4th LISA Cosmology Working Group Workshop

16 Oct 2017, 09:30 → 20 Oct 2017, 16:00 Europe/Berlin

02.430 (Mainz Institute for Theoretical Physics, Johannes Gutenberg University)

This is the 4th LISA Cosmology Working Group Workshop. After the selection of the LISA mission by ESA following the call for mission in autumn 2016, and the end of ESA design study in summer 2017, the configuration of the LISA interferometer is substantially fixed. It is therefore time to precisely assess the capability of the new LISA configuration to test different aspects of cosmology and fundamental physics. Moreover, the community must start to dwell on new issues connected with data analysis techniques and with the needs of the LISA Consortium to address ESA requests. The goal of the present workshop is to obtain concrete results in this respect, therefore, it will be dedicated mostly to collaborative work in teams, accompanied by a few seminars on new results.

The workshop will cover the following main topics:

• First order phase transitions
• Detection of stochastic backgrounds
• Topological defects
• Standard sirens
• Testing General Relativity
• Inflation and beyond
• Primordial black holes and dark matter
• Structure formation

Executive Summary (PDF) Lisa6.pdf

Participants (PDF) LISA_List_INDICO_2017-10-10.pdf

Monday 16 October

09:30 → 10:00 Coffee

10:00 → 10:15 Welcome

Convener: Prof. Matthias Neubert (Johannes Gutenberg University Mainz)

10:15 → 12:30 Update on LISA, Discussions, Structure of the Workshop

Convener: Germano Nardini

10:15 Presentation of the workshop and program discussion

10:30 Status of LISA

Speaker: Martin Hewitson

Slides Hewitson_LISA_status_CosWorkshop.pdf

11:00 Sensitivity curve

Speaker: Antoine Petiteau

Slides Petiteau_LISASensitivity_LISACosmoWG_1710_OK.pdf

11:30 Discussion: organisation of the Consortium, CosWG, milestones

14:00 → 16:00 Phase Tansitions I

Convener: Thomas Konstandin

14:00 Electroweak bubble wall speed limit

Speaker: Guy Moore (TU Darmstadt)

Slides Moore_run_30min.pdf

14:40 Runaway discussion, update of CosWG document

Speaker: Jonathan Kozakzuk

Slides Kozaczuk_Bubble_wall_speed_limit_discussion.pdf

15:00 Vacuum Transitions

Speaker: Daniel Cutting

Slides Cutting_SimulatingVacuumPhaseTransition.pdf

15:30 Models & LHC complementarity

Speaker: Jose Miguel No

Slides LISA_LHC_CosmoWG_Mainz-1.pdf

16:00 → 16:30 Coffee

16:30 → 18:00 Topological Defects

Convener: Daniele Steer

16:30 GWs from field theory simulations

Speakers: Daniel Figueroa, Mark Hindmarsh

Slides Hindmarsh_netmovie512_001_0020.jpeg

17:00 Latest on NG simulations + constraints

Speakers: Daniele Steer, Maria Sakellariadou

Slides Sakellariadou_Mainz-CS.pdf

17:30 “Free-parameter" constraints

Speaker: Sotiris Sanidas

Slides Sanidas_LISACosWG_Mainz_2017_sanidas.pdf

18:00 → 19:00 Welcome drink (Celebration of Nobel Prize for GWs, and possibly a new type of merger announced earlier today?)

Tuesday 17 October

09:30 → 10:00 Coffee

10:00 → 12:30 Phase Transitions II

Convener: Pedro Schwaller (JGU Mainz)

