Showing 1997 · hep-phShow all

59 papers · 2 filters

hep-ph1997★ 2 cited

Disoriented Chiral Condensate: Theory and Phenomenology

J. D. Bjorken

The basic ideas underlying the production dynamics and search techniques for disoriented chiral condensate are described.

hep-ph1997★ 90 cited

Bounding the effect of penguin diagrams in

Yuval Grossman, Helen R. Quinn

A clean determination of the angle of the unitary triangle from decays requires an isospin analysis. If the and decay rates are sma…

hep-ph1997★ 5 cited

Multiparticle Dynamics 1997: Concluding Talk

J. D. Bjorken

This contribution to the XXVII Symposium on Multiparticle Dynamics held in Frascati, Italy, September, 1997 consists of the following subject matter: (1) Introductory generalities.…

hep-ph1997★ 60 cited

Composite Quarks and Leptons from Dynamical Supersymmetry Breaking without Messengers

Nima Arkani-Hamed, Markus A. Luty, John Terning

We present new theories of dynamical SUSY breaking in which the strong interactions that break SUSY also give rise to composite quarks and leptons with naturally small Yukawa coupl…

hep-ph1997★ 3 cited

Polarization Asymmetry Zero in Heavy Quark Photoproduction and Leptoproduction Cross Sections

Stanley J. Brodsky, Ivan Schmidt

We demonstrate two novel features of the sea-quark contributions to the polarized structure functions and photoproduction cross sections, a zero sum rule and a zero crossing point…

hep-ph1997★ 22 cited

Higgs Bosons Strongly Coupled to the Top Quark

Michael Spira, James D. Wells

Several extensions of the Standard Model require the burden of electroweak symmetry breaking to be shared by multiple states or sectors. This leads to the possibility of the top qu…

hep-ph1997★ 73 cited

Asymptotic Pade Approximant Predictions: up to Five Loops in QCD and SQCD

J. Ellis, I. Jack, D. R. T. Jones +2

We use Asymptotic Pade Approximants (APAP's) to predict the four- and five-loop β-functions in QCD and N=1 supersymmetric QCD (SQCD), as well as the quark mass anomalous dimensions…

hep-ph1997★ 21 cited

A Complete Order-alpha**3 Calculation of the Cross Section for Polarized Compton Scattering

M. L. Swartz

The construction of a computer code to calculate the cross sections for the spin-polarized processes e-gamma=>e-gamma,e-gamma-gamma,e-e+e- to order-alpha**3 is described. The code…

hep-ph1997★ 53 cited

Probing the Flavor and CP Structure of Supersymmetric Models with K --> pi nu nubar Decays

Yosef Nir, Mihir P. Worah

We study the implications of various supersymmetric models on the rare and decays. Although large effects are possible in generic supersym…

hep-ph1997★ 23 cited

Trilepton Higgs signal at hadron colliders

Howard Baer, James D. Wells

Determining the origin of electroweak symmetry breaking will be one of the primary functions of high energy colliders. We point out that most Higgs boson searches pursued at hadron…

hep-ph1997★ 1 cited

Leptoquarks at Future Lepton Colliders

Thomas G. Rizzo

In this talk I summarize the capability of future lepton colliders to discover leptoquarks and to determine their electroweak quantum numbers. This analysis is an updated discussio…

hep-ph1997★ 4 cited

Z' Investigations at Future Lepton Colliders

Thomas. G. Rizzo

In this talk I summarize the capability of future lepton colliders to indirectly discover a new and to determine its couplings to the fermions of the Standard Model. The physi…

hep-ph1997★ 56 cited

Three-body decays of selectrons and smuons in low-energy supersymmetry breaking models

S. Ambrosanio, Graham D. Kribs, Stephen P. Martin

In models with low-energy supersymmetry breaking, it is well-known that charged sleptons can be significantly lighter than the lightest neutralino, with the gravitino and lighter s…

hep-ph1997★ 19 cited

Implications of the Fleischer-Mannel Bound

Yuval Grossman, Yosef Nir, Stephane Plaszczynski +1

Fleischer and Mannel (FM) have shown that it may become possible to constrain the angle of the unitarity triangle from measurements of various decays. This constraint…

hep-ph1997★ 17 cited

The Role of the Vacuum Insertion Approximation in Calculating CP Asymmetries in B Decays

Yuval Grossman, Boris Kayser, Yosef Nir

CP asymmetries in decays into final CP eigenstates are in many cases theoretically clean. In particular, they do not depend on the values of hadronic parameters. The sign of th…

hep-ph1997★ 3 cited

chi^2 Analysis of Supersymmetric Models

Damien M. Pierce, Jens Erler

We discuss the results of a global fit to precision data in supersymmetric models. We consider both gravity- and gauge-mediated models. As the superpartner spectrum becomes light,…

hep-ph1997★ 89 cited

CP Asymmetry in B_d --> phi K_S: Standard Model Pollution

Yuval Grossman, Gino Isidori, Mihir P. Worah

The difference in the time dependent CP asymmetries between the modes and is a clean signal for physics beyond the Standard Model. This interpretati…

hep-ph1997★ 65 cited

Aspects of SU(N_c) Gauge Theories in the Limit of Small Number of Colors

Stanley J. Brodsky, Patrick Huet

We investigate properties of the color space of gauge theories in the limit of small number of colors and large number of flavors. More generally, we introd…

hep-ph1997★ 2 cited

Dark matter in gravity-mediated supersymmetry breaking

James D. Wells

In R parity conserving supersymmetric theories the lightest superpartner (LSP) is stable. The LSPs may comprise a large fraction of the energy density of the current universe, whic…

hep-ph1997★ 468 cited

One-Loop Amplitudes for e^+ e^- to Four Partons

Z. Bern, L. Dixon, D. A. Kosower

We present the first explicit formulae for the complete set of one-loop helicity amplitudes necessary for computing next-to-leading order corrections for e^+ e^- annihilation into…

hep-ph1997★ 16 cited

Don't Stop Thinking About Leptoquarks: Constructing New Models

JoAnne L. Hewett, Thomas G. Rizzo

We discuss the general framework for the construction of new models containing a single, fermion number zero scalar leptoquark of mass GeV which can both satisfy t…

hep-ph1997★ 2 cited

in the Standard Model

C. Greub, T. Hurth

We give a summary about the various contributions which have to be calculated in order to obtain the next-to-leading logarithmic result for the branching ratio . C…

hep-ph1997

CP Violation in K and B Decays

Gerhard Buchalla

We review basic aspects of the phenomenology of CP violation in the decays of and mesons. In particular we discuss the commonly used classification of CP violation -- CP vi…

hep-ph1997

BFKL Scattering at LEPII and a Next e+ e- Collider

S. J. Brodsky, F. Hautmann, D. E. Soper

We discuss virtual photon scattering in the region dominated by BFKL exchange and report results for the cross sections at present and future e+ e- colliders.