Showing 2004 · hep-phShow all

32 papers · 2 filters

hep-ph2004★ 5 cited

Higgsless Electroweak Symmetry Breaking

Csaba Csaki

We discuss the possibility of breaking the electroweak symmetry in theories with extra dimensions via boundary conditions, without a physical Higgs scalar in the spectrum. In these…

hep-ph2004★ 92 cited

Collider Phenomenology of the Higgsless Models

Andreas Birkedal, Konstantin Matchev, Maxim Perelstein

We identify and study the signatures of the recently proposed Higgsless models at the Large Hadron Collider (LHC). We concentrate on tests of the mechanism of partial unitarity res…

hep-ph2004★ 41 cited

Two-Loop Relations for Heavy-Quark Parameters in the Shape-Function Scheme

Matthias Neubert

Moments of the renormalized B-meson shape function provide a natural way to define short-distance, running heavy-quark parameters such as the b-quark mass and kinetic energy. These…

hep-ph2004

Heavy Quarkonium Physics

N. Brambilla, M. Krämer, R. Mussa +82

This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of t…

hep-ph2004

B Decays on the Lattice and Results for Phenomenology

Matthew Wingate, Christine Davies, Alan Gray +3

Lattice Monte Carlo simulations now include the effects of 2 light sea quarks and 1 strange sea quark through the use of an improved staggered fermion action. Consequently, results…

hep-ph2004★ 56 cited

Comment on ``B->M_1 M_2: Factorization, charming penguins, strong phases, and polarization''

M. Beneke, G. Buchalla, M. Neubert +1

We show that the factorization formula for non-leptonic B decays to two light flavor non-singlet mesons derived by Bauer et al. in the context of soft-collinear effective theory is…

hep-ph2004★ 323 cited

Phenomenology of the Littlest Higgs with T-Parity

Jay Hubisz, Patrick Meade

Little Higgs models offer an interesting approach to weakly coupled electroweak symmetry breaking without fine tuning. The original little Higgs models were plagued by strong const…

hep-ph2004★ 13 cited

Impact of Four-Quark Shape Functions on Inclusive B Decay Spectra

Matthias Neubert

It has recently been pointed out that a new class of subleading shape functions involving B-meson matrix elements of non-local four-quark operators contributes at order Lambda_{QCD…

hep-ph2004★ 3 cited

Soft-Collinear Factorization and Sudakov Resummation of Heavy Meson Decay Amplitudes with Effective Field Theories

Bjorn O Lange

In this thesis we present an introduction to Soft-Collinear Effective Theory, which can be used to prove (or disprove) factorization theorems to all orders in the strong coupling c…

hep-ph2004★ 181 cited

Curing the Ills of Higgsless Models: the S Parameter and Unitarity

Giacomo Cacciapaglia, Csaba Csaki, Christophe Grojean +1

We consider various constraints on Higgsless models of electroweak symmetry breaking based on a bulk SU(2)_L x SU(2)_R x U(1)_{B-L} gauge group in warped space. First we show that…

hep-ph2004★ 1 cited

Precision Electroweak Physics and Higgsless Models in Warped Space

Giacomo Cacciapaglia

We study tree level corrections to precision electroweak physics in the recently proposed Higgsless models in warped space. Such models inherit from their similarity with technicol…

hep-ph2004★ 104 cited

Subleading Shape Functions in Inclusive B Decays

Stefan W. Bosch, Matthias Neubert, Gil Paz

The contributions of subleading shape functions to inclusive decay distributions of B mesons are derived from a systematic two-step matching of QCD current correlators onto soft-co…

hep-ph2004

QCD-Factorization of inclusive B decays and |Vub|

Bjorn O. Lange

Recent progress in the theoretical description of inclusive B to X_u l nu decays in the shape-function region is reported. Finite moments of the shape function are related to HQET…

hep-ph2004★ 43 cited

Constraining the Unitarity Triangle with B -> V gamma

Stefan W. Bosch, Gerhard Buchalla

We discuss the exclusive radiative decays , , and in QCD factorization within the Standard Model. The analysis is based on the heavy-quark limit of Q…

hep-ph2004

Soft-Collinear Factorization and the Calculation of the B->Xs+gamma Rate

Matthias Neubert

Using results on soft-collinear factorization for inclusive B-meson decay distributions, a systematic study of the partial B->Xs+gamma decay rate with a cut E_gamma<E_0 on photon e…

hep-ph2004★ 141 cited

Renormalization-Group Improved Calculation of the B->Xs+gamma Branching Ratio

Matthias Neubert

Using results on soft-collinear factorization for inclusive B-meson decay distributions, a systematic study of the partial decay rate with a cut on photon en…

hep-ph2004★ 38 cited

Gauge-Assisted Technicolor?

Maxim Perelstein

It is well known that technicolor models in which the electroweak symmetry is broken by QCD-like strong dynamics at the TeV scale generally predict unacceptably large corrections t…

hep-ph2004★ 31 cited

Implications of CP Asymmetries in

Michael Gronau, Jonathan L. Rosner

CP asymmetries in are studied by relating this process in broken flavor SU(3) with and . Using two different scenarios for SU(3)…

hep-ph2004★ 12 cited

Precision electroweak tests with scattering

Jonathan L. Rosner

Measurements of the cross section for elastic scattering with unprecedented precision have recently been proposed. The impact of these experiments for detecting poss…

hep-ph2004★ 1 cited

The Physics Case for an e^+ e^- Super B-Factory

Matthias Neubert

I share some personal reflections about the physics potential and the physics case that can be made for an e^+ e^- high-luminosity B-meson factory, as presented in my summary talk…

hep-ph2004★ 47 cited

Late Time Neutrino Masses, the LSND Experiment and the Cosmic Microwave Background

Z. Chacko, Lawrence J. Hall, Steven J. Oliver +1

Models with low-scale breaking of global symmetries in the neutrino sector provide an alternative to the seesaw mechanism for understanding why neutrinos are light. Such models can…

hep-ph2004★ 1 cited

Little Supersymmetry and the Supersymmetric Little Hierarchy Problem

Andreas Birkedal, Z. Chacko, Mary K. Gaillard

The current experimental lower bound on the Higgs mass significantly restricts the allowed parameter space in most realistic supersymmetric models, with the consequence that these…

hep-ph2004★ 187 cited

Charmless decays using flavor SU(3) symmetry

Cheng-Wei Chiang, Michael Gronau, Jonathan L. Rosner +1

The decays of mesons to a pair of charmless pseudoscalar () mesons are analyzed within a framework of flavor SU(3). Symmetry breaking is taken into account in tree () amp…

hep-ph2004★ 14 cited

Vector meson pair production in two-photon collisions near threshold

Jonathan L. Rosner

The cross sections for several processes exhibit strong enhancements near threshold, where denotes a vector meson. The pattern of these enhancements is not well unde…