G-parity violation of weak nucleon current and in-medium mass renormalization of nucleons detected through the β decays of spin aligned 12B and 12N

New limit of the G-parity irregular indu

New limit of the G-parity irregular induced tensor current and of the axial charge in the weak nucleon current detected in alignment correlation terms of 12B and 12N β decays

✍ K. Minanisono; T. Yamaguchi; K. Matsuta; T. Minamisono; T. Ikeda; Y. Muramoto; M 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 347 KB

The []-ray angular distributions from purely spin aligned t2B and J2N were precisely remeasured using a further refined spin-manipulation technique. We determined the amount of a G-parity violating induced tensor form factor in a weak axial vector current as 2MfT/f A = + 0.22 + 0.05(stat) + 0.15(sys