Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

The hidden-charm pentaquark and tetraquark states

Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts

Energy levels of light nuclei A=8,9,10

https://www.phys.hawaii.edu/~solsen/pub/x3872/Swanson_HHreview.pdf

The new heavy mesons: A status report

A comprehensive, relativistic many-body approach to hadron structure is advanced based on the Coulomb gauge QCD Hamiltonian. Dynamical chiral symmetry breaking naturally emerges, and both quarks and gluons acquire constituent masses when standard many-body techniques are employed. Gluonia are studied both in the valence and in the collective, random phase approximations. Calculated quenched glueball masses are found to be in remarkable agreement with lattice gauge theory when using representative values for the strong coupling constant and string tension. {copyright} {ital 1996 The American Physical Society.}

Glueball spectroscopy in a relativistic many-body approach to hadronic structure.

Using our previously developed crossing and duality consistent model for kaon photoproduction and radiative capture, we investigate the kaon electroproduction processes p(e,e'${\mathit{K}}^{+}$)Y for Y=\ensuremath{\Lambda}, ${\mathrm{\ensuremath{\Sigma}}}^{0}$, and \ensuremath{\Lambda}(1405). Because there is no electroproduction data near threshold, consistency requires extending the energy range of our photoproduction model parametrization from an upper bound of ${\mathit{E}}_{\ensuremath{\gamma}}^{\mathrm{lab}}$=1.4 to 2.2 GeV. We find that baryon resonances with spin greater than 1/2 are necessary to describe the higher energy photoproduction data (1.4\ensuremath{\le}${\mathit{E}}_{\ensuremath{\gamma}}^{\mathrm{lab}}$\ensuremath{\le}2.2 GeV). We also extend our use of duality by representing these higher-spin s- and u-channel baryon resonances with the low-lying t-channel vector, ${\mathit{K}}^{\mathrm{*}}$(890), and pseudovector, ${\mathit{K}}_{1}$(1270), mesons. Using this extended crossing and duality consistent model, we obtain reasonable agreement with the data for both photoproduction and electroproduction processes.

Hyperon electroproduction in a crossing and duality constrained model.

Results from an extensive relativistic many-body analysis utilizing a realistic effective QCD Hamiltonian are presented for the meson spectrum. A comparative numerical study of the BCS, Tamm-Dancoff (TDA), and RPA treatments provides new, significant insight into the condensate structure of the vacuum, the chiral symmetry governance of the pion, and the meson spin, orbital, and flavor mass splitting contributions. In contrast to a previous glueball application, substantial quantitative differences are computed between TDA and RPA for the light quark sector with the pion emerging as a Goldstone boson only in the RPA.

/pdf/meson-structure-in-a-relativistic-many-body-approach-2m297w24nc.pdf

Meson Structure in a Relativistic Many-Body Approach

Weinberg’s theorem for π-π scattering, including the Adler zero at threshold in the chiral limit, is analyticall proved for microscopic quark models that preserve chiral symmetry. Implementing Ward-Takahashi identities, the isospin 0 and 2 scattering lengths are derived in exact agreement with Weinberg’s low energy results. Our proof applies to alternative quark formulations including the Hamiltonian and Euclidean space Dyson-Schwinger approaches. Finally, the threshold π-π scattering amplitudes are calculated using the Dyson- Schwinger equations in the rainbow-ladder truncation, confirming the formal derivation.

/pdf/chirally-symmetric-quark-description-of-low-energy-pi-pi-118a7z6siv.pdf

Chirally symmetric quark description of low-energy pi pi scattering

Within the framework of the light-cone formalism we construct a model wave function appropriate for axial-vector mesons The spin bilinear covariant component of our model wave function is consistent with the Melosh transformation procedure We have applied our model to the {ital a}{sub 1} axial-vector meson and have compared the first six moments of the quark distribution amplitude with those obtained from the QCD sum-rule technique In addition to our axial-vector-meson results, we further investigate the simple light-cone quark model by computing moments for pseudoscalar {pi} and {ital K} and vector {rho} mesons and compare our results with those from various QCD sum-rule techniques and lattice calculations

Stephen R. Cotanch

Papers

Glueball spectroscopy in a relativistic many-body approach to hadronic structure.

Hyperon electroproduction in a crossing and duality constrained model.

Meson Structure in a Relativistic Many-Body Approach

Chirally symmetric quark description of low-energy pi pi scattering

Light-cone quark-model axial-vector-meson wave function.