Scale dependence of fNL in N-flation

Journal of Cosmology and Astroparticle Physics

Volumn 2010, Issue 12, 2010, Pages

  Huang, Qing Guo ^a  

^a INSTITUTE OF THEORETICAL PHYSICS   (China)

Author keywords

Axions; Inflation; Non gaussianity

Indexed keywords

EID: 78651504647     PISSN: 14757516     EISSN: 14757516     Source Type: Journal    
DOI: 10.1088/1475-7516/2010/12/017     Document Type: Article

References (36)

1. J. M. Maldacena, Non-Gaussian features of primordial fluctuations in single field inflationary models, JHEP 05 (2003) 013 [astro-ph/0210603].
2. A. A. Starobinsky, Multicomponent de Sitter (inflationary) stages and the generation of perturbations, JETP Lett. 42 (1985) 152;
3. M. Sasaki and E. D. Stewart, A general analytic formula for the spectral index of the density perturbations produced during inflation, Prog. Theor. Phys. 95 (1996) 71 [astro-ph/9507001];
4. M. Sasaki and T. Tanaka, Super-horizon scale dynamics of multi-scalar inflation, Prog. Theor. Phys. 99 (1998) 763 [gr-qc/9801017];
5. D. H. Lyth, K. A. Malik and M. Sasaki, A general proof of the conservation of the curvature perturbation, JCAP 05 (2005) 004 [astro-ph/0411220];
6. D. H. Lyth and Y. Rodriguez, The inflationary prediction for primordial non-Gaussianity, Phys. Rev. Lett. 95 (2005) 121302 [astro-ph/0504045].
7. C. T. Byrnes, K.-Y. Choi and L. M. H. Hall, Conditions for large non-Gaussianity in two-field slow-roll inflation, JCAP 10 (2008) 008 [arXiv:0807.1101].
8. C. T. Byrnes, K.-Y. Choi and L. M. H. Hall, Large non-Gaussianity from two-component hybrid inflation, JCAP 02 (2009) 017 [arXiv:0812.0807].
9. S. A. Kim, A. R. Liddle and D. Seery, Non-Gaussianity in axion N-flation models, Phys. Rev. Lett. 105 (2010) 181302 [arXiv:1005.4410].
10. D. H. Lyth, Generating the curvature perturbation at the end of inflation, JCAP 11 (2005) 006 [astro-ph/0510443].
11. M. Sasaki, Multi-brid inflation and non-Gaussianity, Prog. Theor. Phys. 120 (2008) 159 [arXiv:0805.0974].
12. Q.-G. Huang, A geometric description of the non-Gaussianity generated at the end of multi-field inflation, JCAP 06 (2009) 035 [arXiv:0904.2649].
13. F. Vernizzi and D. Wands, Non-Gaussianities in two-field inflation, JCAP 05 (2006) 019 [astro-ph/0603799].
14. S. A. Kim and A. R. Liddle, Nflation: multi-field inflationary dynamics and perturbations, Phys. Rev. D 74 (2006) 023513 [astro-ph/0605604].
15. Y.-S. Piao, On perturbation spectra of N-flation, Phys. Rev. D 74 (2006) 047302 [gr-qc/0606034];
16. R.-G. Cai, B. Hu and Y.-S. Piao, Entropy perturbations in N-flation model, Phys. Rev. D 80 (2009) 123505 [arXiv:0909.5251].
17. S. A. Kim and A. R. Liddle, Nflation: Non-Gaussianity in the horizon-crossing approximation, Phys. Rev. D 74 (2006) 063522 [astro-ph/0608186].
18. T. Battefeld and R. Easther, Non-Gaussianities in multi-field inflation, JCAP 03 (2007) 020 [astro-ph/0610296].
19. D. Battefeld and T. Battefeld, Non-Gaussianities in N-flation, JCAP 05 (2007) 012 [hep-th/0703012].
20. D. Langlois, F. Vernizzi and D. Wands, Non-linear isocurvature perturbations and non-Gaussianities, JCAP 12 (2008) 004 [arXiv:0809.4646].
21. D. J. Mulryne, D. Seery and D. Wesley, Moment transport equations for the primordial curvature perturbation, arXiv:1008.3159.
22. T. Wang, Note on Non-Gaussianities in two-field inflation, arXiv:1008.3198.
23. T. Suyama, T. Takahashi, M. Yamaguchi and S. Yokoyama, On classification of models of large local-type non-Gaussianity, arXiv:1009.1979.
24. E. Sefusatti, M. Liguori, A. P. S. Yadav, M. G. Jackson and E. Pajer, Constraining running non-Gaussianity, JCAP 12 (2009) 022 [arXiv:0906.0232].
25. NL, JCAP 02 (2010) 034 [arXiv:0911.2780].
26. C. T. Byrnes, M. Gerstenlauer, S. Nurmi, G. Tasinato and D. Wands, Scale-dependent non-Gaussianity probes inflationary physics, JCAP 10 (2010) 004 [arXiv:1007.4277].
27. C. T. Byrnes, K. Enqvist and T. Takahashi, Scale-dependence of non-Gaussianity in the curvaton model, JCAP 09 (2010) 026 [arXiv:1007.5148].
28. NL in the axion-type curvaton model, JCAP 11 (2010) 026 [arXiv:1008.2641].
29. A. Riotto and M. S. Sloth, Strongly scale-dependent non-Gaussianity, arXiv:1009.3020.
30. D. H. Lyth and A. Riotto, Particle physics models of inflation and the cosmological density perturbation, Phys. Rept. 314 (1999) 1 [hep-ph/9807278].
31. M. Sasaki and E. D. Stewart, A general analytic formula for the spectral index of the density perturbations produced during inflation, Prog. Theor. Phys. 95 (1996) 71 [astro-ph/9507001].
32. E. Komatsu et al., Seven-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: cosmological interpretation, arXiv:1001.4538.
33. N. Arkani-Hamed, H.-C. Cheng, P. Creminelli and L. Randall, Extranatural inflation, Phys. Rev. Lett. 90 (2003) 221302 [hep-th/0301218].
34. T. Banks, M. Dine, P. J. Fox and E. Gorbatov, On the possibility of large axion decay constants, JCAP 06 (2003) 001 [hep-th/0303252].
35. S. Dimopoulos, S. Kachru, J. McGreevy and J. G. Wacker, N-flation, JCAP 08 (2008) 003 [hep-th/0507205].
36. Q.-G. Huang, Weak gravity conjecture for the effective field theories with N species, Phys. Rev. D 77 (2008) 105029 [arXiv:0712.2859].