Showing 1998 · hep-phShow all

18 papers · 2 filters

hep-ph1998★ 47 cited

Diffractive Photoproduction of at HERA

L. L. Frankfurt, M. F. McDermott, M. Strikman

Predictions for the diffractive photoproduction of the -family at HERA energies, within the framework of the analysis by Frankfurt, Koepf and Strikman, are presented. Two novel…

hep-ph1998★ 10 cited

Diffractive production of charm and gluon nuclear shadowing

L. Alvero, L. Frankfurt, M. Strikman

We evaluate nuclear shadowing of the total cross section of charm particles production in DIS within the framework of the Gribov theory of nuclear shadowing using as input the rece…

hep-ph1998★ 19 cited

Hard Exclusive Electroproduction of Pseudoscalar Mesons and QCD axial anomaly

Michael I. Eides, Leonid L. Frankfurt, Mark I. Strikman

The hard exclusive electroproduction of mesons by the longitudinal photons is considered. We calculate the ratios of the yields for the electroproduction p…

hep-ph1998★ 14 cited

The Gluon Condensate in QCD at Finite Temperature

David E. Miller

We begin with the discussion of the relationship between the trace of the energy momentum tensor and the gluon condensate at finite temperatures. Using the recent numerical data fr…

hep-ph1998

Leptoquark Production and Identification at High Energy Lepton Colliders

Michael A. Doncheski, Stephen Godfrey

Leptoquarks can be produced in substantial numbers for masses very close to the collider centre of mass energy in , , and collisions due to the quark content o…

hep-ph1998★ 2 cited

QCD - looking forward

L. Frankfurt, M. Strikman

We outline theoretical ideas on the soft and hard dynamics of strong high-energy interactions and discuss promising directions for future high-energy experimental investigations in…

hep-ph1998★ 6 cited

Heavy quark limit in the light front quark model

N. B. Demchuk

An explicit relativistic light-front model is presented which gives the momentum transfer dependent form factors of weak hadronic currents among heavy pseudoscalar and vector meson…

hep-ph1998★ 14 cited

Factorization is not violated

John C. Collins, Davison E. Soper, George Sterman

We show that existing proofs of factorization imply the cancellation of certain multiladder contributions that Gotsman, Levin, and Maor had suggested would invalidate the basic fac…

hep-ph1998★ 26 cited

Deeply Virtual Compton Scattering at HERA - A Probe of Asymptotia

L. Frankfurt, A. Freund, M. Strikman

We demonstrate that the measurement of an azimuthal angle asymmetry in deeply virtual Compton scattering (DVCS) at HERA energies, is experimentally feasible and allows one to deter…

hep-ph1998★ 19 cited

Study of Nondiagonal Parton Distribution Models

Andreas Freund, Vadim Guzey

In this paper we examine predictions from different models of nondiagonal parton distributions. This will be achieved by examining whether certain predictions of relationships betw…

hep-ph1998★ 301 cited

Hard-scattering factorization with heavy quarks: A general treatment

J. C. Collins

A detailed proof of hard scattering factorization is given with the inclusion of heavy quark masses. Although the proof is explicitly given for deep-inelastic scattering, the metho…

hep-ph1998★ 5 cited

Radiation zeros and scalar particles beyond the standard model

M. A. Doncheski, R. W. Robinett

Standard radiation zeros arise from the factorization properties of tree-level amplitudes involving a massless photon and can occur when all charged particles in the initial and fi…

hep-ph1998★ 71 cited

Diffractive Production of Jets and Weak Bosons, and Tests of Hard-Scattering Factorization

Lyndon Alvero, John C. Collins, Juan Terron +1

We extract diffractive parton densities from data on diffractive deep inelastic scattering (DIS) and on diffractive photoproduction of jets. We explore the results of several ansae…

hep-ph1998★ 6 cited

Eliminating the low-mass axigluon window

M. A. Doncheski, R. W. Robinett

Using recent collider data, especially on the hadronic width the Z0, we exclude axigluons in the currently allowed low-mass window, namely axigluons in the mass range 50 GeV < M_A…

hep-ph1998★ 18 cited

Deconstructing Angular Correlations in ZH, ZZ, and WW Production at LEP2

Gregory Mahlon, Stephen Parke

We apply a generalized spin-basis analysis to associated Higgs production and gauge boson pair production at LEP. This framework allows us to identify a choice of spin axes for the…

hep-ph1998★ 1 cited

Methods in the LO Evolution of Nondiagonal Parton Distributions: The DGLAP Case

Andreas Freund, Vadim Guzey

In this paper, we discuss the algorithms used in the LO evolution program for nondiagonal parton distributions in the DGLAP region and discuss the stability of the code. Furthermor…

hep-ph1998★ 23 cited

Second Order in Mass Ratio Radiative-Recoil Corrections to Hyperfine Splitting in Muonium

Michael I. Eides, Howard Grotch, Valery A. Shelyuto

Radiative-recoil corrections to hyperfine splitting in muonium of orders and are calculated. These corrections are of the second order in t…

hep-ph1998★ 298 cited

Proof of Factorization for Deeply Virtual Compton Scattering in QCD

John C. Collins, Andreas Freund

We show that factorization holds for the deeply virtual Compton scattering amplitude in QCD, up to power suppressed terms, to all orders in perturbation theory. Furthermore, we sho…