Pion-only, chiral light-front model of the deuteron

Abstract

We investigate the symptoms of broken rotational invariance, caused by the use of light front dynamics, for deuterons obtained using one- and two-pion-exchange potentials. A large mass splitting between states with m=0 and m=1 is found for the deuteron obtained from the one-pion-exchange (OPE) potential. The size of the splitting is smaller when the chiral two-pion-exchange (TPE) potential is used. When the TPE potential constructed without chiral symmetry is used, the deuteron becomes unbound. These results arise from significant relativistic effects which are much larger than those of the Wick-Cutkosky model because of the presence of the tensor force.Comment: 5 pages, 1 figure, REVTeX4 (style files included

Pionic and hidden-color, six-quark contributions to the deuteronb1structure function

“…That the one-pion exchange potential OPEP gives a tensor force of paramount importance in deuteron physics is a nuclear physics textbook item [12]. Indeed, realistic deuteron wave functions can be constructed using only the OPEP along with a suitable cutoff at short distances [13][14][15][16]. Therefore it is reasonable to estimate the size of such pionic effects.…”

Discovery vs. Precision in Nuclear Physics- A Tale of Three Scales

“…This has been known since the discovery of the quadrupole moment of the deuteron in 1939. Furthermore, the OPEP by itself, along with a single parameter that provides a shortdistance cutoff, is known to provide an approximate but reasonable bound state wave function for the deuteron [53,54].…”