Built on

A. A. Starobinsky, Phys. Lett. 91B
1982
Earlier work this paper cites.
A.A. Starobinsky, Stochastic de sitter (inflationary) stage in the early universe, in Current topics in field theory, quantum gravity and strings, H.J. de Vega and N. Sanchez eds., Springer (1986)
1986
Earlier work this paper cites.
J. Yokoyama, Phys. Rev. Lett. 63
1989
Earlier work this paper cites.
D. S. Salopek, J. R. Bond and J. M. Bardeen, Phys. Rev. D 40
1989
Earlier work this paper cites.
M. Nagasawa and J. Yokoyama, “Phase transitions triggered by quantum fluctuations in the inflationary universe,” Nucl. Phys. B 370
1992
Earlier work this paper cites.
J. Silk and M. S. Turner, Phys. Rev. D 35
1992
Earlier work this paper cites.
A. D. Linde, “Hybrid inflation,” Phys. Rev. D 49
1994
Earlier work this paper cites.
A. A. Starobinsky and J. Yokoyama, Phys. Rev. D 50
1994
Earlier work this paper cites.
J. Garcia-Bellido, A. D. Linde and D. Wands, “Density perturbations and black hole formation in hybrid inflation,” Phys. Rev. D 54
1996
Earlier work this paper cites.
J. M. Maldacena, “Non-Gaussian features of primordial fluctuations in single field inflationary models,” JHEP 0305
2003
Earlier work this paper cites.
P. Creminelli and M. Zaldarriaga, “Single field consistency relation for the 3-point function,” JCAP 0410
2004
Earlier work this paper cites.
M. Yamaguchi and J. Yokoyama, “Chaotic hybrid new inflation in supergravity with a running spectral index,” Phys. Rev. D 68
2004
Earlier work this paper cites.
S. Weinberg, “Quantum contributions to cosmological correlations,” Phys. Rev. D 72
2005
Earlier work this paper cites.
M. Yamaguchi and J. Yokoyama, Phys. Rev. D 74
2006
Earlier work this paper cites.
M. Kawasaki, T. Takayama, M. Yamaguchi and J. Yokoyama, “Power Spectrum of the Density Perturbations From Smooth Hybrid New Inflation Model,” Phys. Rev. D 74
2006
Earlier work this paper cites.
C. Cheung, P. Creminelli, A. L. Fitzpatrick, J. Kaplan and L. Senatore, “The Effective Field Theory of Inflation,” JHEP 0803
Original
2008
Earlier work this paper cites.
M. Li and Y. Wang, “Multi-Stream Inflation,” JCAP 0907
Original
2009
Earlier work this paper cites.

Similar

X. Chen and Y. Wang, “Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation,” Phys. Rev. D 81
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2010
Cited alongside, same era.
X. Chen and Y. Wang, “Quasi-Single Field Inflation and Non-Gaussianities,” JCAP 1004
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2010
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X. Chen, “Primordial Non-Gaussianities from Inflation Models,” Adv. Astron. 2010
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Original

Then

A. Achucarro, V. Atal, S. Cespedes, J. O. Gong, G. A. Palma and S. P. Patil, “Heavy fields, reduced speeds of sound and decoupling during inflation,” Phys. Rev. D 86
Original
2012
Later among the works it cites.
A. A. Abolhasani, H. Firouzjahi, S. Khosravi and M. Sasaki, “Local Features with Large Spiky non-Gaussianities during Inflation,” JCAP 1211
Original
2012
Later among the works it cites.
R. Gwyn, G. A. Palma, M. Sakellariadou and S. Sypsas, “Effective field theory of weakly coupled inflationary models,” JCAP 1304
Original
2013
Later among the works it cites.
J. O. Gong, S. Pi and M. Sasaki, “Equilateral non-Gaussianity from heavy fields,” JCAP 1311
Original
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Later among the works it cites.
Y. Wang, “Inflation, Cosmic Perturbations and Non-Gaussianities,” Commun. Theor. Phys. 62

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2018

Hybrid Quasi-Single Field Inflation

Wang, Yi, Wu, Yi-Peng, Yokoyama, Jun'ichi et al.

Understand

The decay of massive particles during inflation generates characteristic signals in the squeezed limit of the primordial bispectrum.

These signals are in particular distinctive in the regime of the quasi-single field inflation, where particles are oscillating with masses comparable to the Hubble scale.
We apply the investigation to a class of scalar particles that experience a so-called waterfall phase transition in the isocurvature direction driven by the symmetry-breaking mechanism based on the hybrid inflation scenario.
With a time-varying mass, a novel shape of oscillatory bispectrum is presented as the signature of a waterfall phase transition during inflation.

Built on

A. A. Starobinsky, Phys. Lett. 91B
1982
Earlier work this paper cites.
A.A. Starobinsky, Stochastic de sitter (inflationary) stage in the early universe, in Current topics in field theory, quantum gravity and strings, H.J. de Vega and N. Sanchez eds., Springer (1986)
1986
Earlier work this paper cites.
J. Yokoyama, Phys. Rev. Lett. 63
1989
Earlier work this paper cites.
D. S. Salopek, J. R. Bond and J. M. Bardeen, Phys. Rev. D 40
1989
Earlier work this paper cites.
M. Nagasawa and J. Yokoyama, “Phase transitions triggered by quantum fluctuations in the inflationary universe,” Nucl. Phys. B 370
1992
Earlier work this paper cites.
J. Silk and M. S. Turner, Phys. Rev. D 35
1992
Earlier work this paper cites.
A. D. Linde, “Hybrid inflation,” Phys. Rev. D 49
1994
Earlier work this paper cites.
A. A. Starobinsky and J. Yokoyama, Phys. Rev. D 50
1994
Earlier work this paper cites.
J. Garcia-Bellido, A. D. Linde and D. Wands, “Density perturbations and black hole formation in hybrid inflation,” Phys. Rev. D 54
1996
Earlier work this paper cites.
J. M. Maldacena, “Non-Gaussian features of primordial fluctuations in single field inflationary models,” JHEP 0305
2003
Earlier work this paper cites.
P. Creminelli and M. Zaldarriaga, “Single field consistency relation for the 3-point function,” JCAP 0410
2004
Earlier work this paper cites.
M. Yamaguchi and J. Yokoyama, “Chaotic hybrid new inflation in supergravity with a running spectral index,” Phys. Rev. D 68
2004
Earlier work this paper cites.
S. Weinberg, “Quantum contributions to cosmological correlations,” Phys. Rev. D 72
2005
Earlier work this paper cites.
M. Yamaguchi and J. Yokoyama, Phys. Rev. D 74
2006
Earlier work this paper cites.
M. Kawasaki, T. Takayama, M. Yamaguchi and J. Yokoyama, “Power Spectrum of the Density Perturbations From Smooth Hybrid New Inflation Model,” Phys. Rev. D 74
2006
Earlier work this paper cites.
C. Cheung, P. Creminelli, A. L. Fitzpatrick, J. Kaplan and L. Senatore, “The Effective Field Theory of Inflation,” JHEP 0803
Original
2008
Earlier work this paper cites.
M. Li and Y. Wang, “Multi-Stream Inflation,” JCAP 0907
Original
2009
Earlier work this paper cites.