Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation - INSPIRE

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Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation

Xingang Chen
(
- MIT and
- Cambridge U., DAMTP
)
,
Yi Wang
(
- McGill U. and
- Beijing, KITPC
)

Sep, 2009

5 pages

Published in:

Phys.Rev.D 81 (2010) 063511

e-Print:

0909.0496 [astro-ph.CO]

DOI:

10.1103/PhysRevD.81.063511

Report number:

MIT-CTP-4071

View in:

ADS Abstract Service

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Abstract: (arXiv)

We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions.

98.70.Vc
98.80.Cq
non-Gaussianity
slow-roll approximation
inflaton: trajectory
inflation
correlation function
Hubble constant
curvature
power spectrum

References(29)

Figures(4)

The Inflationary Universe: A Possible Solution to the Horizon and Flatness Problems

Alan H. Guth
(
- SLAC
)

- Phys.Rev.D 23 (1981) 347-356,
- Adv.Ser.Astrophys.Cosmol. 3 (1987) 139-148 (reprint)
•
DOI:
- 10.1103/PhysRevD.23.347

A New Inflationary Universe Scenario: A Possible Solution of the Horizon, Flatness, Homogeneity, Isotropy and Primordial Monopole Problems

Andrei D. Linde
(
- Lebedev Inst.
)

- Phys.Lett.B 108 (1982) 389-393,
- In *Moscow 1981, Proceedings, Quantum Gravity*, 185-195 and Moscow Inst. Phys. Acad. Sci. - 81-229 (81,REC.DEC.) 15p,
- Adv.Ser.Astrophys.Cosmol. 3 (1987) 149-153 (reprint)
•
DOI:
- 10.1016/0370-2693(82)91219-9

Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking

- Phys.Rev.Lett. 48 (1982) 1220-1223,
- Adv.Ser.Astrophys.Cosmol. 3 (1987) 158-161 (reprint)
•
DOI:
- 10.1103/PhysRevLett.48.1220

False vacuum inflation with Einstein gravity

- Phys.Rev.D 49 (1994) 6410-6433
•
e-Print:
- astro-ph/9401011
•
DOI:
- 10.1103/PhysRevD.49.6410

Fine-Tuning in DBI Inflationary Mechanism

Xingang Chen
(
- MIT, LNS
)

- JCAP 12 (2008) 009
•
e-Print:
- 0807.3191
•
DOI:
- 10.1088/1475-7516/2008/12/009

Non-Gaussian features of primordial fluctuations in single field inflationary models

Juan Martin Maldacena
(
- Princeton, Inst. Advanced Study
)

- JHEP 05 (2003) 013
•
e-Print:
- astro-ph/0210603
•
DOI:
- 10.1088/1126-6708/2003/05/013

Second order cosmological perturbations from inflation

Viviana Acquaviva
(
- Pisa U.
)
,
Nicola Bartolo
(
- Padua U. and
- INFN, Padua
)
,
Sabino Matarrese
(
- Padua U. and
- INFN, Padua
)
,
Antonio Riotto
(
- INFN, Padua
)

- Nucl.Phys.B 667 (2003) 119-148
•
e-Print:
- astro-ph/0209156
•
DOI:
- 10.1016/S0550-3213(03)00550-9

The Angular dependence of the three point correlation function of the cosmic microwave background radiation as predicted by inflationary cosmologies

Toby Falk
(
- UC, Santa Barbara
)
,
Raghavan Rangarajan
(
- UC, Santa Barbara
)
,
Mark Srednicki
(
- UC, Santa Barbara
)

- Astrophys.J.Lett. 403 (1993) L1
•
e-Print:
- astro-ph/9208001
•
DOI:
- 10.1086/186707

Quantum contributions to cosmological correlations

Steven Weinberg
(
- Texas U.
)

- Phys.Rev.D 72 (2005) 043514
•
e-Print:
- hep-th/0506236
•
DOI:
- 10.1103/PhysRevD.72.043514

Nonlinear evolution of long wavelength metric fluctuations in inflationary models

D.S. Salopek
(
- Fermilab
)
,
J.R. Bond
(
- Canadian Inst. Theor. Astrophys.
)

- Phys.Rev.D 42 (1990) 3936-3962
•
DOI:
- 10.1103/PhysRevD.42.3936

Adiabatic and entropy perturbations from inflation

Christopher Gordon
(
- Portsmouth U.
)
,
David Wands
(
- Portsmouth U.
)
,
Bruce A. Bassett
(
- Portsmouth U.
)
,
Roy Maartens
(
- Portsmouth U.
)

- Phys.Rev.D 63 (2000) 023506
•
e-Print:
- astro-ph/0009131
•
DOI:
- 10.1103/PhysRevD.63.023506

Oscillations during inflation and cosmological density perturbations

N. Bartolo
(
- Padua U. and
- INFN, Padua
)
,
S. Matarrese
(
- Padua U. and
- INFN, Padua
)
,
A. Riotto
(
- INFN, Padua
)

- Phys.Rev.D 64 (2001) 083514
•
e-Print:
- astro-ph/0106022
•
DOI:
- 10.1103/PhysRevD.64.083514

