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19912026
Showing 1999 · hep-phShow all

65 papers · 2 filters

hep-ph1999★ 2 cited

Soft Colour Exchanges and the Hadronic Final State

A. Edin, G. Ingelman, J. Rathsman

The models for soft colour interactions and colour string re-interactions, implemented in the Monte Carlo program LEPTO, are investigated regarding hadronic final states in inclusi…

hep-ph1999

Soft Colour Interactions in Non-perturbative QCD

G. Ingelman, A. Edin, R. Enberg +2

Improved understanding of non-perturbative QCD dynamics can be obtained in terms of soft colour exchange models. Their essence is the variation of colour string-field topologies gi…

hep-ph1999★ 4 cited

Rapidity Gaps from Colour String Topologies

G. Ingelman, A. Edin, R. Enberg +2

Diffractive deep inelastic scattering at HERA and diffractive W and jet production at the Tevatron are well described by soft colour exchange models. Their essence is the variation…

hep-ph1999★ 83 cited

Single Top Quark Production at the LHC: Understanding Spin

Gregory Mahlon, Stephen Parke

We show that the single top quarks produced in the Wg-fusion channel at a proton-proton collider at a center-of-mass energy sqrt{s}=14 TeV posses a high degree of polarization in t…

hep-ph1999★ 175 cited

Yukawa Hierarchies from Split Fermions in Extra Dimensions

Eugene A. Mirabelli, Martin Schmaltz

We explore a mechanism for generating the Yukawa hierarchies by displacing the left- and right-handed components of the Standard Model fermions in a higher-dimensional space. We fi…

hep-ph1999★ 32 cited

The perturbative limit of the two-pion distribution amplitude

M. Diehl, Th. Feldmann, P. Kroll +1

We consider pion pair production in two-photon collisions, gamma* gamma -> pi+ pi-, at large photon virtuality Q^2 and center-of-mass energy \sqrt{s} in the hard-scattering picture…

hep-ph1999★ 1 cited

Hadronic Effects in Two-Body B decays

Helen Quinn

In these lectures I discuss the impact of soft hadronic physics on predictions for B decays. Unfortunately our tools for calculating these effects are limited; even after the use o…

hep-ph1999★ 76 cited

Quark Orbital Angular Momentum from Lattice QCD

N. Mathur, S. J. Dong, K. F. Liu +2

We calculate the quark orbital angular momentum of the nucleon from the quark energy-momentum tensor form factors on the lattice. The disconnected insertion is estimated stochastic…

hep-ph1999★ 57 cited

Impact of D0-D0bar mixing on the experimental determination of gamma

Joao P Silva, Abner Soffer

Several methods have been devised to measure the weak phase gamma using decays of the type B+- --> D K+-, where it is assumed that there is no mixing in the D0-D0bar system. Howeve…

hep-ph1999★ 1.1k cited

The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions

S. Jadach, B. F. L. Ward, Z. Was

We present the Monte Carlo event generator KK version 4.13 for precision predictions of the Electroweak Standard Model for the process , a…

hep-ph1999★ 459 cited

Bulk Gauge Fields in the Randall-Sundrum Model

H. Davoudiasl, J. L. Hewett, T. G. Rizzo

We explore the consequences of placing the Standard Model gauge fields in the bulk of the recently proposed localized gravity model of Randall and Sundrum. We find that the Kaluza…

hep-ph1999★ 390 cited

Supersymmetry Breaking through Transparent Extra Dimensions

D. Elazzar Kaplan, Graham D. Kribs, Martin Schmaltz

We propose a new framework for mediating supersymmetry breaking through an extra dimension. It predicts positive scalar masses and solves the supersymmetric flavor problem. Supersy…

hep-ph1999★ 100 cited

The three loop slope of the Dirac form factor and the 1S Lamb shift in hydrogen

Kirill Melnikov, Timo van Ritbergen

The last unknown contribution to hydrogen energy levels at order m alpha ^7, due to the slope of the Dirac form factor at three loops, is evaluated in a closed analytical form. The…

hep-ph1999★ 2 cited

Kaluza-Klein Physics at Muon Colliders

Thomas G. Rizzo

We discuss the physics of Kaluza-Klein excitations of the Standard Model gauge bosons that can be explored by a high energy muon collider in the era after the LHC and TeV Linear Co…

hep-ph1999★ 79 cited

Trojan Penguins and Isospin Violation in Hadronic B Decays

Yuval Grossman, Alexander L. Kagan, Matthias Neubert

Some rare hadronic decays of B mesons, such as B->pi K, are sensitive to isospin-violating contributions from physics beyond the Standard Model. Although commonly referred to as el…

hep-ph1999★ 404 cited

New Color Decompositions for Gauge Amplitudes at Tree and Loop Level

Vittorio Del Duca, Lance Dixon, Fabio Maltoni

Recently, a color decomposition using structure constants was introduced for purely gluonic tree amplitudes, in a compact form involving only the linearly independent subamplitudes…

hep-ph1999★ 30 cited

alpha^2 corrections to parapositronium decay: a detailed description

Andrzej Czarnecki, Kirill Melnikov, Alexander Yelkhovsky

We present details of our recent calculation of alpha^2 corrections to the parapositronium decay into two photons. These corrections are rather small and our final result for the p…

hep-ph1999★ 7 cited

Model-independent information on gamma from B^+- -> pi K Decays

Matthias Neubert

Measurements of the rates for the hadronic decays B^+- -> pi K can be used to derive information on the weak phase gamma=arg(V_ub^*) in a largely model-independent way. Hadronic un…

hep-ph1999★ 20 cited

Resonant Two-body D Decays

Michael Gronau

The contribution of a resonance to is calculated by applying the soft pion theorem to , and is found to be about 30% of the measu…

hep-ph1999★ 2 cited

Chiral Boson Theory on the Light-Front

Prem P. Srivastava

The {\it front form} framework for describing the quantized theory of chiral boson is discussed. It avoids the conflict with the requirement of the principle of microcausality as i…

hep-ph1999★ 88 cited

Split Fermions in Extra Dimensions and Exponentially Small Cross-Sections at Future Colliders

Nima Arkani-Hamed, Yuval Grossman, Martin Schmaltz

We point out a dramatic new experimental signature for a class of theories with extra dimensions, where quarks and leptons are localized at slightly separated parallel ``walls'' wh…

hep-ph1999★ 74 cited

Can lepton flavor violating interactions explain the atmospheric neutrino problem?

Sven Bergmann, Yuval Grossman, Damien M. Pierce

We investigate whether flavor changing neutrino interactions (FCNIs) can be sufficiently large to provide a viable solution to the atmospheric neutrino problem. Effective operators…

hep-ph1999

Perturbative QCD relations inspired by hypothetical tau leptons

J. R. Pelaez, S. J. Brodsky, C. Merino +1

We review our recent works on tests of perturbative QCD, inspired by the relation between the hadronic decay of the tau lepton and the e+ e- annihilation into hadrons. First, we pr…

hep-ph1999★ 440 cited

Warped Phenomenology

H. Davoudiasl, J. L. Hewett, T. G. Rizzo

We explore the phenomenology associated with the recently proposed localized gravity model of Randall and Sundrum where gravity propagates in a 5-dimensional non-factorizable geome…