JUNO EU+AM Meeting

7 Oct 2025, 09:00 → 10 Oct 2025, 20:00 Europe/Berlin

University of Hamburg, Campus Bahrenfeld (DESY)

Andrea Bremer (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), Caren Hagner (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), Daniel Bick (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), John Barre (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

The autumn 2025 JUNO EU+AM meeting will take place at the University of Hamburg October 08 to 10 2025 (Wednesday through Friday). It will be preceeded by the annual meeting of the German DFG research unit on Tuesday, October 07.

The meeting venue will be at Campus Bahrenfeld (DESY Campus).

Tuesday 7 October

German DFG Research Unit Retreat: Welcome and Overview

Conveners: Caren Hagner (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), Daniel Bick (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

1 Weclome

Speakers: Caren Hagner (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), Daniel Bick (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

JUNO_DFG_HH_2025.pdf

2 Status of the German JUNO DFG research unit

Speaker: Tobias Lachenmaier (Universität Tübinen)

German DFG Research Unit Retreat: Individual Talks

Convener: Caren Hagner (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

3 The AURORA laser calibration system

Speaker: Marcel Büchner (JGU Mainz)

4 OMILREC nPE map cross check

Speaker: Thilo Birkenfeld (RWTH Aachen)

5 Preliminary updates on muon induced neutron backgrounds from JUNO data

Speaker: Meishu Lu (TUM)

10:30 Coffee Break

German DFG Research Unit Retreat Lecture

6 ESSnuSB+

Speaker: Tamer Abdelkmaksoud Mohamed Tolba (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

ESSnuSB_TTolba_07102025.pdf

ESSnuSB_TTolba_07102025.pptx

12:00 Lunch

German DFG Research Unit Retreat: Individual Talks

Convener: Tobias Lachenmaier (Universität Tübinen)

7 Overview of ongoing efforts at GSI group

Speaker: Rosmarie Wirth

8 TTR current status

Speaker: Mikhail Smirnov (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

9 Reconstruction of atmospheric neutrino using Machine Learning

Speaker: Milo Jacques Yoshitaka Charavet (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

10 Background Study for Distant CCSN

Speaker: Tobias Kramer (RWTH Aachen)

11 Status Update about MC Studies for the DSNB Search

Speaker: Matthias Mayer (TUM)

12 Combined Sensitivity of JUNO and Super-K to the Black Hole Fraction

Speaker: Tim Charisse

13 Indirect Dark Matter Search in JUNO

Speaker: Jessica Eck (Universität Tübinen)

14 Preliminary results on proton and carbon quenching from UniKaon

Speaker: Ulrike Fahrendholz (TUM)

15:30 Coffee Break

German DFG Research Unit Retreat: Status and Future of OSIRIS

Convener: Michael Wurm (Universität Mainz)

15 Status of the OSIRIS MC Simulation

Speaker: Lukas Bieger (Universität Tübinen)

16 Event Reconstruction in OSIRIS and JUNO

Speaker: Elisabeth Neuerburg (RWTH Aachen)

17 Muon Reconstruction in the JUNO pre-Detector OSIRIS

Speaker: Marcel Büchner (JGU Mainz)

18 Alpha beta discrimination in OSIRIS

Speaker: Martin Kandeln (RWTH Aachen)

19 OSIRIS DAQ and single event fits

Speaker: Arshak Jafar (JGU Mainz)

20 Future of OSIRIS, publications

Speaker: Michael Wurm (Universität Mainz)

Social Event: German DFG Research Unit Dinner

Wednesday 8 October

08:30 Welcome Coffee and Registration

Country and Status Reports

21 Welcome

Speakers: Caren Hagner (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik)), Daniel Bick (UNI/EXP (Uni Hamburg, Institut fur Experimentalphysik))

JUNO_EU_AM_HH_2025.pdf

22 Country Report Americas

Speaker: Pedro Ochoa-Ricoux (University of California, Irvine)

23 Country Report Armenia

Speaker: Ara Ioannisian

24 Country Report Belgium

Speaker: Barbara Clerbaux (UNIVERSITE LIBRE DE BRUXELLES)

25 Country Report Czech Republic

Speaker: Vit Vorobel

26 Country Report Finland

Speaker: Kai Loo (University of Jyvaskyla, Finland)

