The outlook for Nuclear Theory

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					The outlook for Nuclear Theory

              Niels Walet
   School of Physics and Astronomy
      University of Manchester
“Nuclear theory in the UK is a
small but first class effort, with
high international visibility ...”

                         I NTE R NATI O NAL
What is Nuclear Theory

Internationally rather broadly defined: The study of
 the theory of those aspects of (sub)nuclear physics
 that involve multiple interacting objects…
In UK historically rather narrowly defined (EPSRC
Theoretical Nuclear Physics: UK
Only two University Groups with full-time NP theorists:

Manchester 4 FTE academics [Birse, Bishop, McGovern, Walet]
1+1 PDRA, 1PGR student
       Nuclear Structures
Field Theoretic approaches to many-body systems
       Effective field theories
Quarks and gluons

Surrey 4 FTE Academics [Al-Khalili, Oi, Stevenson, Tostevin]
1 Advanced Fellow [Zhao], 1 Emeritus [Johnson] 1+1 PDRA, 13 PGR
Nuclear reactions and dynamics
Nuclear dynamics and structure
Others (HEP=Nuclear?)

Edinburgh/Glasgow/Liverpool/....: Lattice QCD
Manchester Particle Theory
Probably rather thin in nuclear areas?
Interface to Astrophysics

 Equation(s) of State
 Nucleosynthesis

There is clear theory interest in one (neutron and
  quark stars).
Less theory contribution on second, apart from
  through standard nuclear experiment support.
Not as strong as to PP!
Intenational setting:

NUPECC recommends that           It is imperative to:
  efforts should be              ….
  undertaken to strengthen       Significantly increase funding
  local theory groups in order        for nuclear theory which
  to guarantee the theory             is essential for developing
  development needed to               the full potential of the
  address the challenging             programme
  basic issues that exist or
  may arise from new             (NSAC 2002)
  experimental observations.
(NUPECC, 2004)
US effort

   Theory needs to be reinforced
   Structure
       RIA TG (defunct)
       SciDAC-2 collaboration: UNEDF
       JUSTIPEN
   NSAC long range plan 2007 under way;
    concentrates on facilities, but debates theory:
   See next couple of slides
Low Energy
   How do NN and NNN interaction emerge from QCD?
   How do NNN forces impact structure and reaction properties of
   What are the limits of stability?
   How does shell structure evolve with neutron number?
   How do simple symmetries arise in complex system?
   What is the impact of the continuum on nuclear properties?
   Can we describe large-amplitude collective motion?
   What is the microscopic underpinning of emergent phenomena?
   How do nuclei react with each other?
   What is the equation of state (EOS) of nuclear and neutron matter?
   What can nuclei tell us about other systems?

 More effort, less specific targets (two white

    RHIC, LHC, EIC: Theory/models for QCD in
    chiral PT
    Effective field theory
    lattice QCD
    Hadron physics phenomenology
European Framework

   NUPECC Facility for theory: ECTstar in Trento
       Will STFC pay UK part?
   EU Networks (for experiment and theory)!
       Low-energy (Structure+reactions)
       Hadron
   Not as coherent for theory as US.
UK effort and future (low energy)

   Microscopic description of reactions (Surrey)
   Structure
       (effective) few body systems: Surrey
       EFT for few body systems: Manchester
       Fully microscopic calculations: Manchester
       Large Amplitude Collective Motion: Manchester,
       NNN forces: Manchester
   Can tick many of the US boxes?!
UK effort

   QCD Plasma
       A little in Manchester,
       some in other places (HEP)
   Effective Field Theory
       Manchester, Sussex, So'ton
   Lattice QCD
       UK QCD
   Hadron Phenomenology
       Surrey, Oxford, So'ton, Mc/er

Much of the existing work seems already well
 aligned with international goals!
Are we concentrating on strengths?
Must start stronger focus on FAIR physics
  Others (CBM)?
Collaboration with lattice QCD
Non-equilibrium QCD/Phase transitions

   Boundaries with PP theory are fluid
   Boundaries with Astrophysics important, but
    theory input mainly on nuclear physics relevant
   Some integration needed
   But substantial strength in core nuclear physics
    will help to address key questions
   Also, we must support FAIR type physics

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