Gauge singlet renormalisation in softly-broken supersymmetric theories

We consider the renormalisation of a softly-broken supersymmetric theory with singlet fields and a superpotential with a linear term. We show that there exist exact beta-functions for both the linear term in the superpotential and the associated linear term in the Lagrangian. We also construct exact renormalisation group invariant trajectories for these terms, corresponding to the conformal anomaly solution for the soft masses and couplings.Comment: 13 pages, Plain TeX, uses Harvmac. Typos corrected and minor clarification adde

Snowmass Benchmark Points and Three-Loop Running

We present the full three-loop beta-functions for the MSSM generalised to include additional matter multiplets in 5, 10 representations of SU(5). We analyse in detail the effect of three-loop running on the sparticle spectrum for the MSSM Snowmass Benchmark Points. We also consider the effect on these spectra of additional matter multiplets (the semi-perturbative unification scenario).Comment: 28 pages, TeX, 4 figures, 10 tables. Uses Harvmac and eps

Comment on "Critical Dynamics of a Vortex-Loop Model for the Superconducting Transition"

Recently, Aji and Goldenfeldt [Phys. Rev. Lett. 87, 197003 (2001), cond-mat/0105622] put forward an explanation for the value of the dynamic critical exponent z observed in certain Monte Carlo simulations of the superconducting phase transition in zero magnetic field. In this Comment, we point out that their analysis is based on incorrect assumptions regarding the scaling dimension of the vortex density.Comment: 1 page, no figure

Three loop soft running, benchmark points and semi-perturbative unification

We consider three-loop $\beta$-function corrections to the sparticle spectrum in the MSSM, with particular emphasis on Snowmass Benchmark points. The three loop running has little effect on the weakly interacting particle spectrum, but for the squark masses the effect can be comparable to, or greater than, that of two loop running. We extend the analysis to the semi-perturbative unification scenario, where the impact of the three loop corrections becomes even more dramatic.Comment: 12 pages, TeX, Uses Harvmac (big) and epsf. Added references (v2). More emphasis on magnitude of three loop corrections (v3

Voices of Beneficiaries: Early Experiences with the Medicare Drug Benefit

Presents findings from a survey that examines the enrollment decisions, experiences, and future concerns related to the prescription drug coverage of beneficiaries with the new Medicare prescription drug benefit. Part of a series of interviews

Reflections from the Other Side of the World

Pilot study abroad program at Kochi University lands junior Jack Dunleavy on a life-changing trip to Japan

Labor Bookshelf

[Excerpt] The four books under review here argue against the statistics by telling story upon story of the activities that clearly have the potential for reversing labor\u27s demise. Most of the stories are about defensive struggles not new offensives, and even the most inspiring victories are hedged with all sorts of qualifications. But you cannot read these books without a sense of renewal and hope for the future, without a sense of what is possible when working people take things in their own hands

[Review of] David A. Hollinger, Postethnic America: Beyond Multiculturalism

This important volume by the distinguished intellectual historian, David Hollinger, sorts through key multicultural issues and brings a much needed freshness to a very stale, angry debate. In outlining the social contours of a postethnic America, he describes a country less obsessed with race and ethnicity, and open to the forging of social bonds between people of different heritages of descent. Unlike many criticisms of multiculturalism, Hollinger\u27s postethnic vision remains attentive to ethnic difference while pointing up the relevance and value of an American national culture. Those heavily invested in shoring up racial and ethnic boundaries will surely resist the author\u27s depiction of a less fragmented postethnic America