Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-12-03
Phys.Rev. C66 (2002) 054003
Physics
Nuclear Physics
Nuclear Theory
16 pages, 1 figure, submitted to PRC
Scientific paper
10.1103/PhysRevC.66.054003
The ^3He(mu^-,nu_mu)^3H weak capture is studied using correlated-hyperspherical-harmonics wave functions, obtained from realistic Hamiltonians consisting of the Argonne $v_{14}$ or Argonne $v_{18}$ two-nucleon, and Tucson-Melbourne or Urbana-IX three-nucleon interactions. The nuclear weak charge and current operators have vector and axial-vector components that include one- and two-body contributions. The strength of the leading two-body operator in the axial-vector current is adjusted to reproduce the Gamow-Teller matrix element in tritium $\beta$-decay. The calculated total capture rate is in excellent agreement with the most recent experimental determination $1496\pm 4$ sec$^{-1}$, when the PCAC value is adopted for the induced pseudo-scalar coupling constant $g_{PS}$. The predictions for the capture rate and angular correlation parameters $A_v$, $A_t$, and $A_\Delta$ are found to be only very weakly dependent on the model input Hamiltonian. The variation of these observables with $g_{PS}$ and the theoretical uncertainties deriving from the model-dependent procedure used to constrain the axial current are investigated.
Kievsky Alejandro
Marcucci Laura Elisa
Rosati S.
Schiavilla Rocco
Viviani Michele
No associations
LandOfFree
Theoretical Study of the ^3He(mu^-,nu_mu)^3H Capture does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theoretical Study of the ^3He(mu^-,nu_mu)^3H Capture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical Study of the ^3He(mu^-,nu_mu)^3H Capture will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-479248