Adiabatic and isocurvature perturbations from inflation: Power spectra and consistency relations

N. Bartolo
(
- Padua U. and
- INFN, Padua
)
,
S. Matarrese
(
- Padua U. and
- INFN, Padua
)
,
A. Riotto
(
- INFN, Padua
)

- Phys.Rev.D 64 (2001) 123504
•
e-Print:
- astro-ph/0107502
•
DOI:
- 10.1103/PhysRevD.64.123504

NonGaussianity in multifield inflation

Francis Bernardeau
(
- Saclay
)
,
Jean-Philippe Uzan
(
- Orsay, LPT and
- Paris, Inst. Astrophys.
)

- Phys.Rev.D 66 (2002) 103506
•
e-Print:
- hep-ph/0207295
•
DOI:
- 10.1103/PhysRevD.66.103506

Inflationary models inducing non-Gaussian metric fluctuations

Francis Bernardeau
(
- Saclay
)
,
Jean-Philippe Uzan
(
- Orsay, LPT and
- Paris, Inst. Astrophys.
)

- Phys.Rev.D 67 (2003) 121301
•
e-Print:
- astro-ph/0209330
•
DOI:
- 10.1103/PhysRevD.67.121301

Inflationary trispectrum from graviton exchange

David Seery
(
- Cambridge U., DAMTP
)
,
Martin S. Sloth
(
- Aarhus U.
)
,
Filippo Vernizzi
(
- Saclay, SPhT and
- ICTP, Trieste
)

- JCAP 03 (2009) 018
•
e-Print:
- 0811.3934
•
DOI:
- 10.1088/1475-7516/2009/03/018

The 'in-in' Formalism and Cosmological Perturbations

Peter Adshead
(
- Yale U.
)
,
Richard Easther
(
- Yale U.
)
,
Eugene A. Lim
(
- Columbia U. and
- ISCAP, New York
)

- Phys.Rev.D 80 (2009) 083521
•
e-Print:
- 0904.4207
•
DOI:
- 10.1103/PhysRevD.80.083521

Large Primordial Trispectra in General Single Field Inflation

Xingang Chen
(
- MIT
)
,
Bin Hu
(
- Beijing, KITPC
)
,
Min-xin Huang
(
- CERN
)
,
Gary Shiu
(
- Wisconsin U., Madison and
- Princeton, Inst. Advanced Study
)
,
Yi Wang
(
- Beijing, KITPC
)

- JCAP 08 (2009) 008
•
e-Print:
- 0905.3494
•
DOI:
- 10.1088/1475-7516/2009/08/008

A General analytic formula for the spectral index of the density perturbations produced during inflation

Misao Sasaki
(
- Osaka U.
)
,
Ewan D. Stewart
(
- Lancaster U.
)

- Prog.Theor.Phys. 95 (1996) 71-78
•
e-Print:
- astro-ph/9507001
•
DOI:
- 10.1143/PTP.95.71

The Inflationary prediction for primordial non-Gaussianity

David H. Lyth
(
- Lancaster U.
)
,
Yeinzon Rodriguez
(
- Lancaster U. and
- Antonio Narino U.
)

- Phys.Rev.Lett. 95 (2005) 121302
•
e-Print:
- astro-ph/0504045
•
DOI:
- 10.1103/PhysRevLett.95.121302

Non-linear perturbations in multiple-field inflation

G.I. Rigopoulos
(
- Cambridge U., DAMTP
)
,
E.P.S. Shellard
(
- Cambridge U., DAMTP
)
,
B.J.W. van Tent
(
- Cambridge U., DAMTP
)

- Phys.Rev.D 73 (2006) 083521
•
e-Print:
- astro-ph/0504508
•
DOI:
- 10.1103/PhysRevD.73.083521

Primordial non-Gaussianities from multiple-field inflation

- JCAP 09 (2005) 011
•
e-Print:
- astro-ph/0506056
•
DOI:
- 10.1088/1475-7516/2005/09/011

Non-gaussianities in two-field inflation

- JCAP 05 (2006) 019
•
e-Print:
- astro-ph/0603799
•
DOI:
- 10.1088/1475-7516/2006/05/019

Primordial perturbations and non-Gaussianities in DBI and general multi-field inflation

David Langlois
(
- APC, Paris and
- Paris, Inst. Astrophys.
)
,
Sebastien Renaux-Petel
(
- APC, Paris
)
,
Daniele A. Steer
(
- APC, Paris and
- CERN
)
,
Takahiro Tanaka
(
- Kyoto U.
)

- Phys.Rev.D 78 (2008) 063523
•
e-Print:
- 0806.0336
•
DOI:
- 10.1103/PhysRevD.78.063523

Non-gaussianity from the bispectrum in general multiple field inflation

Frederico Arroja
(
- Portsmouth U., ICG
)
,
Shuntaro Mizuno
(
- Tokyo U., RESCEU
)
,
Kazuya Koyama
(
- Portsmouth U., ICG
)

- JCAP 08 (2008) 015
•
e-Print:
- 0806.0619
•
DOI:
- 10.1088/1475-7516/2008/08/015

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