Oak Ridge Annual Nuclear Gathering Event

10 Dec 2025, 08:00 → 12 Dec 2025, 15:00 US/Eastern

Rooms 360-362 (Zeanah Engineering Complex)

The 2025 edition of the Oak Ridge Annual Nuclear Gathering Event (ORANGE 2025) will be held Dec. 10 - 12, 2025 at the University of Tennessee, Knoxville.

This workshop aims to provide an informal context for nuclear theory researchers to share progress on current projects, stimulating collaboration and new perspectives for the coming year. The workshop scope includes work on:

• effective field theories for nuclear forces;
• nuclear structure;
• nuclear reactions;
• fundamental interactions in nuclei;
• uncertainty quantification;
• quantum computing for nuclei;
• machine learning approaches for nuclei.

Participation of junior researchers is encouraged.

We thank the Joint Institute for Nuclear Physics and Applications for support for this workshop.

Wednesday 10 December

09:00 → 09:25 Registration

09:00 Registation

09:25 → 10:30 Morning session

09:25 Welcome and introduction

09:30 Power-counting many-body diagrams in the IMSRG

Speaker: Ragnar Stroberg

10:00 Large-Nc constraints on nucleon interactions

Speaker: Matthias Schindler

10:30 → 11:00 Coffee

11:00 → 12:00 Morning session

11:00 Quantum Computation

Speaker: Gautam Rupak

11:30 Proton- proton scattering on a quantum computer

Speaker: Ratna Khadka

12:00 → 13:00 Lunch

13:00 → 15:00 Afternoon session

13:00 Quantum Computing in Nuclear Physics

Speaker: Sanket Sharma (University of Tennessee Knoxville)

13:30 Equation of Motion (EOM) Extensions of the In-Medium Similarity Renormalization Group (IMSRG)

Speaker: Michael Gajdosik

14:00 Multi-reference equation of motion method

Speaker: Zhonghao Sun

14:30 Violation of Parity in the In Medium Similarity Renormalization Group

Speaker: Beatriz Romeo

15:00 → 15:30 Coffee

15:30 → 17:00 Afternoon session

15:30 Orbital removal via in-medium similarity renormalization group

Speaker: Brandon Lem

16:00 Discussion

Thursday 11 December

09:30 → 10:30 Morning session

09:30 Superallowed alpha decay of 104Te

Speaker: Robert Grzywacz

10:00 The role of SU(3) and SU(4) in beta decay

Speaker: Anna McCoy

10:30 → 11:00 Coffee

11:00 → 12:00 Morning session

11:00 Shape Mixing in an ab initio description of Be isotopes

Speaker: Daniel Lay

11:30 Path integral approaches to many-body systems

Speaker: Pranav Sharma

12:00 → 13:30 Lunch

13:30 → 15:00 Afternoon session

13:30 Coulomb corrections to three-nucleon electroweak form factors

Speaker: Ha Nguyen

14:00 Coulomb effects in Helium-3

Speaker: Xincheng Lin

14:30 Quantum Monte-Carlo Calculations of Neutron-alpha Scattering with Chiral Three-Body Forces

Speaker: Juan Silva

15:00 → 15:30 Coffee

15:30 → 17:00 Afternoon session

15:30 A field theory approach to artificial neural networks in nuclear physics

Speaker: Simon Sundberg

16:00 Discussion

Friday 12 December

09:30 → 10:30 Morning session

09:30 Non-Efimovian Halo Nuclei

Speaker: Lucas Platter

10:00 Coupled-cluster methods for deformed nuclei

Speaker: Gaute Hagen

10:30 → 11:00 Coffee

11:00 → 12:30 Morning session

11:00 Extrapolating many-body resonances: Toward the five-proton decay of 9N

Speaker: Nuwan Yapa

11:30 Ab initio Gamow density matrix renormalization group for broad nuclear many-body resonances

Speaker: Admir Sehovic

12:00 Closing remarks

12:30 → 13:30 Lunch