D. Finnell

SLAC National Accelerator Laboratory

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Jonathan L. Feng

University of California, Irvine

Philippe Pouliot

The University of Texas at Austin

Michael J. Boulware

Medtronic (United States)

Cooperative Institutions

University of California, Irvine

Medical College of Wisconsin

University of Liverpool

Istituto Nazionale di Fisica Nucleare, Sezione di Genova

Tsinghua University

University of California, Los Angeles

Kennedy Krieger Institute

Université Grenoble Alpes

Stony Brook University

National Institutes for Quantum and Radiological Science and Technology

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Squark mass determination at the next generation of lineare+e−colliders

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (1994)

Jonathan L. Feng D. Finnell

Current mass limits allow the possibility that squarks may be produced in large numbers at the next generation of linear ${e}^{+}{e}^{\ensuremath{-}}$ colliders. In this paper we investigate the prospects for precision studies of squark masses at such colliders. We assume that squarks are lighter than gluinos, and discuss both direct and cascade decay scenarios. By exploiting the clean environment and polarizable beams of linear ${e}^{+}{e}^{\ensuremath{-}}$ colliders, we find that squark mass determinations at the level of a few GeV are possible in a large part of the parameter space.

10.1103/physrevd.49.2369

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Citations (44)

A Note on Renormalization Group Invariance And Exact Results in SUSY Gauge Theories

arXiv (Cornell University) (1997)

D. Finnell

We comment on a recent puzzle regarding renormalization group invariance of exact results in SUSY theories, and argue that a purported renormalization of the dynamical scale Λdoes not in fact occur.

10.48550/arxiv.hep-th/9706043

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Aspects of Supersymmetry and Superstring Theory

PhDT (1995)

D. Finnell

Green–Schwarz mechanism

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Squark mass determination at a future linear collider

Jonathan L. Feng D. Finnell

Present mass limits allow the possibility that squarks may be produced at future linear e{sup +}e{sup {minus}} colliders. In this talk the authors discuss the prospects for precision studies of squark masses at such a facility. Both direct and cascade decay scenarios are discussed. By exploiting the clean environment and polarizable beams of linear e{sup +}e{sup {minus}} colliders, they find that squark mass determinations at the level of a few GeV are possible for a number of regions in parameter space.

Superpartner

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Grand unification with three generations in free fermionic string models

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (1996)

D. Finnell

We examine the problem of constructing three generation free fermionic string models with grand unified gauge groups. We attempt the construction of $G\times G$ models, where $G$ is a grand unified group realized at level 1. This structure allows those Higgs representations to appear which are necessary to break the symmetry down to the standard model gauge group. For $G=SO(10)$, we find only models with an even number of generations. However, for $G=SU(5)$ we find a number of 3 generation models.

Gauge group

Unification

10.1103/physrevd.53.5781

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Citations (21)

Instanton calculations versus exact results in four dimensional SUSY gauge theories

Nuclear Physics B (1995)

D. Finnell Philippe Pouliot

We relate the non-perturbative exact results in supersymmetry to perturbation theory using several different methods: instanton calculations at weak or strong coupling, a method using gaugino condensation and another method relating strong and weak coupling. This allows many precise numerical checks of the consistency of these methods, especially the amplitude of instanton effects, and of the network of exact solutions in supersymmetry. However, there remain difficulties with the instanton computations at strong coupling.

Instanton

Gaugino

10.1016/0550-3213(95)00318-m

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Citations (161)

Radiative corrections toB(Z→bb¯)in the minimal supersymmetric standard model

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (1991)

Michael J. Boulware D. Finnell

We examine one-loop vertex corrections to the process $Z\ensuremath{\rightarrow}b\overline{b}$ in the minimal supersymmetric standard model. The amplitude for this process may be enhanced by large Yukawa couplings which arise in the case of a heavy top or a very large value of $tan\ensuremath{\beta}$. This leads to the possibility that supersymmetry might be observed indirectly by precision measurements of $B(Z\ensuremath{\rightarrow}b\overline{b})$.

Yukawa potential

10.1103/physrevd.44.2054

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Citations (106)