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Effective field theory approach to quasi-single field inflation

Masahide Yamaguchi Tokyo Institute of Technology
March 12, 2013

PIRSA:13030096
Astrophysics
12/13 PSI - Cosmology Review Lecture 14

Latham Boyle University of Edinburgh
March 08, 2013

PIRSA:13030045
Astrophysics
12/13 PSI - Cosmology Review Lecture 13

Latham Boyle University of Edinburgh
March 07, 2013

PIRSA:13030044
Astrophysics
Rethinking Cosmology
March 06, 2013

PIRSA:13030079
Astrophysics
12/13 PSI - Cosmology Review Lecture 12

Latham Boyle University of Edinburgh
March 06, 2013

PIRSA:13030043
Astrophysics
12/13 PSI - Cosmology Review Lecture 11

Latham Boyle University of Edinburgh
March 05, 2013

PIRSA:13030042
Astrophysics
Getting the Most out of a Black Hole

Alexander Tchekhovskoy Princeton University
March 04, 2013

PIRSA:13030102
Astrophysics
12/13 PSI - Cosmology Review Lecture 10

Latham Boyle University of Edinburgh
March 04, 2013

PIRSA:13030041
Astrophysics
12/13 PSI - Cosmology Review Lecture 9

Latham Boyle University of Edinburgh
March 01, 2013

PIRSA:13030038
Astrophysics
12/13 PSI - Cosmology Review Lecture 8

Latham Boyle University of Edinburgh
February 28, 2013

PIRSA:13020108
Astrophysics
12/13 PSI - Cosmology Review Lecture 7

Latham Boyle University of Edinburgh
February 27, 2013

PIRSA:13020107
Astrophysics
12/13 PSI - Cosmology Review Lecture 6

Latham Boyle University of Edinburgh
February 26, 2013

PIRSA:13020106
Astrophysics

Effective field theory approach to quasi-single field inflation

Masahide Yamaguchi Tokyo Institute of Technology
March 12, 2013

PIRSA:13030096
Astrophysics
We apply the effective field theory approach to quasi-single field inflation, which contains an additional scalar field with Hubble scale mass other than inflaton. Based on the time-dependent spatial diffeomorphism, which is not broken by the time-dependent background evolution, the most generic action of quasi-single field inflation is constructed up to third order fluctuations. Using the obtained action, the effects of the additional massive scalar field on the primordial curvature perturbations are discussed. In particular, we calculate the power spectrum and discuss the momentum-dependence of three point functions in the squeezed limit for general settings of quasi-single field inflation. Our framework can be also applied to inflation models with heavy particles. We make a qualitative discussion on the effects of heavy particles during inflation and that of sharp turning trajectory in our framework.
12/13 PSI - Cosmology Review Lecture 14

Latham Boyle University of Edinburgh
March 08, 2013

PIRSA:13030045
Astrophysics
12/13 PSI - Cosmology Review Lecture 13

Latham Boyle University of Edinburgh
March 07, 2013

PIRSA:13030044
Astrophysics
Rethinking Cosmology
March 06, 2013

PIRSA:13030079
Astrophysics
This talk will begin by discussing one by one the various reasons why cosmologists today consider the big bang inflationary cosmology to be the leading, if not proven, theory of the universe and then explaining why each of these reasons is flawed. This leads naturally to the question: what is the alternative? Understanding the flaws helps point the way.
12/13 PSI - Cosmology Review Lecture 12

Latham Boyle University of Edinburgh
March 06, 2013

PIRSA:13030043
Astrophysics
12/13 PSI - Cosmology Review Lecture 11

Latham Boyle University of Edinburgh
March 05, 2013

PIRSA:13030042
Astrophysics
Getting the Most out of a Black Hole

Alexander Tchekhovskoy Princeton University
March 04, 2013

PIRSA:13030102
Astrophysics
As black holes accrete surrounding gas, they often produce relativistic, collimated outflows, or jets. Jets are expected to form in the black hole vicinity making them powerful probes of strong-field gravity. However, how jet properties are connected to black hole and accretion flow properties has been unclear. Recent progress in computer simulations of black hole accretion enables studies of jet formation in unprecedented detail. For the first time, 3D general relativistic magnetohydrodynamic numerical simulations allow one to determine the maximum efficiency with which accretion onto black holes can power relativistic jets. I will present the dependence of this maximum efficiency on black hole spin and discuss how this dependence allows one to probe strong-field gravity. In realistic astrophysical systems, the angular momentum vector of the accretion flow can be tilted relative to the spin of the black hole. I will present the first simulations of jets from such tilted accretion systems and discuss their observational signatures.
12/13 PSI - Cosmology Review Lecture 10

Latham Boyle University of Edinburgh
March 04, 2013

PIRSA:13030041
Astrophysics
12/13 PSI - Cosmology Review Lecture 9

Latham Boyle University of Edinburgh
March 01, 2013

PIRSA:13030038
Astrophysics
12/13 PSI - Cosmology Review Lecture 8

Latham Boyle University of Edinburgh
February 28, 2013

PIRSA:13020108
Astrophysics
12/13 PSI - Cosmology Review Lecture 7

Latham Boyle University of Edinburgh
February 27, 2013

PIRSA:13020107
Astrophysics
12/13 PSI - Cosmology Review Lecture 6

Latham Boyle University of Edinburgh
February 26, 2013

PIRSA:13020106
Astrophysics

Title	Date	Collection	Type	Info
Effective field theory approach to quasi-single field inflation	2013‑03‑12	Cosmology and Gravitation	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 14	2013‑03‑08	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 13	2013‑03‑07	12/13 PSI - Cosmology Review	Course	View details
Rethinking Cosmology	2013‑03‑06	Colloquium	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 12	2013‑03‑06	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 11	2013‑03‑05	12/13 PSI - Cosmology Review	Course	View details
Getting the Most out of a Black Hole	2013‑03‑04	Colloquium	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 10	2013‑03‑04	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 9	2013‑03‑01	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 8	2013‑02‑28	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 7	2013‑02‑27	12/13 PSI - Cosmology Review	Course	View details
12/13 PSI - Cosmology Review Lecture 6	2013‑02‑26	12/13 PSI - Cosmology Review	Course	View details

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Format results

Effective field theory approach to quasi-single field inflation

12/13 PSI - Cosmology Review Lecture 14

12/13 PSI - Cosmology Review Lecture 13

Rethinking Cosmology

12/13 PSI - Cosmology Review Lecture 12

12/13 PSI - Cosmology Review Lecture 11

Getting the Most out of a Black Hole

12/13 PSI - Cosmology Review Lecture 10

12/13 PSI - Cosmology Review Lecture 9

12/13 PSI - Cosmology Review Lecture 8

12/13 PSI - Cosmology Review Lecture 7

12/13 PSI - Cosmology Review Lecture 6

Effective field theory approach to quasi-single field inflation

12/13 PSI - Cosmology Review Lecture 14

12/13 PSI - Cosmology Review Lecture 13

Rethinking Cosmology

12/13 PSI - Cosmology Review Lecture 12

12/13 PSI - Cosmology Review Lecture 11

Getting the Most out of a Black Hole

12/13 PSI - Cosmology Review Lecture 10

12/13 PSI - Cosmology Review Lecture 9

12/13 PSI - Cosmology Review Lecture 8

12/13 PSI - Cosmology Review Lecture 7

12/13 PSI - Cosmology Review Lecture 6