Colorphilic Spin-2 Resonances in the LHC Dijet Channel

Experiments at the LHC may yet discover a dijet resonance indicative of Beyond the Standard Model (BSM) physics. In this case, the question becomes: what BSM theories are consistent with the unexpected resonance? One possibility would be a spin-2 object called the colorphilic graviton--a spin-2 color-singlet particle which couples exclusively to the quark and gluon stress-energy tensors. We assess the possibility of this state's discovery in the dijet channel as an s-channel resonance, and report the regions of parameter space where colorphilic gravitons have not yet been excluded by LHC-13 data but still may be discovered in the dijet channel at LHC-14 for integrated luminosities of 0.3, 1, and 3 ab$^{-1}$. We then delineate which of those regions remain accessible to future collider searches, once one accounts for applicability of the narrow-width approximation, detector mass resolution, and self-consistency according to tree-level partial-wave unitarity. We discover that--despite the strong constraints unitarity imposes on collider searches--the colorphilic graviton remains potentially discoverable in the LHC dijet channel. A means of investigation would be to apply the color discriminant variable (CDV), a dimensionless combination of quantities (cross-section, decay width, and invariant mass) that can be quickly measured after the discovery of a dijet resonance. Previous publications have demonstrated the CDV's utility when applied to theories containing Z', colorons, excited quarks, and diquarks. We extend this analysis to the colorphilic graviton by applying the CDV to the appropriate region of parameter space. We conclude that resolvable, discoverable dijet resonances consistent with colorphilic gravitons span a narrower range of masses than those consistent with leptophobic Z' models, and can be distinguished from those originating from coloron, excited quark, and diquark models.Comment: 23 pages, 4 figures, updated notation and figure

Direct Search Implications for a Custodially-Embedded Composite Top

We assess current experimental constraints on the bi-doublet + singlet model of top compositeness previously proposed in the literature. This model extends the standard model's spectrum by adding a custodially-embedded vector-like electroweak bi-doublet of quarks and a vector-like electroweak singlet quark. While either of those states alone would produce a model in tension with constraints from precision electroweak data, in combination they can produce a viable model. We show that current precision electroweak data, in the wake of the Higgs discovery, accommodate the model and we explore the impact of direct collider searches for the partners of the top quark.Comment: 12 pages, 2 figures (updated figures to show sin(beta) of 0.55 rather than 0.6, to be more informative to the reader)(second update fixes a figure format issue in Fig 1f

An Analysis of Faunal and Human Osteological Remains from the Eiden Site (33 Ln 14) of Sheffield, Ohio

The research project upon which this paper is based actually has been centered upon two separate though related foci: the first, laboratory analysis conducted by the author of the faunal remains collected during the summer 1977 season of evacuations at the Eiden site (33 ln 14), a late Woodlands occupation in Sheffield, Ohio; the second, work with fourteen of the burials located during that season at that site. These two areas of investigation have an underlying relationship, centering upon my interest in determining the implications of the results of both for attempting a reconstruction of the probable subsistence patterns of the Eiden people. The faithfulness of such a reconstruction has been affected in no slight degree by my inexperience in osteological work – whether on animal or human specimens; nevertheless, the process of deriving conclusions from this research has been both instructional and challenging

New Orleans Opera Association

This report is based on a three month internship at the New Orleans Opera Association during the summer of 1996. In this report, the intern has attempted to present the Opera\u27s past practices while comparing them to its current ideologies and projecting where the company is headed in the future. She has highlighted the Opera\u27s strengths and objectively analyzed the areas of concern. At the same time she has emphasized the fact that the New Orleans Opera Association is and will remain an extremely successful opera company with loyal and generous supporters. The Association shows every promise of continuing to provide New Orleans and the Gulf South region with first class opera performances by hiring some of the finest voices in the opera world and staging theatrical extravaganzas that will entertain and delight audiences well into the 21st century

New Orleans Opera Association

This report is based on a three month internship at the New Orleans Opera Association during the summer of 1996. In this report, the intern has attempted to present the Opera\u27s past practices while comparing them to its current ideologies and projecting where the company is headed in the future. She has highlighted the Opera\u27s strengths and objectively analyzed the areas of concern. At the same time she has emphasized the fact that the New Orleans Opera Association is and will remain an extremely successful opera company with loyal and generous supporters. The Association shows every promise of continuing to provide New Orleans and the Gulf South region with first class opera performances by hiring some of the finest voices in the opera world and staging theatrical extravaganzas that will entertain and delight audiences well into the 21st century

Using the Sulfur Cycle to Constrain Changes in Seawater Chemistry During the Paleogene

