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

10 Jan 2022, 00:30 → 14 Jan 2022, 04:30 Asia/Tokyo

Online

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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Monday 10 January

1 High-temperature electroweak symmetry non-restoration and implications for baryogenesis

Speaker: Geraldine Servant

SERVANT IPMU2022.pdf

2 Baryogenesis via relativistic bubble expansion

Speaker: Iason Baldes

22:00 Break

3 GWs from metastable cosmic strings

Speaker: Valerie Domcke

IPMU_domcke_metastable_strings.pdf

4 Gravitational Wave Gastronomy

Speaker: David Dunsky

Gravitational_Wave_Gastronomy_Dunsky.pdf

Tuesday 11 January

5 Inflation in String theory and Supergravity

Speaker: Renata Kallosh

01:30 Discussion

6 Confronting GUTs with Proton Decay and Gravitational Waves

Speaker: Jessica Turner

NewObservationalWindows2022_Turner.pdf

7 Neutrinoless double beta decay and leptogenesis

Speaker: Silvia Pascoli

22:00 Break

8 Probing Baryogenesis

Speaker: Harz Julia

9 SO(10)-inspired leptogenesis

Speaker: Pasquale Di Bari

Pasquale pdb.pdf

Wednesday 12 January

10 Aspects of High Scale Leptogenesis with Low Energy CP Violation (Recent Results)

Speaker: Serguey Petcov

PetcovTSIPMU110122.pdf

01:30 Discussion

11 Field space geometry and Affleck-Dine Baryogengesis (cancelled)

Speaker: David Marsh

12 Affleck-Dine Leptogenesis from Higgs Inflation

Speaker: Neil Barrie

22:00 Break

13 PBH clustering in AD baryogenesis

Speaker: Kawasaki

14 Gravitational Wave Signals of Affleck-Dine Baryogenesis

Speaker: Lauren Pearce

Lauren Pearce AD_Qballs.pdf

Thursday 13 January

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

02:30 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

KazKohri20220113.pdf

22:00 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

Friday 14 January

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

02:30 Discussion