Dominant 2{pi}{gamma}-exchange nucleon-nucleon interaction: Spin-spin and tensor potentials

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.067001· OSTI ID:20864247

Kaiser, N ^[1]

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1. Physik Department T39, Technische Universitaet Muenchen, D-85747 Garching (Germany)

We calculate at two-loop order in chiral perturbation theory the electromagnetic corrections to the two-pion exchange nucleon-nucleon interaction that is generated by the isovector spin-flip {pi}{pi}NN contact-vertex proportional to the large low-energy constant c{sub 4}{approx_equal}3.4 GeV{sup -1}. We find that the respective 2{pi}{gamma}-exchange potentials contain sizable isospin-breaking components which reach up to -4% of corresponding isovector 2{pi}-exchange potentials. The typical values of these novel charge-independence breaking spin-spin and tensor potentials are -0.11 and 0.09 MeV, at a nucleon distance of r=m{sub {pi}}{sup -1}=1.4 fm. The charge-symmetry breaking spin-spin and tensor potentials come out a factor of 2.4 smaller. Our analytical results for these presumably dominant isospin-violating spin-spin and tensor NN-forces are in a form such that they can be easily implemented into phase-shift analyses and few-body calculations.

• OSTI ID: 20864247
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGE INDEPENDENCE
CHIRALITY
CORRECTIONS
DISTANCE
ISOSPIN
ISOVECTORS
MEV RANGE
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PERTURBATION THEORY
PHASE SHIFT
PIONS
POTENTIALS
SPIN
SPIN FLIP
SYMMETRY BREAKING