Because of interest in the 11,12 B(n,γ) reaction in seeding r-process nucleosynthesis through light neutron-rich nuclei, we have measured the 12 B(d,p) reaction for the first time using the ATLAS in-flight facility at Argonne National Laboratory. We also measured the 11 B(d,p) reaction in the same way for calibration. The spectroscopic factors of excited states and the branching ratio of the ne...

The calculation of quark propagators for Ginsparg-Wilson-type Dirac operators is costly and thus limited to a few different sources. We present a new approach for determining spatially optimized operators for lattice spectroscopy of excited hadrons. Jacobi smeared quark sources with different widths are combined to construct hadron operators with different spatial wave functions. We study the R...

We study the five dimensional left-right symmetric gauge theory in which the gauge symmetry is broken down through orbifold compactification to four dimensions. The right handed charged gauge boson, WR is a Kaluza-Klein excited state in this model, and unlike the usual left-right symmetric model in four dimension, there is no mixing in the charged sector. We develop the formalism and give expre...

Production of final states containing open charm (c) and beauty (b) quarks at HERA is reviewed. Photoproduction (PHP) of the charm meson resonances D∗, D and Ds, as well as D∗ production in the deep inelastic scattering (DIS) regime, are measured and compared to QCD predictions. The excited charm mesons D 1(2420), D ∗0 2 (2460) and D ± s1(2536) have been observed and the rates of charm quarks h...

We use lattice methods to evaluate from first principles the spectrum of hybrid mesons produced by gluonic excitations in quenched QCD with quark masses near the strange quark mass. For the spin-exotic mesons with J P C = 1 −+ , 0 +− , and 2 +− which are not present in the quark model, we determine the lightest state to be 1 −+ with mass of 2.0(2) GeV. Results obtained for orbitally excited mes...

We study the Roper excitation in the (α, α ′) reaction. We consider all processes which may be relevant in the Roper excitation region, namely, Roper excitation in the target, Roper excitation in the projectile, and double ∆ excitation processes. The theoretical investigation shows that the Roper excitation in the proton target mediated by an isoscalar exchange is the dominant mechanism in the ...

R. J. Charity,1 K. Mercurio,2 L. G. Sobotka,1,2 J. M. Elson,1 M. Famiano,3 A. Banu,4 C. Fu,4 L. Trache,4 and R. E. Tribble4 1Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA 2Department of Physics, Washington University, St. Louis, Missouri 63130, USA 3Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA 4Cyclotron Institute, Texas A&M...

We consider radiative and pionic decays of the new Ds-mesons in the framework of a phenomenologically motivated approach. Present data on ratios of the two kinds of decays can be described without explicit using a 4-quark component. Most probably, the isospin violation in decays of different Ds-mesons is not universal, and the binding potential should be different from Coulombic. New precise me...

Ayub, R. 2017. Excited State Aromaticity and Antiaromaticity. Fundamental Studies and Applications. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1594. 61 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0138-9. The central theme of this thesis is the ability to tune various molecular properties by controlling and utilizing aroma...