Oscillation in power spectrum of primordial gravitational wave as a signature of higher-order stringy corrections

被引：11

作者：

Cai, Yong ^{[1
]}

Wang, Yu-Tong ^{[1
]}

Piao, Yun-Song ^{[1
,2
]}

机构：

[1] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 02期

关键词：

Cosmology of Theories beyond the SM; Superstrings and Heterotic Strings; M-THEORY COMPACTIFICATION; GRAVITY-WAVES; PERTURBATIONS; INFLATION;

D O I：

10.1007/JHEP02(2016)059

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In low-energy effective string theory, alpha' corrections involve the coupling of the dilaton field to Gauss-Bonnet term. We assume that the dilaton potential is fine tuned so that the dilaton field may oscillate rapidly for a while around the minimum of its potential but the inflation background is not affected. By numerical method, we find that if the dilaton starts to oscillate at the time of about similar to 60 e-folds before the end of inflation, alpha' correction may bring unusual oscillations to the inflationary gravitational wave spectrum, which might be measurably imprinted in the CMB B-mode polarization.

引用

页码：1 / 17

页数：17

共 43 条

[1] Inflationary perturbations from a potential with a step [J].

Adams, J ;

Cresswell, B ;

Easther, R .

PHYSICAL REVIEW D, 2001, 64 (12) :6

[2] Joint Analysis of BICEP2/Keck Array and Planck Data [J].

Ade, P. A. R. ;

Aghanim, N. ;

Ahmed, Z. ;

Aikin, R. W. ;

Alexander, K. D. ;

Arnaud, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barkats, D. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Bartolo, N. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Benton, S. J. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bischoff, C. A. ;

Bock, J. J. ;

Bonaldi, A. ;

Bonavera, L. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Brevik, J. A. ;

Bucher, M. ;

Buder, I. ;

Bullock, E. ;

Burigana, C. ;

Butler, R. C. ;

Buza, V. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chary, R. -R. ;

Chiang, H. C. ;

Christensen, P. R. ;

Colombo, L. P. L. ;

Combet, C. ;

Connors, J. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. .

PHYSICAL REVIEW LETTERS, 2015, 114 (10) :1-17

[3] Inflation from superstring and M-theory compactification with higher order corrections. II. Case of quartic Weyl terms [J].

Akune, Kenta ;

Maeda, Kei-ichi ;

Ohta, Nobuyoshi .

PHYSICAL REVIEW D, 2006, 73 (10)

[4] Effects of modified gravity on B-mode polarization [J].

Amendola, Luca ;

Ballesteros, Guillermo ;

Pettorino, Valeria .

PHYSICAL REVIEW D, 2014, 90 (04)

[5]

[Anonymous], ARXIV14042601

[6]

[Anonymous], HEPPH0210162

[7]

[Anonymous], ARXIV150202114

[8]

[Anonymous], ARXIV13112312

[9]

Becker K., 2007, String Theory and M-Theory: A Modern Introduction

[10] String inflation after Planck 2013 [J].

Burgess, C. P. ;

Cicoli, M. ;

Quevedo, F. .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2013, (11)

← 1 2 3 4 5 →