Antisplit Supersymmetry

I explore the phenomenology of Supersymmetry models in which the gauginos are much heavier then that scalar particles of the MSSM. In these models, the gauginos are inaccessible to colliders while the scalar spectrum is compressed. I give several examples of models which exhibit this phenomenology built in the class of General Gauge Mediated Models. I explore possible LSP and NLSP candidates in these scenarios including Higgsino, stau, and sneutrino candidates. Collider signatures for these models include multi-particle decay chains, many taus in the final state, and possible displaced vertices with semi-long lived sparticles. I enumerate the most likely collider smoking gun collider signatures for each general LSP/NLSP scenario.Comment: 26 pages, 7 figures, 6 table

Contextual Healing: What to Do About Scandalous Trademarks and Lanham Act 2(a)

Offensive trademarks have come to the forefront of trademark policy and practice in recent years. While it was once true that more attention had been paid to Lanham Act section 2(a) in the pages of law reviews than in the courts, recent prominent cases have focused attention on the ban on registration of offensive marks and the widespread impact of this ban on trademark owners. In this Article, I answer the fundamental question: Given the problems that my previous research has identified, what should be done about the 2(a) bar on registration of scandalous trademarks? This Article argues, as a preliminary matter, that the registration bar on scandalous marks should be removed from the Lanham Act because morality is outside the function and purpose of trademark law. Furthermore, removal of the bar would be in line with other forms of intellectual property, which have moved away from regulating morality. Finally, removing the bar would resolve concerns about the constitutionality of section 2(a). However, if the 2(a) bar remains part of the Lanham Act, it should be applied in a way that is fair and effective within in the legal framework of trademark law. Specifically, this Article argues that trademark examiners should evaluate offensiveness in the same way other bars to registration — and content in broadcast media — are evaluated: by considering the context of the marketplace

Intellectual Property and Indigenous Peoples: Adapting Copyright Law to the Needs of a Global Community

The definition and scope of intellectual property and associated laws are under intense debate in the emerging discourse surrounding intellectual property and human rights. These debates primarily arise within the context of indigenous peoples\u27 rights to protection and ownership of culturally specific properties. It is true that intellectual property laws are based on Western, developed markets, Western concepts of creation and invention, and Western concepts of ownership. But whatever their origins, those laws have been, and currently are, the primary vehicle for the protection of artistic, literary, and scientific works worldwide. To segregate indigenous interests from this international legal regime, particularly in light of the increasing globalization of markets, is to deny indigenous peoples both a powerful legal shield and a powerful legal sword. This Article argues that copyright laws can, and must, be expanded so as to maintain the vitality of, and protect, the creative artistic and literary works of indigenous cultures. The article proposes three major changes to international copyright law: the incorporation of collective and communal notions of authorship, the expansion of the originality requirement to reflect these forms of authorship, and the application of limits on the duration of copyright protection in a broader community context. The article further proposes that a variety of intellectual property mechanisms be drawn upon to provide special protection for “sacred” cultural works

New Calculations in Dirac Gaugino Models: Operators, Expansions, and Effects

In this work we calculate important one loop SUSY-breaking parameters in models with Dirac gauginos, which are implied by the existence of heavy messenger fields. We find that these SUSY-breaking effects are all related by a small number of parameters, thus the general theory is tightly predictive. In order to make the most accurate analyses of one loop effects, we introduce calculations using an expansion in SUSY breaking messenger mass, rather than relying on postulating the forms of effective operators. We use this expansion to calculate one loop contributions to gaugino masses, non-holomorphic SM adjoint masses, new A-like and B-like terms, and linear terms. We also test the Higgs potential in such models, and calculate one loop contributions to the Higgs mass in certain limits of R-symmetric models, finding a very large contribution in many regions of the $\mu$-less MSSM, where Higgs fields couple to standard model adjoint fields.Comment: 16 pages, 10 figure

Spitzer spectroscopy of circumstellar disks in the 5 Myr old upper Scorpius OB association

We present mid-infrared spectra between 5.2 and 38 μm for 26 disk-bearing members of the ~5 Myr old Upper Scorpius OB association obtained with the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope. We find clear evidence for changes in the spectral characteristics of dust emission between the early-type (B+A) and late-type (K+M) infrared excess stars. The early-type members exhibit featureless continuum excesses that become apparent redward of ~8 μm. In contrast, 10 and 20 μm silicate features or polycyclic aromatic hydrocarbon emission are present in all but one of the late-type excess members of Upper Scorpius. The strength of silicate emission among late-type Upper Scorpius members is spectral-type dependent, with the most prominent features being associated with K5-M2-type stars. By fitting the spectral energy distributions (SED) of a representative sample of low-mass stars with accretion disk models, we find that the SEDs are consistent with models having inner disk radii ranging from ~0.2 to 1.2 AU. Complementary high-resolution (R ~ 33,000) optical (λλ4800-9200) spectra for the Upper Scorpius excess stars were examined for signatures of gaseous accretion. Of the 35 infrared excess stars identified in Upper Scorpius, only seven (all late-type) exhibit definitive signatures of accretion. Mass-accretion rates (M) for these stars were estimated to range from 10^–11 to 10^–8.9 M⊙ yr^–1. Compared to Class II sources in Taurus-Auriga, the disk population in Upper Scorpius exhibits reduced levels of near- and mid-infrared excess emission and an order of magnitude lower mass-accretion rates. These results suggest that the disk structure has changed significantly over the 2-4 Myr in age separating these two stellar populations. The ubiquity of depleted inner disks in the Upper Scorpius excess sample implies that such disks are a common evolutionary pathway that persists for some time