001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Recently, a mechanism for relaxing a large cosmological constant (CC) has been proposed by Bauer et al (2009 Phys. Lett. B 678 427), which permits solutions with low Hubble rates at late times without fine-tuning. The setup is implemented in the Lambda XCDM framework, and we found a reasonable cosmological background evolution similar to the Lambda CDM model with a fine-tuned CC. In this work, we analyse analytically the perturbations in this relaxation model, and we show that their evolution is also similar to the Lambda CDM model, especially in the matter era. Some tracking properties of the vacuum energy are discussed, too.
引用
收藏
页数：18
相关论文
共 48 条
[1]   Renormalization-group running cosmologies: A scale-setting procedure [J].
Babic, A ;
Guberina, B ;
Horvat, R ;
Stefancic, H .
PHYSICAL REVIEW D, 2005, 71 (12)
[2]   Renormalization-group running of the cosmological constant and its implication for the Higgs boson mass in the standard model [J].
Babic, A ;
Guberina, B ;
Horvat, R ;
Stefancic, H .
PHYSICAL REVIEW D, 2002, 65 (08) :850021-850026
[3]   Classical cancellation of the cosmological constant reconsidered [J].
Barr, SM ;
Ng, SP ;
Scherrer, RJ .
PHYSICAL REVIEW D, 2006, 73 (06)
[4]   ATTEMPT AT A CLASSICAL CANCELLATION OF THE COSMOLOGICAL CONSTANT [J].
BARR, SM .
PHYSICAL REVIEW D, 1987, 36 (06) :1691-1700
[5]   Hubble expansion and structure formation in time varying vacuum models [J].
Basilakos, Spyros ;
Plionis, Manolis ;
Sola, Joan .
PHYSICAL REVIEW D, 2009, 80 (08)
[6]   Pseudoredundant vacuum energy [J].
Batra, Puneet ;
Hinterbichler, Kurt ;
Hui, Lam ;
Kabat, Daniel .
PHYSICAL REVIEW D, 2008, 78 (04)
[7]   The running of the cosmological and the Newton constants controlled by the cosmological event horizon [J].
Bauer, F .
CLASSICAL AND QUANTUM GRAVITY, 2005, 22 (17) :3533-3548
[8]  
BAUER F, 2006, ARXIVHEPTH0610178
[9]   Relaxing neutrino mass bounds by a running cosmological constant [J].
Bauer, Florian ;
Schrempp, Lily .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2008, (04)
[10]   Relaxing a large cosmological constant [J].
Bauer, Florian ;
Sola, Joan ;
Stefancic, Hrvoje .
PHYSICS LETTERS B, 2009, 678 (05) :427-433
12345