Chiral Effective Field Theory Predictions for Muon Capture on Deuteron and 3He

被引:97
作者
Marcucci, L. E. [1 ,2 ]
Kievsky, A. [2 ]
Rosati, S. [1 ]
Schiavilla, R. [3 ,4 ]
Viviani, M. [2 ]
机构
[1] Univ Pisa, Dept Phys, I-56127 Pisa, Italy
[2] INFN Pisa, I-56127 Pisa, Italy
[3] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA
[4] Jefferson Lab, Newport News, VA 23606 USA
关键词
SCATTERING; NUCLEON; PHYSICS;
D O I
10.1103/PhysRevLett.108.052502
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The muon-capture reactions H-2(mu(-), nu(mu))nn and He-3(mu(-), nu(mu))H-3 are studied with nuclear potentials and charge-changing weak currents, derived in chiral effective field theory. The low-energy constants (LECs) c(D) and c(E), present in the three-nucleon potential and (c(D)) axial-vector current, are constrained to reproduce the A = 3 binding energies and the triton Gamow-Teller matrix element. The muon-capture rates on deuteron and He-3 are predicted to be 399 +/- 3 sec(-1) and 1494 +/- 21 sec(-1), respectively. The spread accounts for the cutoff sensitivity, as well as uncertainties in the LECs and electroweak radiative corrections. By comparing the calculated and precisely measured rates on He-3, a value for the induced pseudoscalar form factor is obtained in good agreement with the chiral perturbation theory prediction.
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页数:4
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