A 2 TeV WRW_R, Supersymmetry, and the Higgs Mass

A recent ATLAS search for diboson resonances and a CMS search for $eejj$ resonances which both show excesses with significance around 3 sigma have generated interest in $SU(2)_R$ gauge extensions of the Standard Model with a $W'$ mass around 2 TeV. We investigate the possibility that an $SU(2)_R$ gauge extension of the MSSM compatible with an explanation of the diboson anomaly might give rise to a significant enhancement of the Higgs mass above the MSSM tree level bound $m_{h, \text{tree}} < 90 \; \text{GeV}$ due to non-decoupling D-terms. This model contains a vector-like charge -1/3 $SU(2)_R$ singlet quark for each generation which mixes significantly with the $SU(2)_R$ doublet quarks, affecting the $W_R$ phenomenology. We find that it is possible to achieve $m_{h, \text{tree}} > 110 \; \text {GeV}$, and this requires that the $Z'$ mass is close to 3 TeV.Comment: 18 pages + appendices, 6 figure

Hidden-Sector Higgs Bosons at High-Energy Electron-Positron Colliders

The possibility of a scalar messenger that can couple the Standard Model (SM) to a hidden sector has been discussed in a variety of contexts in the literature in recent years. We consider the case that a new scalar singlet charged under an exotic spontaneously broken Abelian gauge symmetry mixes weakly with the SM Higgs resulting in two scalar mass states, one of which has heavily suppressed couplings to the SM particles. Previous phenomenological studies have focussed on potential signatures for such a model at the Large Hadron Collider (LHC). However, there are interesting regions of the parameter space in which the heavier Higgs state would be out of reach for LHC searches if its mass is greater than 1 TeV. We therefore investigate the discovery potential for such a particle at a 3 TeV electron-positron collider, which is motivated by the recent developments of the Compact Linear Collider (CLIC). We find that such an experiment could substantially extend our discovery reach for a heavy, weakly coupled Higgs boson, and we discuss three possible search channels.Comment: 14 pages, 8 Figures. Published as an LCD Not

Anomaly Detection for Resonant New Physics with Machine Learning

Despite extensive theoretical motivation for physics beyond the Standard Model (BSM) of particle physics, searches at the Large Hadron Collider (LHC) have found no significant evidence for BSM physics. Therefore, it is essential to broaden the sensitivity of the search program to include unexpected scenarios. We present a new model-agnostic anomaly detection technique that naturally benefits from modern machine learning algorithms. The only requirement on the signal for this new procedure is that it is localized in at least one known direction in phase space. Any other directions of phase space that are uncorrelated with the localized one can be used to search for unexpected features. This new method is applied to the dijet resonance search to show that it can turn a modest 2 sigma excess into a 7 sigma excess for a model with an intermediate BSM particle that is not currently targeted by a dedicated search.Comment: Replaced with short PRL version. 7 pages, 2 figures. Revised long version will be submitted separatel

Understanding the Growth and Formation of Synthetic Diamond

Since ancient times, diamond and its associated properties have inspired both intrigue and fascination. For much of this time, the only source of diamond has been those mined out of the ground, meaning limited or restricted access for many. However, as recently as 70 years ago, it was determined that diamond can be successfully synthesised from the much more mundane graphite, opening a multitude of synthetic possibilities. Over the course of this report, the current knowledge of diamond’s properties and its synthesis at high pressure and high temperature is reviewed, in addition to the properties of graphite. Thermodynamic and kinetic considerations for the formation of diamond are also discussed, as well as the spectroscopic analysis of both diamond and graphite. The synthesis, structure and physical properties of different crystallographic diamond defects are also explored. Following this, a new type of high pressure, high temperature apparatus for the manufacture of diamond-based materials is discussed, with a particular emphasis on the formation of poly-crystalline diamond composites. Exploration of the high-performance materials that allow this design to efficiently function under the extremely harsh conditions required for diamond synthesis is also undertaken, with a focus on the synthesis of carbon-fibre carbon frameworks. Finally, in light of the results obtained, future research surrounding the understanding of diamond formation, as well as the material considerations of this new approach is outlined

Architecture in Anime: Miyazaki\u27s Motifs

Internationally known, celebrated, and respected, director Hayao Miyazaki has become a household name by transforming an industry through his films. This research focuses on Miyazaki’s process and the similarities he shares with architects, both in and out of his works. By initially examining his background, the three motifs of architecture, inspiration, and sustainability are explored through works like Spirited Away, Howl’s Moving Castle, Princess Mononoke and more. The results of this research are to inform fans of both architecture and anime about the connection between someone who designs and builds the world, and one who designs and builds worlds