21 research outputs found
Coloron Phenomenology
A flavor-universal extension of the strong interactions was recently proposed
in response to the apparent excess of high- jets in the inclusive jet
spectrum measured at the Tevatron. This paper studies the color octet of
massive gauge bosons (`colorons') that is present in the low-energy spectrum of
the model's Higgs phase. Constraints from searches for new particles decaying
to dijets and from measurements of the weak-interaction parameter imply
that the colorons must have masses greater than 870-1000 GeV. The implications
of recent Tevatron data and the prospective input from future experiments are
also discussed.Comment: 13 pages, 4 embedded Postscript figures, LaTeX, full postscript
version also available at http://smyrd.bu.edu/htfigs/htfigs.html rectified
confusing phrase at end of sub-section on 'dijets
Aspects of four-jet production in polarized proton-proton collisions
We examine the intrinsic spin-dependence of the dominant subprocess contribution to four-jet production in polarized proton-proton
collisions using helicity amplitude techniques. We find that the partonic
level, longitudinal spin-spin asymmetry, , is intrinsically large
in the kinematic regions probed in experiments detecting four isolated jets.
Such events may provide another qualitative or semi-quantitative test of the
spin-structure of QCD in planned polarized collisions at RHIC.Comment: 9 pages, LaTeX, 2 uuencoded postscript files attache
W and Z Polarization Effects in Hadronic Collisions
A Monte Carlo study of the polar and azimuthal angular distributions of the
lepton pair arising from the decay of a or boson produced at high
transverse momentum in hadronic collisions is presented. In the absence of cuts
on the final state leptons, the lepton angular distribution in the gauge boson
rest frame is determined by the gauge boson polarization. Numerical results for
the lepton angular distributions in the Collins--Soper frame with acceptance
cuts and energy resolution smearing applied to the leptons are presented. In
the presence of cuts, the lepton angular distributions are dominated by
kinematic effects rather than polarization effects, however, some polarization
effects are still observable on top of the kinematic effects. Polarization
effects are highlighted when the experimental distributions are divided by the
Monte Carlo distributions obtained using isotropic gauge boson decay.Comment: 23 pages (LaTeX) plus 13 postscript figures, MAD/PH/834, UCD--94--23.
Figures are available from the authors or as a compressed tar file via
anonymous ftp at phenom.physics.wisc.edu in directory
~pup/preprints/madph-94-834-figs.tar.
Aspects of and Production in Polarized Proton-Proton Collisions
Several topics of relevance to low transverse momentum and
production in polarized proton-proton collisions
are discussed. The leading contributions to the low
production cross-sections via , , and
initial states are calculated as well as the corresponding spin-spin
asymmetries. We find that production increases relative to direct
and production, providing up to of the observable
pairs arising from decays in collisions at . The spin-dependence of production, however, is much smaller
than for either direct or production and so will likely be far
less useful than either process in probing the polarized gluon structure
function of the proton. A subset of the radiative
corrections to production involving initial state quarks are also
performed and compared to leading order predictions.Comment: 21 pages + 5 postscript figures (included), OCIP/C-94-
âLower than a Snakeâs Bellyâ : Discursive Constructions of Dignity and Heroism in Low-Status Garbage Work
In this paper, we consider how dignity is discursively constructed in the context of work dominated by physicality and dirt. Based on semi-structured interviews with garbage workers, our analysis considers how the deprivations they experience are cast through discourses intended to construct their individual and collective worth. We consider the manner in which dignity maybe denied to such workers through popular repudiations of individuality and status. We demonstrate how this positioning arises from contact with physical dirt, and associations with socially dirty work based on ascriptions of servility, abuse and ambivalence. We go on to consider how garbage workers respond to this positioning through discourses of âeveryday heroismâ. Heroism is evoked through three interrelated narratives that speaks to a particular type of masculinity. The first takes the form of a classic process of reframing and recalibration through which workers not only renegotiate their public position and status, but also point to the inherent value to be had in working with dirt as part of that which we identify as a process of âaffirmationâ. The second narrative arises from the imposition of favourable social and occupational comparisons that effectively elevate garbage collectorsâ social position. The third discourseâand previously unobserved in respect of garbage workâcentres on paternalistic practices of care. Combined, these discourses disrupt the generally held view that dirty work is antithetical to heroism and wounds dignity
âLower than a snakeâs bellyâ : discursive constructions of dignity and heroism in low-status garbage work.
In this paper, we consider how dignity is discursively constructed in the context of work dominated by physicality and dirt. Based on semi-structured interviews with garbage workers, our analysis considers how the deprivations they experience are cast through discourses intended to construct their individual and collective worth. We consider the manner in which dignity maybe denied to such workers through popular repudiations of individuality and status. We demonstrate how this positioning arises from contact with physical dirt, and associations with socially dirty work based on ascriptions of servility, abuse and ambivalence. We go on to consider how garbage workers respond to this positioning through discourses of âeveryday heroismâ. Heroism is evoked through three inter-related narratives that speaks to a particular type of masculinity. The first takes the form of a classic process of reframing and recalibration through which workers not only renegotiate their public position and status, but also point to the inherent value to be had in working with dirt as part of that which we identify as a process of âaffirmationâ. The second narrative arises from the imposition of favourable social and occupational comparisons that effectively elevate garbage collectorsâ social position. The third discourseâand previously unobserved in respect of garbage workâcentres on paternalistic practices of care. Combined, these discourses disrupt the generally held view that dirty work is antithetical to heroism and wounds dignity
x-Dependent Polarized Parton Distributions
Using QCD motivated and phenomenological considerations, we construct x-
dependent polarized parton distributions, which evolve under GLAP evolution,
satisfy DIS data and are within positivity constraints. Each flavor is done
separately and the overall set can be used to predict polarization asymmetries
for various processes. We perform our NLO analysis strictly in x space,
avoiding difficulties in moment inversion. Small-x results and other physical
considerations are discussed.Comment: 30 pages, 11 Postscript figure
What We Can Learn About Nucleon Spin Structure From Recent Data
We have used recent polarized deep-inelastic scattering data from CERN and
SLAC to extract information about nucleon spin structure. We find that the SMC
proton data, the E142 neutron data and the deuteron data from SMC and E143 give
different results for fractions of the spin carried by each of the
constituents. These appear to lead to two different and incompatible models for
the polarized strange sea. The polarized gluon distribution occuring in the
gluon anomaly does not have to be large in order to be consistent with either
set of experimental data. However, it appears that the discrepancies in the
implications of these data cannot be resolved with any simple theoretical
arguments. We conclude that more experiments must be performed in order to
adequately determine the fraction of spin carried by each of the nucleon
constituents.Comment: 23 page