Hadrons Under Extreme Conditions

At high temperature and density, strongly interacting matter experiences a phase transition from a hadronic phase to a quark-gluon plasma. Heavier hadrons are able to survive longer inside the quark-gluon plasma, but their properties change as they approach deconfinement. This thesis aims to investigate the onset of deconfinement and the properties of heavy hadrons as they approach this state, with a particular focus on baryons under extreme conditions. The research will utilise non-relativistic potential models and will build upon the method of Silvestre et al. (2020) [1], which utilises a variational approach to solve three-body potential models through expansion of the wave function in a simple harmonic oscillator basis. The project will also extend this method to solve spin-dependent baryon models. The main focus of this thesisis the application of this method to temperature-dependent baryon potential models. To this end, we will solve two such models that include a spin-spin interaction term. We find that the masses of heavy baryons decrease as temperature is increased, less so for the heavier baryons, for the heaviest baryons we found its mass to actually increase as temperature was increased. We have also used our method to predict the dissociation points of some heavy baryons and have found that heavier baryons are able to survive for longer, as temperature is increased. Furthermore, all baryons grow quickly in size as temperature is increased, reaching infinite size at criticality

Hadrons at high temperature: an update from the FASTSUM collaboration

We present the most recent results from the FASTSUM collaboration for hadron properties at high temperature. This includes the temperature dependence of the light and charmed meson and baryon spectrum, as well as properties of heavy quarkonia. The results are obtained using anisotropic lattices with a fixed scale approach. We also present the status of our next generation gauge ensembles.Comment: 8 pages, 8 figures. Contribution to the XVth Quark Confinement and the Hadron Spectrum, 1-6 August 2022, Stavanger, Norwa

Hadrons at high temperature: An update from the FASTSUM collaboration

We present the most recent results from the FASTSUM collaboration for hadron properties at high temperature. This includes the temperature dependence of the light and charmed meson and baryon spectrum, as well as properties of heavy quarkonia. The results are obtained using anisotropic lattices with a fixed scale approach. We also present the status of our next generation gauge ensembles

Experimental and Theoretical Study on Theobromine Solubility Enhancement in Binary Aqueous Solutions and Ternary Designed Solvents

The solubility of theobromine was studied both experimentally and theoretically. The solubility was determined spectrophotometrically at 25 °C in neat organic solvents, aqueous binary mixtures, Natural Deep Eutectic Solvents (NADES) and ternary NADES mixtures with water. It was found that addition of water in unimolar proportions with some organic solvents increases theobromine solubility compared to neat solvents. Additionally, using NADES results in a solubility increase of the studied compound not only in relation to water but also DMSO. The addition of water (0.2 molar fraction) to NADES is responsible for an even larger increase of solubility. The measured solubilities were interpreted in terms of three theoretical frameworks. The first one—belonging to the set of data reduction techniques—proved to be very efficient in quantitative back-computations of excess solubility of theobromine in all studied systems. The default approach utilizing the well-recognized COSMO-RS (Conductor-like Screening Model for Real Solvents) framework offered at most a qualitative solubility description. The extended search for possible contacts provided evidence for the existence of many intermolecular complexes that alter the electron density of the solute molecule, thus influencing solubility computations. Taking into account such intermolecular contacts by using the COSMO-RS-DARE (Conductor-like Screening Model for Realistic Solvation-Dimerization, Aggregation, and Reaction Extension) framework seriously increased the accuracy of solubility computations

Hadrons at high temperature: An update from the FASTSUM collaboration

We present the most recent results from the FASTSUM collaboration for hadron properties at high temperature. This includes the temperature dependence of the light and charmed meson and baryon spectrum, as well as properties of heavy quarkonia. The results are obtained using anisotropic lattices with a fixed scale approach. We also present the status of our next generation gauge ensembles.</jats:p