27 Country Report France

Speaker: Cécile Jollet

28 Country Report Germany

Speaker: Tobias Lachenmaier (Universität Tübinen)

29 Country Report Italy

Speaker: Gioacchino Ranucci (INFN Milano)

30 Country Report MSU & INR

31 Country Report JINR

Speaker: Maxim Gonchar (JINR)

32 Country Report Slovakia

Speaker: Fedor Šimkovic

33 Country Report UK

Speaker: Xianguo Lu (University of Warwick)

12:00 Lunch

Country and Status Reports

34 JUNO DCI and computing resources status

Speaker: Giuseppe Andronico (INFN Sez. CT)

First JUNO analysis: Summaries

35 Introduction

Speaker: Pedro Ochoa-Ricoux (University of California, Irvine)

36 Unoscillated spectrum prediction

Speaker: Matteo Borghesi

37 Detector response and calibration

Speakers: Davide Basilico, Marco Malabarba

38 Reconstruction

Speakers: Luca Pelicci, Thilo Birkenfeld

15:15 Coffee Break

First JUNO analysis: Reports from the WP Conveners, Discussion

39 Fit and statistical machinery

Speakers: Andrea Serafini (University of Padova & INFN), Sindhujha Kumaran (UCI)

40 Muon tagging using TT

Speaker: Thomas Raymond (IPHC/CNRS/IN2P3)

41 Backgrounds predicted analytically/using MC

Speakers: Mariam Rifai, Ze Chen

42 Muon tagging + IBD selection + data-driven backgrounds

Speakers: Cristobal Morales, Vanessa Cerrone

PI Discussion

Social Event: St. Pauli Tour

43 St. Pauli Quickie

JUNO_EU_AM_HH_2025_Bus_Tour.pdf

Social Event: Senior Dinner

Social Event: Young Scientists Dinner

Thursday 9 October

First JUNO analysis: Guided topical discussion #1 (Reco & external inputs for backgrounds)

44 Reco: Decision on OMILREC; Muon track reco (CD+WP; TT inclusion decision)

45 Missing tiles for backgrounds external inputs (geo, atmo mainly)

10:00 Coffee Break

First JUNO analysis: Guided topical discussion #2 (Detector response)

46 Modeling γ‑source energy spectra (Source spectra modeling details and systematics; implications for calibration and fit, pileup)

47 Muons and muon vetoes (Do our cuts make sense?)

Free discussion and hands-on work

12:00 Lunch

First JUNO analysis: Guided topical discussion #3 (Fit, selection & detector response)

48 Response model to extract NL (e+ vs γ) (Choice/discussion of response model for NL; trade‑offs, validation handles; Cherenkov)

49 IBD cuts efficiency estimation (priority) & optimization

50 JUNO fit inputs: spectrum prediction & JUNO response modelling in the fit (unoscillated spectrum shape, NL, pileup, resolution, energy leakage parameterization in the fit)

15:00 Coffee Break

First JUNO analysis: Guided topical discussion #3 (Daya Bay model and fit)

51 DYB model & detector response in the fit (flux parameterization discussion and strategy in the fit)

Free discussion and hands-on work

Social Event: Social Dinner: Boat Cruise

52 Cruise On Hamburger Deern

JUNO_EU_AM_HH_2025_Boat_Tour.pdf

Friday 10 October

Hardware Updates

53 TT: End of installation & remaining electronics work

Speaker: Jacques WURTZ (IPHC-IN2P3)

54 TT DAQ & planned evolution

Speaker: Denis Krobalev

55 Top Tracker Status

Speaker: Aurélie Bonhomme (DPhN/IRFU/CEA-Saclay)

56 Status of the SPMTs

Speaker: Jonas Buchholz

57 Status of OSIRIS

Speaker: Michael Wurm (Universität Mainz)

58 Status of the TAO installation and commissioning

Speaker: Fabrizio Petrucci

10:30 Coffee Break

First JUNO analysis: Guided topical discussion #4 (Systematics, Muons & cosmogenics)

59 LiHe and other cosmogenics

60 Systematics discussion

12:30 Lunch

Free discussion and hands-on work: Drafting of technotes

Closing session