ar X iv : n uc l - th / 9 70 40 28 v 1 1 4 A pr 1 99 7 T - noninvariant effect in muon capture by 6 Li nucleus with decay to a continuum
نویسنده
چکیده
The T-noninvariant transverse polarization of neutrons is considered for muon capture by a 6 Li nucleus with decay into a quasistationary 2 + state of the three particle α + n + n continuum. This polarization is orthogonal to the plane spanned by the polarization axis of the initial mesic atom and the neutron momentum. The situation in which neutrons that are emitted in the plane orthogonal to the axis of the mesic-atom polarization and which have oppositely directed momenta equal in magnitude are selected is analyzed. The wave function of the final state is constructed by using the method of hyperspherical harmonics. In the approximation of the allowed Gamow-Teller transition 1 + → 2 + , this neutron polarization is expressed in terms of the T-noninvariant relative phase of reduced matrix elements for transitions from the 6 Li ground state to various final-state configurations.
منابع مشابه
X iv : n uc l - th / 9 90 30 22 v 1 9 M ar 1 99 9 Weak reactions on 12 C within the Continuum Random Phase Approximation with partial occupancies
We extend our previous studies of the neutrino-induced reactions on 12 C and muon capture to include partial occupation of nuclear subshells in the framework of the continuum random phase approximation. We find, in contrast to the work by Auerbach et al., that a partial occupation of the p 1/2 subshell reduces the inclusive cross sections only slightly. The extended model describes the muon cap...
متن کاملar X iv : n uc l - th / 9 60 70 32 v 1 1 7 Ju l 1 99 6 Competition Between Particle - Hole and Particle - Particle Correlations in Forbidden Electron Capture
The second unique forbidden electron capture (EC) decay in 123 Te is calculated in the Proton-Neutron Quasi-Particle Random Phase Approximation (pn-QRPA), making use of Skyrme-type residual interactions. As in the allowed Gamow-Teller channel, the forbidden nuclear matrix elements depend sensitively on the competition between particle-hole and particle-particle correlations. Theory provides a l...
متن کاملar X iv : n uc l - th / 9 70 40 51 v 1 2 3 A pr 1 99 7 TPR - 96 - 24 Space - time Characteristics of the Fireball from HBT
We present the Yano-Koonin-Podgoretski˘ ı parametrisation of the correlation function. Compared to the conventionally used Cartesian parametrisation, this one provides more straightforward measurement of the duration of the emission process in the fireball and a clearer signal of the longitudinal expansion, which is expected in ulrarelativistic heavy ion collisions.
متن کاملar X iv : n uc l - th / 9 71 10 28 v 1 1 4 N ov 1 99 7 A clue to the mechanism of Λ K + production in pp - reactions ∗
متن کامل
ar X iv : n uc l - th / 9 71 10 54 v 1 2 6 N ov 1 99 7 The π + – emission puzzle in 4 Λ He decay
We re-examine the puzzling π emission from the weak decay of 4ΛHe and propose an explanation in terms of a three–body decay of the virtual Σ. Such a resolution of the π decay puzzle is consistent with the calculated Σ probability in light Λ hypernuclei as well as the experimentally observed π energy spectrum and s–wave angular distribution. Typeset using REVTEX
متن کامل