Review of lattice studies of resonances

I review recent progress in extracting resonance parameters using lattice field theory, with an emphasis on determining hadron resonances from lattice quantum chromodynamics. Until recently, the \rho-meson channel was the only one considered, while, during the last year, several resonant channels have been investigated for the first time. Recent lattice results for scattering phase shifts in resonant channels are presented.Comment: 16 pages, 19 figures, plenary talk given at the 30th International Symposium on Lattice Field Theory, Cairns, Australi

CLS 2+1 flavor simulations at physical light- and strange-quark masses

We report recent efforts by CLS to generate an ensemble with physical light- and strange-quark masses in a lattice volume of 192x96^3 at $\beta=3.55$ corresponding to a lattice spacing of 0.064 fm. This ensemble is being generated as part of the CLS 2+1 flavor effort with improved Wilson fermions. Our simulations currently cover 5 lattice spacings ranging from 0.039 fm to 0.086 fm at various pion masses along chiral trajectories with either the sum of the quark masses kept fixed, or with the strange-quark mass at the physical value. The current status of simulations is briefly reviewed, including a short discussion of measured autocorrelation times and of the main features of the simulations. We then proceed to discuss the thermalization strategy employed for the generation of the physical quark-mass ensemble and present first results for some simple observables. Challenges encountered in the simulation are highlighted.Comment: 7 pages, 8 figures; Proceedings, 35th International Symposium on Lattice Field Theory (Lattice2017): Granada, Spai

Towards extracting the timelike pion form factor on CLS two-flavour ensembles

Results are presented from an ongoing study of the $\rho$ resonance. The focus is on CLS 2-flavour ensembles generated using $\mathcal{O}(a)$ improved Wilson fermions with pion masses ranging from $265$ to $437$ $\mathrm{MeV}$. The energy levels are extracted by solving the GEVP of correlator matrices, created with the distillation approach involving $\rho$ and $\pi\pi$ interpolators. The study is done in the centre-of-mass frame and several moving frames. One aim of this work is to extract the timelike pion form factor after applying the L\"uscher formalism. We therefore plan to integrate this study with the existing Mainz programme for the calculation of the hadronic vacuum polarization contribution to the muon $g-2$.Comment: proceedings to conference: Lattice 2017, Granada, Spai

Glucose-6-Phosphate Dehydrogenase Deficiency

Major attention was first focused on the problem of acute hemolytic anemia in the early 1950\u27s, during the Korean War. Large numbers of American Negroes stationed in Korea developed this anemia after taking primaquine for treatment or prophylaxis of malaria. A study group was formed in Chicago under the direction of Alving; it was this group of investigators who contributed much of the early information which has led to our understanding of this type of anemia (Dern, et al, 1954; Dern, Beutler and Alving, 1954; Beutler, Dern, and Alving, 1954). This also resulted in an upsurge of interest in red cell metabolism, and led to many of the advances we are hearing about in this lecture series