On boundary corrections of Lüscher-Weisz string

The potential and the density profile of the QCD flux-tube are investigated within the framework of the Luscher-Weisz (LW) string action with two boundary terms. The Numerical simulations involve 4D SU(3) Yang-Mills LGT at finite temperature. In general, we detect signatures of the two boundary terms considered in the LWstring action. Near the end of QCD Plateau, the LW string is yielding a static potential which is in a good agreement with the lattice data for source separations R ≥ 0.3 fm. However, at T/Tc = 0.9, the fit to the potential data improves with a good fit attained at R ≥ 0.7 fm. The mean-square width of the energy profile at T/Tc = 0.9 matches well the width of the LW string over distance scales R ≥ 0.5 fm.

Decomposition of the static potential in the Maximal Abelian gauge

Decomposition of SU(2) gauge field into monopole and monopoleless components is studied in SU(2) gluodynamics and in QC2D with zero and nonzero quark chemical potential after fixing MA gauge. For both components we calculate respective static potential and compare their sum with the nonabelian static potential. We demonstrate good agreement in the confinement phase and discuss the implications of our results.

The static force from generalized Wilson loops using gradient flow

We explore a novel approach to compute the force between a static quark-antiquark pair with the gradient flow algorithm on the lattice. The approach is based on inserting a chromoelectric field in a Wilson loop. The renormalization issues, associated with the finite size of the chromoelectric field on the lattice, can be solved with the use of gradient flow. We compare numerical results for the flowed static potential to our previous measurement of the same observable without a gradient flow.

Study of Positron Impact Scattering from Methane and Silane Using an Analytically Obtained Static Potential with Correlation Polarization

A detailed study of positron impact elastic scattering from methane and silane is carried out using a model potential consisting of static and polarization potentials. The static potential for the molecular target is obtained analytically by using accurate Gaussian molecular wavefunctions. The molecular orbitals are expressed as a linear combination of Gaussian atomic orbitals. Along with the analytically obtained static potential, a correlation polarization potential is also added to construct the model potential. Utilizing the model potential, the Schrödinger equation is solved using the partial wave phase shift analysis method, and the scattering amplitude is obtained in terms of the phase shifts. Thereafter, the differential, integrated and total cross sections are calculated. These cross-section results are compared with the previously reported measurements and theoretical calculations.

Moist Static Potential Vorticity Budget in Tropical Motion Systems

Analyses of simple models of moist tropical motion systems reveal that the column-mean moist static potential vorticity (MSPV) can explain their propagation and growth. The MSPV is akin to the equivalent PV except it uses moist static energy (MSE) instead of the equivalent potential temperature. Examination of an MSPV budget that is scaled for moist off-equatorial synoptic-scale systems reveals that α, the ratio between the vertical gradients of latent and dry static energies, describes the relative contribution of dry and moist advective processes to the evolution of MSPV. Horizontal advection of the moist component of MSPV, a process akin to horizontal MSE advection, governs the evolution of synoptic-scale systems in regions of high humidity. On the other hand, horizontal advection of dry PV predominates in a dry atmosphere. Derivation of a “moist static” wave activity density budget reveals that α also describes the relative importance of moist and dry processes to wave activity amplification and decay. Linear regression analysis of the MSPV budget in eastern Pacific easterly waves shows that the MSPV anomalies originate over the eastern Caribbean and propagate westward due to dry PV advection. They are amplified by the fluxes of the moist component of MSPV over the Caribbean sea and over the eastern Pacific from 105-130°W, underscoring the importance of moist processes in these waves. On the other hand, dry PV convergence amplifies the waves from 90-100°W, likely as a result of the barotropic energy conversions that occur in this region.

An affective awareness

<p>One of the most captivating qualities of the New Zealand wilderness is its temporality; season’s, weather, night and day, are multiple interconnected systems in flux. These temporal systems are intricately linked and determine the feel of the environment. We perceive this natural temporal environment through levels of experience that build from affects. Architecture is designed to resist this temporality, with lights, shelter, warmth and more. The limited engagement between interior and exterior also removes environmental conditions that have positive impact. The fixity of architecture, in its resistance to the uncontrollable, to the temporal flux inherent in the environment, limits the potential for wilderness architecture to relate to its constantly changing context. This thesis argues that non-static architecture creates a stronger connection between people, architecture and the natural environment. The success of architecture to emphasise this connection is analysed through the lens of affect as a preconscious reaction, which counters the social and cultural expectations of space. The study of affect provided a framework of understanding to inform the active designing. A fluid semi-permanent shelter is designed, constructed of a woven structural system responsive to both weather conditions and the occupants. The activities that occur within these structures maximise the non-static potential for movement and create a constant interaction with the landscape. The interplay between uncontrollable flux and controllable movement in the structures provides a challenging context that heightens the inhabitant’s awareness of the relationship between people, architecture and natural environment.</p>

An affective awareness

<p>One of the most captivating qualities of the New Zealand wilderness is its temporality; season’s, weather, night and day, are multiple interconnected systems in flux. These temporal systems are intricately linked and determine the feel of the environment. We perceive this natural temporal environment through levels of experience that build from affects. Architecture is designed to resist this temporality, with lights, shelter, warmth and more. The limited engagement between interior and exterior also removes environmental conditions that have positive impact. The fixity of architecture, in its resistance to the uncontrollable, to the temporal flux inherent in the environment, limits the potential for wilderness architecture to relate to its constantly changing context. This thesis argues that non-static architecture creates a stronger connection between people, architecture and the natural environment. The success of architecture to emphasise this connection is analysed through the lens of affect as a preconscious reaction, which counters the social and cultural expectations of space. The study of affect provided a framework of understanding to inform the active designing. A fluid semi-permanent shelter is designed, constructed of a woven structural system responsive to both weather conditions and the occupants. The activities that occur within these structures maximise the non-static potential for movement and create a constant interaction with the landscape. The interplay between uncontrollable flux and controllable movement in the structures provides a challenging context that heightens the inhabitant’s awareness of the relationship between people, architecture and natural environment.</p>

NLO electroweak potentials for minimal dark matter and beyond

We calculate the one-loop correction to the static potential induced by γ, W and Z-exchange at tree-level for arbitrary heavy standard model multiplets. We find that the result obeys a “Casimir-like” scaling, making the NLO correction to the potential a “low-energy” property of the electroweak gauge bosons. Furthermore, we discuss the phenomenology of the NLO potentials, the analytically known asymptotic limits and provide fitting functions in position space for easy use of the results.