The sulfur isotopic composition of seawater sulfate (δ34S) has varied significantly throughout the Phanerozoic and is related to variability in Earth’s sulfur and carbon cycles. During the Early Eocene (~55 Ma to 45 Ma) the δ34S composition of seawater sulfate increased from +18‰ to +22‰ and has remained largely invariant over the last 34 Ma. The two principal hypotheses invoked to explain this positive excursion are: (1) a rapid increase in the flux of weathering-derived sulfate and an increase in sulfate concentrations, coupled with a compensatory increase in pyrite burial, or (2) an increase in the pyrite burial flux due to an expansion in the volume of anoxic waters. A clear understanding of this significant change in seawater sulfate chemistry is hampered by the relatively low temporal sampling resolution of data that reflect seawater sulfate δ34S during this period, and potential problems with the preservation of primary signals. Here, we use δ34S analysis of carbonate associated sulfate (CAS) from IODP Expedition 342, Newfoundland Drifts to test the pattern observed in marine barite δ34S records (Paytan et al., 1998) and to increase the temporal resolution of the δ34S isotope curve through the Eocene excursion. Despite the broad variability in the CAS record, these new data largely confirm the magnitude and timing of change observed in the Paytan et al. (1998) marine barite δ34S records, but the magnitude of the excursion is higher in the CAS record. Additionally, we observe a series of anomalous δ34S values that appear to the result from oxidation of 34S-depleted pyrite during CAS extraction or incorporation of 34S-enriched sulfate during authigenesis. These depleted or enriched values in the CAS record correlate with a lower concentration of CAS, suggesting that such samples are more susceptible to contamination of non-CA¬S sulfur during either extraction or original precipitation. We also performed δ34S analyses on pore-water sulfate to better constrain possible influences from pore-water sulfate on CAS δ 34S. These pore-water sulfate data indicate that microbial sulfate reduction is ongoing at sub-seafloor depths, yielding enriched pore-water sulfate values with depth. But, we observe no strong correlation between pore-water and CAS δ34S, suggesting that pore water sulfate contamination may not be the mechanism causing enriched CAS δ34S values. Our data do not provide a clear consensus between the two proposed mechanisms for this excursion, weathering-derived sulfate or an increase volume of anoxic waters; a surge in volcanically derived sulfur associated with sea-floor spreading offers an alternative mechanism for generating this positive excursion

Characteristics and likelihood of ongoing homelessness among unsheltered veterans

INTRODUCTION: Unsheltered homelessness is an important phenomenon yet difficult to study due to lack of data. The Veterans Health Administration administers a universal homelessness screener, which identifies housing status for Veterans screening positive for homelessness. METHODS: This study compared unsheltered and sheltered Veterans, assessed differences in rates of ongoing homelessness, and estimated a mixed-effect logistic regression model to examine the relationship between housing status and ongoing homelessness. RESULTS: Eleven percent of Veterans who screened positive for homelessness were unsheltered; 40% of those who rescreened were homeless six months later, compared with less than 20% of sheltered Veterans. Unsheltered Veterans were 2.7 times as likely to experience ongoing homelessness. DISCUSSION: Unsheltered Veterans differ from their sheltered counterparts-they are older, more likely to be male, less likely to have income-and may be good candidates for an intensive housing intervention. Future research will assess clinical characteristics and services utilization among this population

Exploring Women’s Representation in the Parliaments of Latin America

The existing literature on women in politics has made it abundantly clear that women around the world are facing structural, cultural, and socioeconomic barriers to power in both the public and private spheres. Yet, despite these common obstacles women in some countries fare better than others. Within Latin America, an otherwise fairly homogenous region, there exists a large variation in the percent women’s representation in the national single or lower houses, from 6.7% (Belize) to 38.6% (Costa Rica). Possible hypotheses for this spread will be tested using data from the Latinobarómetro Survey, UNESCO, the Quota Project, and the Inter-parliamentary Union. Isolating the main causal factors for low female political representation will provide a framework for the next steps of the women’s movement for gender equality in Latin America. In the years since the implementation of quotas (either legislative or at the party level) in 16 of the 19 cases presented here, women’s representation has risen significantly in these nationstates. In accordance with the literature, all of the most successful country cases utilize a proportional representation list system. This study finds that the institutions and the dedication of the government in power to reinforce these institutions are the most significant factors in increasing the representation of women in the national parliaments of Latin America

Antennal Depression as a Consummatory Response in the Madagascar Hissing Cockroach

Sign-tracking is a counterintuitive response that occurs when a signal stimulus is paired with reinforcement. Sign- and goal-tracking studies have been replicated across several species including pigeons, rats, quail, and cuttlefish. To date, no sign-tracking studies with the Madagascar Hissing Cockroach (MHC) are in the literature. Replicating sign-tracking studies with this new species is essential to an understanding how this counter-intuitive behavior occurs, particularly in invertebrate species like the MHC. To establish research on MHC sign- and goal-tracking, however, will first require ethological studies to identify potential dependent variables that indicate MHC responses to meaningful versus neutral stimuli. This study identifies the response topography of consummatory behavior in the MHC, for use with future studies