https://biblio.ugent.be/publication/685594/file/1130605.pdf

Review of Particle Physics

The Pythia program can be used to generate high-energy-physics ''events'', i.e. sets of outgoing particles produced in the interactions between two incoming particles. The objective is to provide as accurate as possible a representation of event properties in a wide range of reactions, within and beyond the Standard Model, with emphasis on those where strong interactions play a role, directly or indirectly, and therefore multihadronic final states are produced. The physics is then not understood well enough to give an exact description; instead the program has to be based on a combination of analytical results and various QCD-based models. This physics input is summarized here, for areas such as hard subprocesses, initial- and final-state parton showers, underlying events and beam remnants, fragmentation and decays, and much more. Furthermore, extensive information is provided on all program elements: subroutines and functions, switches and parameters, and particle and process data. This should allow the user to tailor the generation task to the topics of interest.

/pdf/pythia-6-4-physics-and-manual-3dvwmijpnq.pdf

PYTHIA 6.4 Physics and Manual

https://cds.cern.ch/record/359207/files/9807278.pdf

Particle physics models of inflation and the cosmological density perturbation

Theories with Gauge-Mediated Supersymmetry Breaking

/pdf/review-of-particle-physics-1996-1997-jeg703df6k.pdf

Review of Particle Physics, 1996-1997

Precision corrections in the minimal supersymmetric standard model

Precision corrections to supersymmetric unification

We determine the neutralino and chargino masses in the MSSM at one loop. We perform a Feynman diagram calculation in the on-shell renormalization scheme, including quark-squark and lepton-slepton loops. We find generically the corrections are of the order of 5%. For a 20 GeV neutralino the corrections can be as large as 20%. The corrections change the region of \ensuremath{\mu}, ${\mathit{M}}_{2}$, tan\ensuremath{\beta} parameter space which is ruled out by CERN LEP data. We demonstrate that, e.g., for a given \ensuremath{\mu} and tan\ensuremath{\beta} the lower limit on the parameter ${\mathit{M}}_{2}$ can shift by 20 GeV.

Radiative corrections to neutralino and chargino masses in the minimal supersymmetric model

The complete radiative corrections to the gaugino and Higgsino masses in the minimal supersymmetric model

We study in some detail the spectral phenomenology of models in which supersymmetry is dynamically broken and transmitted to the supersymmetric partners of the quarks, leptons, and gauge bosons, and the Higgs bosons themselves, via the usual gauge interactions. We elucidate the parameter space of what we consider to be the minimal model, and explore the regions which give rise to consistent radiative electroweak symmetry breaking. We include the weak-scale threshold corrections, and show how they considerably reduce the scale dependence of the results. We examine the sensitivity of our results to unknown higher-order messenger-sector corrections. We compute the superpartner spectrum across the entire parameter space, and compare it to that of the minimal supergravity-inspired model. We delineate the regions where the lightest neutralino or {tau} slepton is the next-to-lightest supersymmetric particle, and compute the lifetime and branching ratios of the NLSP. In contrast with the minimal supergravity-inspired model, we find that the lightest neutralino can have a large Higgsino component, of order 50{percent}. Nevertheless, the neutralino branching fraction to the gravitino and the light Higgs boson remains small, {approx_lt}10{sup {minus}4}, so the observation of such a decay would point to a nonminimal Higgs sector. {copyright} {ital 1997} {ital Themore » American Physical Society}« less

Damien M. Pierce

Papers

Precision corrections in the minimal supersymmetric standard model

Precision corrections to supersymmetric unification

Radiative corrections to neutralino and chargino masses in the minimal supersymmetric model

The complete radiative corrections to the gaugino and Higgsino masses in the minimal supersymmetric model

Weak-scale phenomenology of models with gauge-mediated supersymmetry breaking