5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Study of \(\mathrm{\Upsilon }(1S)\) radiative decays to \(\gamma {\pi }^{+}{\pi }^{-}\) and \(\gamma {K}^{+}{K}^{-}\)

      , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The <i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration
      Physical Review D
      American Physical Society (APS)

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references28

          • Record: found
          • Abstract: not found
          • Article: not found

          Coupled-channel analysis of the πη and KK̄ systems near KK̄ threshold

            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            Glueball Spectrum and Matrix Elements on Anisotropic Lattices

            The glueball-to-vacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing ranging from 0.1fm - 0.2fm. These matrix elements are needed to predict the glueball branching ratios in \(J/\psi\) radiative decays which will help identify the glueball states in experiments. Two types of improved local gluonic operators are constructed for a self-consistent check and the finite volume effects are studied. We find that lattice spacing dependence of our results is very weak and the continuum limits are reliably extrapolated, as a result of improvement of the lattice gauge action and local operators. We also give updated glueball masses with various quantum numbers.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Big-Bang nucleosynthesis (Particle Data Group mini-review)

              A critical review is given of the current status of cosmological nucleosynthesis. In the framework of the Standard Model with 3 types of relativistic neutrinos, the baryon-to-photon ratio, \(\eta\), corresponding to the inferred primordial abundances of deuterium and helium-4 is consistent with the independent determination of \(\eta\) from WMAP observations of anisotropies in the cosmic microwave background. However the primordial abundance of lithium-7 inferred from observations is significantly below its expected value. Taking systematic uncertainties in the abundance estimates into account, there is overall concordance in the range \(\eta = (4.7 - 6.5) x 10^{-10}\) @ 95% c.l. (corresponding to a cosmological baryon density \(\Omega_B h^2\) = 0.017 - 0.024). The D and He-4 abundances, together with the CMB determination of \(\eta\), provide the bound \(N_\nu = 3.24 \pm 1.2\) @ 95% c.l. on the effective number of neutrino species. Other constraints on new physics are discussed briefly.
                Bookmark

                Author and article information

                Journal
                PRVDAQ
                Physical Review D
                Phys. Rev. D
                American Physical Society (APS)
                2470-0010
                2470-0029
                June 2018
                June 21 2018
                : 97
                : 11
                Article
                10.1103/PhysRevD.97.112006
                e12e39b3-aa40-4732-b272-9817850aa883
                © 2018

                https://creativecommons.org/licenses/by/4.0/

                History

                Comments

                Comment on this article