14,562 research outputs found
Deuteron Magnetic Quadrupole Moment From Chiral Effective Field Theory
We calculate the magnetic quadrupole moment (MQM) of the deuteron at leading
order in the systematic expansion provided by chiral effective field theory. We
take into account parity and time-reversal violation which, at the quark-gluon
level, results from the QCD vacuum angle and dimension-six operators that
originate from physics beyond the Standard Model. We show that the deuteron MQM
can be expressed in terms of five low-energy constants that appear in the
parity- and time-reversal-violating nuclear potential and electromagnetic
current, four of which also contribute to the electric dipole moments of light
nuclei. We conclude that the deuteron MQM has an enhanced sensitivity to the
QCD vacuum angle and that its measurement would be complementary to the
proposed measurements of light-nuclear EDMs
Valence bond glass on an fcc lattice in the double perovskite Ba2YMoO6
Peer reviewedPublisher PD
Parity- and Time-Reversal-Violating Form Factors of the Deuteron
We calculate the electric-dipole and magnetic-quadrupole form factors of the
deuteron that arise as a low-energy manifestation of parity and time-reversal
violation in quark-gluon interactions of effective dimension four and six: the
QCD vacuum angle, the quark electric and chromo-electric dipole moments, and
the gluon chromo-electric dipole moment. Within the framework of two-flavor
chiral perturbation theory, we show that the relative sizes of the
corresponding moments allow an identification of the symmetry-breaking source
- …