SARAH 3.2: Dirac Gauginos, UFO output, and more

SARAH is a Mathematica package optimized for the fast, efficient and precise study of supersymmetric models beyond the MSSM: a new model can be defined in a short form and all vertices are derived. This allows SARAH to create model files for FeynArts/FormCalc, CalcHep/CompHep and WHIZARD/OMEGA. The newest version of SARAH now provides the possibility to create model files in the UFO format which is supported by MadGraph 5, MadAnalysis, GoSam, and soon by Herwig++. Furthermore, SARAH also calculates the mass matrices, RGEs and one-loop corrections to the mass spectrum. This information is used to write source code for SPheno in order to create a precision spectrum generator for the given model. This spectrum-generator-generator functionality as well as the output of WHIZARD and CalcHep model files have seen further improvement in this version. Also models including Dirac Gauginos are supported with the new version of SARAH, and additional checks for the consistency of model implementations have been created.Comment: v3: Extended discussion of some functions of SARAH; matches version accepted for publicatio

Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies

SARAH is a Mathematica package for studying supersymmetric models. It calculates for a given model the masses, tadpole equations and all vertices at tree-level. Those information can be used by \SARAH to write model files for CalcHep/CompHep or FeynArts/FormCalc. In addition, the second version of SARAH can derive the renormalization group equations for the gauge couplings, parameters of the superpotential and soft-breaking parameters at one and two-loop level. Furthermore, it calculates the one-loop self energies and the one-loop corrections to the tadpoles. SARAH can handle all N=1 SUSY models whose gauge sector is a direct product of SU(N) and U(1) gauge groups. The particle content of the model can be an arbitrary number of chiral superfields transforming as any irreducible representation with respect to the gauge groups. To implement a new model, the user has just to define the gauge sector, the particle, the superpotential and the field rotations to mass eigenstates.Comment: 32 pages, some typoes corrected, matches published versio

A Wavering Prayer

Elizabeth Bishop\u27s Sestina Imitation; Sarah Gorski\u27s A Wavering Prayer

For youth, by youth: a third student-run homeless shelter

This past winter, the third student-run homeless shelter in the United States came into being. Two recent Harvard graduates, Sam Greenberg and Sarah Rosenkrantz, who had volunteered at the Harvard Square Homeless Shelter as college students, saw a need within the Boston and Cambridge communities for a homeless shelter serving young adults. Drawing upon the Harvard Square Homeless Shelter’s student-run model, Sam and Sarah worked with Harvard College undergraduates to open Youth-to-Youth (Y2Y) Harvard Square, a homeless shelter exclusively for young adults ages 18–24. This article features an interview with Sam and Sarah about their work to establish Y2Y Harvard Square and the experiences of the college students leading and staffing the shelter

Selected Poems

Selected poems by Sarah Jackson

Retaliation

Prose by Sarah Coffing

Garden paths and blind spots

A critical review of Sarah Waters's The Little Stranger: 'she is a commensurate storyteller whose...novels are akin to a gorgeous meal'

Three Generations of Moroccan Fashion Designers: Negotiating Local and Global Identity

Chapter in Fashioning Identities: Cultures of Exchange, edited by Sarah Heaton. Oxford: Inter-Disciplinary Press, 161-180