10:00 Spectra - Introduction

10:10 Turbulence and Hubble damping

Speaker: Chiara Caprini

11:00 Sound Shell Model

Speaker: Marc Hindmarsh

Slides Hindmarsh_LCWG_Mainz_1710_MBH.pdf

11:20 Some new simulation results

Speaker: Thomas Konstandin

Slides Konstandin_seminar.pdf

11:40 Spectra - Discussion

14:00 → 15:00 Probing BSM in astrophysics with GWs

Convener: Valerie Domcke

14:00 Constraints on axion-like particles with LIGO and LISA

Speaker: Enrico Barausse

Slides barausse_mainz.pdf

14:30 Discussion

15:00 → 16:00 Discussion of LIGO papers

16:00 → 16:30 Coffee

16:30 → 18:40 Inflation

Convener: Daniel Figueroa

16:30 LISA and inflation

Speaker: A. Ricciardone

Slides Ricciardone_LISA_Inflation_Mainz.pdf

16:50 Broken isometries in inflation

Speaker: G. Tasinato

Slides Tasinato-Inflation.pdf

17:20 PBHs from inflation

Speaker: J. Garcia-Bellido

17:50 Some extra infos

Speaker: M. Peloso

Wednesday 18 October

09:30 → 10:00 Coffee

10:00 → 10:45 Discussion on Work Packages

10:45 → 11:50 Data processing & data challenges, detection of a SGWB

Conveners: Antoine Petiteau, Stas Babak

10:45 Data processing centre

Speakers: Antoine Petiteau, Stanislav Babak

11:15 LISA data challenges

Speakers: Antoine Petiteau, Stanislav Babak

Slides Babak_LDC_Mainz.pdf

13:00 → 14:00 PRISMA Colloquium by Raphael Flauger (Lorentz-Raum 05-127, Staudingerweg 7)

14:00 → 15:00 Data processing & data challenges, detection of a SGWB II

14:00 SGWB via frequency bins

Speaker: Germano Nardini

Slides coswg.pdf

14:20 A COSMOMC-like proposal

Speaker: Mark Hindmarsh

14:40 Chirality at Earth-based interferometers

Speaker: Marco Peloso

15:00 → 16:00 Illustrative and explicit example of stochastic background reconstruction

Conveners: Antoine Petiteau, Stanislav Babak

slides Babak_CGW_Mainz.pdf

16:00 → 16:30 Coffee: & free discussion

16:30 → 18:00 Standard Sirens

Convener: Chiara Caprini

16:30 Standard sirens at LISA

Speaker: Nicola Tamanini

Slides Tamanini_Talk.pdf

16:55 How MBHB are formed and their counterparts

Speaker: Enrico Barausse

Slides Barausse_mainz_sirens.pdf

17:20 Method without counterpart

Speaker: Antoine Petiteau

17:40 Discussion: measurement of H0 and what's next

Thursday 19 October

09:30 → 10:00 Coffee

10:00 → 12:30 Modified GR and Cosmology

Convener: Diego Blas

10:00 Overview of the topic

Speaker: D. Blas

10:30 GW170817

Speaker: M. Sakellariadou

Slides LISA-COSMO-ms.pdf

10:50 Theories of gravity after GW170817

Speaker: G. Tasinato

Slides Tasinato-ModifiedGravity.pdf

11:20 Discussion

14:00 → 16:00 Primordial Black Holes

Convener: Marco Peloso

14:00 Phenomenological aspects of PBHs

Speaker: J. Garcia-Bellido

Slides LISA_MITP_JGB.pdf

14:40 Phenomenology associated to second-order GWs

Speaker: M. Peloso

Slides peloso_talk.key.pdf

15:00 Further phenomenological aspects of inflation

Speaker: M. Pieroni

Slides Slides.pdf

15:20 Other GW experimetns and their connection to inflation

Speaker: R. Flauger

16:00 → 16:30 Coffee

16:30 → 18:00 Work on Projects

Friday 20 October

09:30 → 10:00 Coffee

10:00 → 11:30 Discussion on CosWG

Convener: Germano Nardini

10:00 Financial resources

Speaker: M. Hindmarsh + A. Tranberg

10:30 Next CosWG workshop

Speaker: Mark Hindmarsh

10:50 Improving the CosWG and the interaction with the other WGs (Discussion)

Speaker: Germano Nardini

11:30 → 12:30 Work on Projects

14:00 → 15:30 Work on Projects

15:30 → 16:00 Coffee: Goodbye coffee