Primordial anisotropies in gauged hybrid inflation

被引：37

作者：

Abolhasani, Ali Akbar ^{[1
]}

Emami, Razieh ^{[1
,2
]}

Firouzjahi, Hassan ^{[3
]}

机构：

[1] Inst Res Fundamental Sci IPM, Sch Phys, POB 19395-5531, Tehran, Iran

[2] Abdus Salam Int Ctr Theoret Phys, I-34151 Trieste, Italy

[3] Inst Res Fundamental Sci IPM, Sch Astron, Tehran, Iran

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 05期

关键词：

inflation; non-gaussianity; cosmological perturbation theory; FIELDS;

D O I：

10.1088/1475-7516/2014/05/016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study primordial anisotropies generated in the model of gauged hybrid inflation in which the complex waterfall field is charged under a U(1) gauge field. Primordial anisotropies are generated either actively during inflation or from inhomogeneities modulating the surface of end of inflation during waterfall transition. We present a consistent delta N mechanism to calculate the anisotropic power spectrum and bispectrum. We show that the primordial anisotropies generated at the surface of end of inflation do not depend on the number of e-folds and therefore do not produce dangerously large anisotropies associated with the IR modes. Furthermore, one can find the parameter space that the anisotropies generated from the surface of end of inflation cancel the anisotropies generated during inflation, therefore relaxing the constrains on model parameters imposed from IR anisotropies. We also show that the gauge field fluctuations induce a red-tilted power spectrum so the averaged power spectrum from the gauge field can change the total power spectrum from blue to red. Therefore, hybrid inflation, once gauged under a 15(1) field, can be consistent with the cosmological observations.

引用

页数：30

共 104 条

[1]

Abolhasani A.A., 2012, JCAP, V11, P012

[2] δN formalism in anisotropic inflation and large anisotropic bispectrum and trispectrum [J].

Abolhasani, Ali Akbar ;

Emami, Razieh ;

Firouzjaee, Javad T. ;

Firouzjahi, Hassan .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2013, (08)

[3] Curvature perturbation and waterfall dynamics in hybrid inflation [J].

Abolhasani, Ali Akbar ;

Firouzjahi, Hassan ;

Sasaki, Misao .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2011, (10)

[4] Curvature perturbations and non-Gaussianities from the waterfall phase transition during inflation [J].

Abolhasani, Ali Akbar ;

Firouzjahi, Hassan ;

Namjoo, Mohammad Hossein .

CLASSICAL AND QUANTUM GRAVITY, 2011, 28 (07)

[5] No large scale curvature perturbations during the waterfall phase transition of hybrid inflation [J].

Abolhasani, Ali Akbar ;

Firouzjahi, Hassan .

PHYSICAL REVIEW D, 2011, 83 (06)

[6] Planck 2013 results. XXIII. Isotropy and statistics of the CMB [J].

Ade, P. A. R. ;

Aghanim, N. ;

Armitage-Caplan, C. ;

Arnaud, M. ;

Ashdown, M. ;

Atrio-Barandela, F. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Bartolo, N. ;

Battaner, E. ;

Battye, R. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bobin, J. ;

Bock, J. J. ;

Bonaldi, A. ;

Bonavera, L. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bridges, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chiang, H. C. ;

Chiang, L. -Y ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Cruz, M. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. .

ASTRONOMY & ASTROPHYSICS, 2014, 571

[7] Planck 2013 results. XXII. Constraints on inflation [J].

Ade, P. A. R. ;

Aghanim, N. ;

Armitage-Caplan, C. ;

Arnaud, M. ;

Ashdown, M. ;

Atrio-Barandela, F. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Bartolo, N. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bobin, J. ;

Bock, J. J. ;

Bonaldi, A. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bridges, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chiang, H. C. ;

Chiang, L. -Y. ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. ;

Davis, R. J. ;

de Bernardis, P. .

ASTRONOMY & ASTROPHYSICS, 2014, 571

[8] Planck 2013 results. XVI. Cosmological parameters [J].

Ade, P. A. R. ;

Aghanim, N. ;

Armitage-Caplan, C. ;

Arnaud, M. ;

Ashdown, M. ;

Atrio-Barandela, F. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bobin, J. ;

Bock, J. J. ;

Bonaldi, A. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bridges, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cappellini, B. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chen, X. ;

Chiang, H. C. ;

Chiang, L. -Y ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. .

ASTRONOMY & ASTROPHYSICS, 2014, 571

[9]

[Anonymous], NATL GEOGR

[10] Curvaton and the inhomogeneous end of inflation [J].

Assadullahi, Hooshyar ;

Firouzjahi, Hassan ;

Namjoo, Mohammad Hossein ;

Wands, David .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, (12)

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