Updates on UK Nuclear Community Meeting & 2024 Roadmap Recommendations

UK Nuclear Community Meeting 9 January 2025 NP Advisory Panel Update Report David Sharp NPAP

Outline NPAP membership Roadmap Next steps European Strategy for Particle Physics 2

Membership of NPAP David Sharp Rachel Montgomery Philippos Papadakis Paul Stevenson University of Manchester University of Glasgow STFC University of Surrey Call for new members will be opened in April. This will include openings for 4 new ordinary members (nuclear astro, theory, hadron/RHIC, instrumentation/applications). 3

2024 Nuclear Physics Roadmap Completed roadmap has now been published online https://www.ukri.org/wp-content/uploads/2012/10/STFC-041224-NPAP-STFC-Roadmap-2024.pdf Culmination of over 18 months work. Resulted in high-level recommendations to STFC. Broad overview of subject. 10-year roadmap and project prioritisation. Submitted to SB along with SWOT analysis. 4

2024 Nuclear Physics Roadmap High-Level Recommendations: The UK Nuclear Physics community should be supported to continue to pursue world-leading experimental and theoretical nuclear physics programmes focused on high-priority science questions; STFC consolidated-grant and pipeline funding for skills and technology are critical to future success. STFC should support international projects in nuclear and hadronic physics that may capitalise on previous investments via upgrades or seize new opportunities, and that maximise high-quality science output and UK leadership. Novel funding solutions should be found to support capacity building within nuclear theory to support the fundamental science and UK PLC needs. Early R&D support should be enhanced to enable and to de-risk novel technology required to support the next generation of experiments and theoretical initiatives. STFC should assist the community in furthering experimental and theoretical efforts in applied nuclear physics, acting as a champion to help bridge cross council gaps, weave UKRI partnerships and source funding to address societal challenges using expertise gained from fundamental science and to maintain sovereign capability for the UK in the nuclear area. 5

2024 Nuclear Physics Roadmap Prioritisation process By 1 May 2024, NPAP received 36 contributions to the 10-year prioritisation plan demonstrating an ambitious community vision with a very high potential for building a streamlined set of projects to become a part of the Roadmap. A series of community meetings were held on 8 May (hybrid, 64 participants), 15 May (online, 43 participants), and 22 May (online, 38 participants). Analysis, streamlining, and prioritisation of the now 22 contributions were performed in three subject areas and discussed within the following Working Groups who then assigned a priority (Top/High/Medium): 1) Nuclear structure and nuclear astrophysics (Chair: Dave Joss). 2) Hadron physics (Chair: Bjoern Seitz). 3) General interest (Chair: Carl Wheldon). WG1 made use of subset of NPGP for rankings due to large number of proposals and conflicts within WG and NPAP leads. 6

2024 Nuclear Physics Roadmap 10-year Plan Recommendations: A Proposals within the core STFC PPAN programme remit Costs ( M) 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 A.Structure A.Hadron Prioritised nuclear structure and astrophysics proposals A.Structure.1 Top priority - Low-energy physics at the limits of stability 4.0 A.Structure.2 Top priority - TRISTAN@ISOLDE A.Structure.3 High priority - Total Absorption Spectrometer A.Structure.4 High priority - Studies of heavy elements A.Structure.5 High priority - Ab initio nuclear theory A.Structure.6 High priority - Nuclear Structure and Dynamics A.Structure.7 High priority - FAIR Low Energy A.Structure.8 Medium priority - FRIB Upgrade A.Structure.9 Medium priority - Proton-rich nuclei at the limits Prioritised hadron physics proposals 6.0 5.5 5.5 1.0 1.0 5.0 6.0 2.0 A.Hadron.1 A.Hadron.2 A.Hadron.3 Prioritised general community-interest proposals Top priority - JLAB Future High priority - Hadron Physics at AMBER Medium priority - ELSA@Bonn 5.0 0.2 0.2 A.General A.General.1 A.General.2 A.General.3 Medium priority - UK centre for quantum entanglement High priority - Photon spallation source Medium priority - 160Gd double beta decay 0.7 7.0 2.7 7

2024 Nuclear Physics Roadmap 10-year Plan Recommendations: B Aspirational proposals and new-initiative Costs ( M) 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 B.Structure B.Hadron B.General Prioritised nuclear structure and astrophysics proposals B.Structure.1 High priority - HRS@R3B Prioritised hadron physics proposals R&D B.Hadron.1 Prioritised general community-interest proposals Top priority - ALICE3 B.General.1 B.General.2 B.General.3 B.General.4 B.General.5 B.General.6 Top priority - Nuclear Theory Centre Top priority - Nuclear Astrophysics Centre Top priority - Accelerated Beams Facility (ABRA) High priority - UK Centre for Nuclear Data High priority - UK Centre for Nuclear Applications Medium priority - Reactor neutrino flux 8

Next steps Dialogue with STFC Further discussions needed with STFC as to how prioritisation will be used in submission process to PPRP in assessing proposals. Expectations for NPAP in terms of prioritisation/SOI submission. How will NP roadmap be represented in SB roadmap. Ongoing review of proposals Important to maintain dialogue within the community and with STFC to keep roadmap up-to-date and review new opportunities. Aspirational plans need continued dialogue to identify potential opportunities/solutions. NPAP-led community meetings will provide a forum for review. 9

European Strategy for Particle Physics ESPP submission deadline March 2025 ESPP essentially dictates the future strategy for CERN. This impacts on UK NP through ISOLDE, n_ToF, NA, ALICE users. Specific questions regarding physics beyond colliders and nuclear and astroparticle physics at CERN that need addressing as part of UK submission. Drafting meeting taking place at UCL today. NPAP will draft a submission to this covering UK NP at CERN and circulate to community for input. 10

Thank you 11