New observational windows on the high-scale origin of matter-antimatter asymmetry

Asia/Tokyo
Online

Online

Description

Dates: January 10-14,  2022 (JST)

Venue: Online event

Overview:

The matter-antimatter asymmetry is one of the fundamental mysteries motivating research of physics beyond the Standard Model. Research in this area literately attempts to answer the question of why are we here. Unfortunately, the most elegant explanations frequently involve physics many orders of magnitude above the weak scale. There has been much recent progress on how to test these ideas.  Furthermore, the advent of gravitational waves astronomy opens a new observational window on the origin of matter in the universe. 

Given the fundamental nature of this problem and the ``out of the box'' thinking required to tackle it, we will dedicate a focus week in early January with a minimum number of talks to allow room for discussion and brainstorming. The talks that are given will summarize recent progress in the two main paradigms (Leptogenesis and Affleck Dine) and summarize other high scale paradigms with an emphasis on how to test them.

 

Confirmed speakers

Dr Iason Baldes
Dr Pasquale Di Bari
Dr Neil Barrie
Dr Raymond Co
Prof Yanou Cui
Dr Valerie Domcke
Dr David Dunsky
Dr Marcos M. Flores
Dr Julia Harz
Dr Renata Kallosh
Prof Masahiro Kawasaki
Prof Kaz Kohri
Dr David Marsh
Dr Nobuchika Okada
Dr Silvia Pascoli
Dr Lauren Pearce
Prof Serguey Petcov
Prof Michael Ramsey-Musolf
Prof Misao Sasaki
Dr Geraldine Servant
Dr Jessica Turner
Dr Isaac Wang
Prof Masaki Yamada

 

 

Organizers:

Graham White
Alex Kusenko
Hitoshi Murayama

 

Diversity Coordinator:  Hitoshi Murayama

Address:
Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU),
the University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa City, Chiba 277-8583, Japan

 


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Registration
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    • 5
      Inflation in String theory and Supergravity
      Speaker: Renata Kallosh
    • 1:30 AM
      Discussion
    • 6
      Confronting GUTs with Proton Decay and Gravitational Waves
      Speaker: Jessica Turner
    • 7
      Neutrinoless double beta decay and leptogenesis
      Speaker: Silvia Pascoli
    • 10:00 PM
      Break
    • 8
      Probing Baryogenesis
      Speaker: Harz Julia
    • 9
      SO(10)-inspired leptogenesis
      Speaker: Pasquale Di Bari
    • 10
      Aspects of High Scale Leptogenesis with Low Energy CP Violation (Recent Results)
      Speaker: Serguey Petcov
    • 1:30 AM
      Discussion
    • 11
      Field space geometry and Affleck-Dine Baryogengesis (cancelled)
      Speaker: David Marsh
    • 12
      Affleck-Dine Leptogenesis from Higgs Inflation
      Speaker: Neil Barrie
    • 10:00 PM
      Break
    • 13
      PBH clustering in AD baryogenesis
      Speaker: Kawasaki
    • 14
      Gravitational Wave Signals of Affleck-Dine Baryogenesis
      Speaker: Lauren Pearce
    • 15
      Affleck-Dine Baryogenesis with Observable Neutron-Anti-Neutron Oscillation
      Speaker: Nobuchika Okada
    • 16
      The cosmological collider as a probe of leptogenesis
      Speaker: Yanou Cui
    • 2:30 AM
      Discussion
    • 17
      Leptoflavorgenesis: baryon asymmetry of the Universe from lepton flavor violation

      Charged-lepton flavor violation (CLFV) is a smoking-gun signature of physics beyond the Standard Model. The discovery of CLFV in upcoming experiments would indicate that CLFV processes must have been efficient in the early Universe at relatively low temperatures. We have pointed out that such efficient CLFV interactions open up new ways of creating the baryon asymmetry of the Universe. In this talk, I will describe two scenarios of what we call leptoflavorgenesis, where efficient CLFV processes are responsible for the generation of primordial lepton flavor asymmetries that are subsequently converted to a baryon asymmetry by weak sphaleron processes.

      Speaker: Masaki Yamada
    • 18
      Predicting the PBH mass spectrum
      Speaker: Misao Sasaki
    • 19
      The poltergeist mechanism
      Speaker: Kaz Kohri
    • 10:00 PM
      Break
    • 20
      Was There an Electroweak Phase Transition? (Cancelled)
      Speaker: Michael Ramsey-Musolf
    • 21
      Fermion asymmetries and dark matter in the form of primordial black holes
      Speaker: Marcos M. Flores
    • 22
      Gravitational Wave Probes of Axion Rotations Responsible for Dark Matter and Baryon Asymmetry

      We established a paradigm where the (QCD) axion’s novel cosmological evolution, a rotation in the field space, gives rise to dark matter and the baryon asymmetry. The axion rotations also provide a natural origin for a kination era, where the total energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination. We investigate the effects of this cosmological scenario on the spectrum of possible primordial gravitational waves from inflation or cosmic strings and find that the spectrum features a triangular peak. As a result, future gravitational wave observations can probe the viable parameter space of kination, including regions that produce axion dark matter by the kinetic misalignment mechanism or the baryon asymmetry by axiogenesis.

      Speaker: Raymond Co
    • 23
      Baryogenesis from $SU(2)_R$ phase transition
      Speaker: Isaac Wang
    • 2:30 AM
      Discussion