https://biblio.ugent.be/publication/685594/file/1130605.pdf

Review of Particle Physics

/pdf/review-of-particle-physics-1996-1997-jeg703df6k.pdf

Review of Particle Physics, 1996-1997

We review lattice results related to pion, kaon, D-meson, B-meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communities. More specifically, we report on the determination of the light-quark masses, the form factor $f_+(0)$ arising in the semileptonic $K \rightarrow \pi $ transition at zero momentum transfer, as well as the decay constant ratio $f_K/f_\pi $ and its consequences for the CKM matrix elements $V_{us}$ and $V_{ud}$. Furthermore, we describe the results obtained on the lattice for some of the low-energy constants of $SU(2)_L\times SU(2)_R$ and $SU(3)_L\times SU(3)_R$ Chiral Perturbation Theory. We review the determination of the $B_K$ parameter of neutral kaon mixing as well as the additional four B parameters that arise in theories of physics beyond the Standard Model. For the heavy-quark sector, we provide results for $m_c$ and $m_b$ as well as those for D- and B-meson decay constants, form factors, and mixing parameters. These are the heavy-quark quantities most relevant for the determination of CKM matrix elements and the global CKM unitarity-triangle fit. We review the status of lattice determinations of the strong coupling constant $\alpha _s$. Finally, in this review we have added a new section reviewing results for nucleon matrix elements of the axial, scalar and tensor bilinears, both isovector and flavor diagonal.

FLAG Review 2019

Energy levels of A = 21−44 nuclei (V)

Ab initio no core shell model

A mass dependence in hindrance factors for favoured gamow-teller transitions

The nuclear-structure dependence of radiative corrections in superallowed Fermi beta-decay

Enhancement in axial-charge matrix elements from meson-exchange currents

Measurements of superallowed 0[sup +][r arrow]0[sup +] nuclear [beta] decays, corrected for radiative and charge-dependent effects, yield fundamental properties of the weak interaction. Model predictions of the necessary corrections exist, but they have never been tested directly by experiment. The present work reports, for the first time, observations of (or limits on) nonanalog 0[sup +][r arrow]0[sup +] branches in [sup 38[ital m]]K, [sup 46]V, [sup 50]Mn, and [sup 54]Co, and tests of the model predictions for isospin-mixing corrections. The resulting unitarity test of the top row of the Kobayashi-Mashawa matrix is 0.9983[plus minus]0.0015.

Tests of isospin mixing corrections in superallowed 0(+)-->0(+) beta decays.

Presently, the world data for superallowed {beta} decay leads to a result in disagreement (at the 98% confidence level) with the predictions of the minimal standard model for the unitarity of the Cabibbo-Kobayashi-Maskawa matrix. Precise data for the superallowed 0{sup +}{yields}0{sup +} {beta} decay of {sup 74}Rb would provide a critical test of the nucleus-dependent isospin symmetry-breaking corrections that must be calculated for these superallowed Fermi {beta} decays. The present work reports the first precise measurement of the half-life for {sup 74}Rb (t{sub 1/2}=64.761{+-}0.031 ms ). The data were obtained at the radioactive beam facility (ISAC) at TRIUMF using a beam of {approx}4000 {sup 74}Rb ionss{sup -1} .

Precise half-life measurement for the superallowed 0(+)-->0(+) beta emitter (74)Rb: first results from the new radioactive beam facility (ISAC) at TRIUMF.

I. S. Towner

Papers

A mass dependence in hindrance factors for favoured gamow-teller transitions

The nuclear-structure dependence of radiative corrections in superallowed Fermi beta-decay

Enhancement in axial-charge matrix elements from meson-exchange currents

Tests of isospin mixing corrections in superallowed 0(+)-->0(+) beta decays.

Precise half-life measurement for the superallowed 0(+)-->0(+) beta emitter (74)Rb: first results from the new radioactive beam facility (ISAC) at TRIUMF.