Beyond-two-point Statistics Meet Survey Systematics

16 Sept 2025, 00:00 → 19 Sept 2025, 20:00 Asia/Tokyo

Lecture Hall, 1F (Kavli IPMU)

Leander Thiele (Kavli IPMU), Linda Blot (Kavli IPMU), Nhat Minh Nguyen (Kavli IPMU)

Date

September 16-19, 2025

Venue

Kavli IPMU, Kashiwa, Chiba, Japan

Overview

A growing community in large-scale-structure (LSS) surveys is pushing cosmological analysis beyond the standard two-point (2pt) statistics, i.e. the spatial or angular correlation between two points mapped by the survey(s). Beyond-2pt statistics are expected to maximize the potential of both large-scale structure and cosmic microwave background surveys, plus their synergies. Recently, they have been proven to improve our odds to detect new physics---including but not limited to the tension in structure growth, the sum of neutrino mass and the non-Gaussianities in the Universe initial conditions.

Recent studies and demonstrations are largely limited to simulation data free of survey systematics, or subset(s) of data from past surveys whose limited precisions mitigated the impact of survey systematics. With the combination of high precision data from ongoing/upcoming surveys and high statistical power of the beyond-2pt statistics, such systematics (and treatments thereof) will be essential in our interpretation of the results. In fact, understanding and validating the impact(s) of these systematics on beyond-2pt statistics is a key step for the community to trust results from beyond-2pt analyses.

This workshop aims to initialize the first step in that direction. It targets both experts in beyond-2pt statistics and those in survey systematics. Here, survey systematics are broadly defined as those associated with telescope/detector operations and measurements, for both photometric and spectroscopic, wide- and deep-field LSS surveys.

Our main goal is to coordinate a plan between the two communities to make the modeling of (and validation against) survey systematics a standard procedure in beyond-2pt analyses. The expected outcome is a white paper summarizing our plan of action. The tentative format of the workshop is 4-6 talks per day, each followed by a group discussion session. We further plan a poster session during the workshop and a few astro/cosmo seminars at IPMU the weeks before and after this workshop.

Registration

Registration was closed on May 30, 2025.

Confirmed Speakers

Chihway Chiang (UChicago)

Yi-Kuan Chiang (ASIAA)

ChangHoon Hahn (UArizona)

Tanveer Karim (UToronto)

Hironao Miyatake (Nagoya University)

Ilaria Risso (INAF OAB, INFN Genova)

Sunao Sugiyama (UPennsylvania)

Tomomi Sunayama (ASIAA)

Scientific Organizing Committee (SOC)

Jia Liu, Masahiro Takada, Elisabeth Krause, Hee-Jong Seo, Bhuvnesh Jain

Local Organizing committee (LOC)

Nhat-Minh Nguyen (chair),  Linda Blot (co-chair), Leander Thiele (co-chair), Joaquin Armijo, Jingjing Shi, Sherry Song, Kevin McCarthy, Jess Cowell, Ryo Terasawa, Jiaxi Yu

DEI coordinators

Nhat-Minh Nguyen, Linda Blot, Jinjing Shi, Leander Thiele, Jess Cowell

Contact

Email:

beyond2pt.systematics@gmail.com

Adress:

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

Tuesday 16 September

09:00 → 09:30 Reception

09:30 → 09:45 Welcome, Program + Logistics, Safety

Conveners: Nhat Minh Nguyen (Kavli IPMU), Saeko Hayashi (Kavli IPMU)

09:45 → 10:10 ChangHoon Hahn - Overview of beyond-2pt statistics

10:10 → 10:35 Chihway Chang - Overview of photometric surveys and systematics

10:35 → 10:50 Coffee break

10:50 → 11:15 Ilaria Risso - Overview of spectroscopic surveys and systematics

11:15 → 12:00 Panel discussion

Convener: Nhat Minh Nguyen (Kavli IPMU)

12:00 → 13:30 Lunch

13:30 → 13:50 Sunao Sugiyama

13:50 → 14:10 Yin Li

14:10 → 14:30 Benjamin Giblin

14:30 → 14:40 Lina Castiblanco

14:40 → 14:50 Supranta Boruah

14:50 → 15:00 Alan Zhou

15:00 → 15:30 Coffee (IPMU Tea Time)

15:40 → 15:50 Jessica Cowell

15:50 → 16:00 Léa Harscouët

16:00 → 16:30 Panel discussion

Convener: Joaquin Armijo (Kavli IPMU)

16:30 → 17:00 Poster session

Wednesday 17 September

09:15 → 09:30 Coffee

09:30 → 09:50 Hironao Miyatake

09:50 → 10:10 Tanveer Karim

10:10 → 10:30 Eduardo Rozo

10:30 → 10:45 Coffee

10:45 → 10:55 Qianjun Hang

10:55 → 11:05 Maximilian von Wietersheim-Kramsta

11:05 → 11:15 Taisei Terawaki

11:15 → 11:25 Ryo Terasawa

11:25 → 11:35 Biwei Dai

11:35 → 12:05 Panel discussion

Convener: Jingjing Shi

12:05 → 13:30 Lunch

13:30 → 13:50 Andres Salcedo

13:50 → 14:10 Enrique Paillas

14:10 → 14:30 Shivam Pandey

14:30 → 14:40 Jiamin Hou

14:40 → 14:50 Gerogios Valogiannis

14:50 → 15:00 Bernhard Vos

15:00 → 15:30 Coffee (IPMU Tea Time)

15:40 → 15:50 Roger de Belsunce

15:50 → 16:00 Claire Lamman

16:00 → 16:30 Panel discussion

Convener: Nhat Minh Nguyen (Kavli IPMU)

16:30 → 17:00 Poster session

Thursday 18 September

09:15 → 09:30 Coffee

09:30 → 09:50 Tomomi Sunayama

09:50 → 10:10 Yi-Kuan Chiang

10:10 → 10:30 Pierluigi Monaco

10:30 → 10:45 Coffee

10:45 → 10:55 Jingjing Shi

10:55 → 11:05 Federico Rizzo

11:05 → 11:15 Kevin McCarthy

11:15 → 11:25 Alberto Rosado-Marin

11:25 → 11:35 Shengyu He

11:35 → 12:05 Panel discussion

Convener: Linda Blot (Kavli IPMU)

12:05 → 13:30 Lunch

13:30 → 14:00 Planning for break-out: A

14:00 → 15:00 Break-out Session: A - I

15:00 → 15:30 Coffee (IPMU Tea Time)

15:40 → 16:20 Break-out Session: A - II

16:20 → 17:00 Break-out Session: Summary A

Convener: Leander Thiele (Kavli IPMU)

Friday 19 September

09:15 → 09:30 Coffee

09:30 → 09:50 Planning for break-out: B

09:50 → 10:20 Break-out Session: B - I

10:20 → 10:35 Coffee

10:35 → 12:00 Break-out Session: B - II

12:00 → 13:30 Lunch

13:30 → 14:00 Break-out Session: Summary B

Convener: Linda Blot (Kavli IPMU)

14:00 → 14:30 Follow-up discussions + Planning for follow-up works

14:30 → 15:00 Summary + Closing

Convener: Nhat Minh Nguyen (Kavli IPMU)

15:00 → 15:30 Coffee (IPMU Tea Time)