Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach

Turner, Jessica; Zhou, Ye-Ling

doi:10.1007/JHEP01(2020)022

Title: Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach

Abstract

In this work we provide a detailed study of the CP violating phase transition (CPPT) which is a new mechanism proposed to produce a baryon asymmetry. This mechanism exploits the Weinberg operator whose coefficient is dynamically realised from the vacuum expectation values (VEVs) of new scalars. In the specific case of the first order phase transition, the scalar VEVs vary in the bubble wall which separates the two phases. This results in a spacetime varying coefficient for the Weinberg operator. The interference of two Weinberg operators at different spacetime points generates a CP asymmetry between lepton and anti-lepton production/annihilation processes, which eventually results in an asymmetry between baryon and anti-baryon number densities in the early Universe. We present the calculation of the lepton asymmetry, based on non-equilibrium quantum field theory methods, in full. We consider the influence of the bubble wall characteristics and the impact of thermal effects on the lepton asymmetry and draw a comparison between the CPPT mechanism and electroweak baryogenesis.

Authors:

Turner, Jessica ^[1];

^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Durham Univ. (United Kingdom)

Publication Date:: Tue Jan 07 00:00:00 EST 2020

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); European Research Council (ERC)

OSTI Identifier:: 1471727

Report Number(s):: arXiv:1808.00470; IPPP/18/65; FERMILAB-PUB-18-329-T
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1684793

Grant/Contract Number:: AC02-07CH11359; FP7-IDEAS-ERC; ERC-CG-617143

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2020; Journal Issue: 1; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Cosmology of Theories Beyond the SM; CP Violation; Neutrino Physics; Thermal Field Theory

Citation Formats


                    Turner, Jessica, and Zhou, Ye-Ling. Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach.  United States: N. p., 2020. 
Web.  doi:10.1007/JHEP01(2020)022.

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                    Turner, Jessica, & Zhou, Ye-Ling. Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach.  United States.  https://doi.org/10.1007/JHEP01(2020)022

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                    Turner, Jessica, and Zhou, Ye-Ling. Tue .  
"Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach".  United States.  https://doi.org/10.1007/JHEP01(2020)022.  https://www.osti.gov/servlets/purl/1471727.

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@article{osti_1471727,

  title        = {Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach},

  author       = {Turner, Jessica and Zhou, Ye-Ling},

  abstractNote = {In this work we provide a detailed study of the CP violating phase transition (CPPT) which is a new mechanism proposed to produce a baryon asymmetry. This mechanism exploits the Weinberg operator whose coefficient is dynamically realised from the vacuum expectation values (VEVs) of new scalars. In the specific case of the first order phase transition, the scalar VEVs vary in the bubble wall which separates the two phases. This results in a spacetime varying coefficient for the Weinberg operator. The interference of two Weinberg operators at different spacetime points generates a CP asymmetry between lepton and anti-lepton production/annihilation processes, which eventually results in an asymmetry between baryon and anti-baryon number densities in the early Universe. We present the calculation of the lepton asymmetry, based on non-equilibrium quantum field theory methods, in full. We consider the influence of the bubble wall characteristics and the impact of thermal effects on the lepton asymmetry and draw a comparison between the CPPT mechanism and electroweak baryogenesis.},

  doi          = {10.1007/JHEP01(2020)022},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 1,

  volume       = 2020,

  place        = {United States},

  year         = {Tue Jan 07 00:00:00 EST 2020},

  month        = {Tue Jan 07 00:00:00 EST 2020}

}

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Title: Leptogenesis via varying Weinberg operator: the Closed-Time-Path approach

Abstract

Citation Formats

Baryogenesis via Neutrino Oscillations journal, August 1998

Symmetry realization of texture zeros journal, August 2004

Electroweak baryogenesis journal, December 2012

Running neutrino masses, mixings and CP phases: analytical results and phenomenological consequences journal, December 2003

A Theory of Spontaneous T Violation journal, August 1973

Improved results in supersymmetric electroweak baryogenesis journal, February 2003

Gravitational radiation from first-order phase transitions journal, March 1994

Geometrical spontaneous C P violation journal, December 2011

Results from KamLAND-Zen conference, January 2015

Electroweak baryogenesis journal, June 2007

Pathways to Naturally Small Neutrino Masses journal, August 1998

Geometrical T-violation journal, March 1984

Kadanoff–Baym approach to flavour mixing and oscillations in resonant leptogenesis journal, February 2015

Resonant enhancement in leptogenesis journal, February 2018

Status and Results from the EXO Collaboration journal, January 2014

Gravitational waves from first-order cosmological phase transitions journal, October 1992

Resonant leptogenesis journal, August 2004

NMSSM and seesaw physics at LHC journal, February 2009

Baryon- and Lepton-Nonconserving Processes journal, November 1979

Baryogenesis below The Electroweak Scale journal, August 1999

Bubbles in the supersymmetric standard model journal, August 1998

CPT violation and baryogenesis journal, March 1997

Leptogenesis via a varying Weinberg operator: a semi-classical approach journal, March 2019

Electroweak Baryogenesis conference, July 2000

NMSSM and Seesaw Physics at LHC text, January 2008

Pathways to Naturally Small Neutrino Masses text, January 1998

Baryogenesis via Neutrino Oscillations
journal, August 1998

Symmetry realization of texture zeros
journal, August 2004

Electroweak baryogenesis
journal, December 2012

Running neutrino masses, mixings and CP phases: analytical results and phenomenological consequences
journal, December 2003

A Theory of Spontaneous $T$ Violation
journal, August 1973

Improved results in supersymmetric electroweak baryogenesis
journal, February 2003

Gravitational radiation from first-order phase transitions
journal, March 1994

Geometrical spontaneous C P violation
journal, December 2011

Results from KamLAND-Zen
conference, January 2015

Electroweak baryogenesis
journal, June 2007

Pathways to Naturally Small Neutrino Masses
journal, August 1998

Geometrical T-violation
journal, March 1984

Kadanoff–Baym approach to flavour mixing and oscillations in resonant leptogenesis
journal, February 2015

Resonant enhancement in leptogenesis
journal, February 2018

Status and Results from the EXO Collaboration
journal, January 2014

Gravitational waves from first-order cosmological phase transitions
journal, October 1992

Resonant leptogenesis
journal, August 2004

NMSSM and seesaw physics at LHC
journal, February 2009

Baryon- and Lepton-Nonconserving Processes
journal, November 1979

Baryogenesis below The Electroweak Scale
journal, August 1999

Bubbles in the supersymmetric standard model
journal, August 1998

CPT violation and baryogenesis
journal, March 1997

Leptogenesis via a varying Weinberg operator: a semi-classical approach
journal, March 2019

Electroweak Baryogenesis
conference, July 2000

NMSSM and Seesaw Physics at LHC
text, January 2008

Pathways to Naturally Small Neutrino Masses
text, January 1998