2,993 research outputs found
QCD Phenomenology of Charm Production at HERA
We compare different schemes for the treatment of heavy quark production in
Deep-Inelastic Scattering (DIS). For fully-integrated quantities such as
, we advocate the use of the General-Massive
Variable-Flavor-Number (GM-VFN) scheme; we present some results showing the
progress of a Next-to-Leading Order calculation in this scheme. For
differential quantities, the Fixed-Flavor-Number (FFN) scheme provides a more
appropriate starting point. We present a new calculation of the azimuthal
distribution of charm quark production in DIS. All results have been obtained
using a Monte Carlo program under development.Comment: 5 pages, Latex/aipproc, 4 figures, presented at DIS 97, Chicago, IL,
April 14-18,199
An Effective Higgsless Theory: Satisfying Electroweak Constraints and a Heavy Top Quark
The main challenge faced by Higgsless models of electroweak symmetry breaking
is to reconcile the experimental constraints imposed by the precision
electroweak data and the top quark phenomenology with the unitarity constraints
imposed by longitudinal gauge boson scattering amplitudes. In this paper we
expand on previous work, giving details of how delocalized fermions can be used
to adjust the parameter to zero, while keeping the and parameters
naturally suppressed. We also show that it is possible to obtain the top quark
mass, without affecting the delay of unitarity violation of the scattering amplitude, by separating the mass scales of the fermion
sector () from that of the gauge sector (). The fermion sector
scale is only weakly constrained by unitarity of the scattering amplitude; thus the ratio can be quite large, and the
top mass can be easily achieved. Anomalous right-handed couplings involving the
third generation quarks also avoid constraints from experimental data if
is sufficiently large.Comment: 26 pages, JHEP forma
Transverse Momentum Distributions in Large-rapidity Dijet Production at the Tevatron
In this contribution we examine the transverse momentum distributions in
dijet production at large rapidity intervals at the Tevatron, using the BFKL
resummation.Comment: 6 pages (1 uu-compressed encapsulated PS figure appended), DESY
94-163, SCIPP 94/2
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