129 research outputs found
Artful Manipulation: The Rockefeller Family and Cold War America
My dissertation, Artful Manipulation: The Rockefeller Family and Cold War America, examines how the Rockefeller family used the Museum of Modern Art, Colonial Williamsburg, and the Abby Aldrich Rockefeller Folk Art Collection to shape opinions about America, both at home and abroad, during the early years of the Cold War. The work done at Colonial Williamsburg tied the Rockefeller name to the foundations of American society and, later, to the spread of global democracy in the Cold War world. The establishment of a new museum for the Abby Aldrich Rockefeller Folk Art collection in 1957 renewed the narrative that American folk art was the basis for American modern art, thus creating a legacy of creative cultural production that could match America\u27s Cold War economic and military power. A close reading of the Museum of Modern Art\u27s famous 1955 Family of Man exhibition shows how the Rockefellers promoted America as the head of the post-war global family. The show, a large scale photography exhibition, glorified universal humanism as the only option for global peace after World War II. The implicit message of the show, which traveled nationally and internationally through 1962, was that Americans would lead the free world in the second half of the twentieth century. In their insistence on shaping American society in their view, the Rockefellers shut out dissenting opinions and alternative narratives about American culture. A consideration of James Baldwin and Richard Avedon\u27s 1964 photo-text Nothing Personal is then offered as a rebuttal to the narrative of modern American culture endorsed by the Rockefellers. In Nothing Personal, James Baldwin\u27s essays and Richard Avedon\u27s photographs signify on the narrative of white domination, the same narrative evoked across the Rockefellers\u27 institutions. Juxtaposing Nothing Personal against the hegemonic work of the Rockefellers\u27 cultural organizations offers readers a consideration of how narratives of exclusion necessitate and give life to narratives of resistance
Energy flows in deep inelastic scattering at HERA
The transverse hadronic energy flow has been measured in DIS events detected in the 1993 and 1994 running periods at ZEUS on the HERA ring. The flow has been measured in Q2 and y bins throughout the kinematic range available at HERA for diffractive and non-diffractive events. The flow measurement has been made using the ZEUS calorimeter with special attention paid to the very forward region of the component: this is the region which maps to the y*p central region at low x and low Q2 the region where an energy flow measurement is considered to be an unambiguous signal for the presence of BFKL dynamics. In the measurement of these flows, a geometric unfolding procedure rather than a bin-to-bin correction has been developed. Various sources of experimental systematic error are discussed and their effects estimated. The level of transverse energy flow is found to be generally well described by the colour dipole model but not by the matrix element parton shower simulation. The shape of the transverse energy flow in the current jet region at low x and low Q2 is not well described by any model used. An unambiguous signal for BFKL dynamics has not been found in this analysis mainly as a result of uncertainties in parton fragmentation
D* Production in Deep Inelastic Scattering at HERA
This paper presents measurements of D^{*\pm} production in deep inelastic
scattering from collisions between 27.5 GeV positrons and 820 GeV protons. The
data have been taken with the ZEUS detector at HERA. The decay channel
(+ c.c.) has been used in the study. The
cross section for inclusive D^{*\pm} production with
and is 5.3 \pms 1.0 \pms 0.8 nb in the kinematic region
{ GeV and }. Differential cross
sections as functions of p_T(D^{*\pm}), and are
compared with next-to-leading order QCD calculations based on the photon-gluon
fusion production mechanism. After an extrapolation of the cross section to the
full kinematic region in p_T(D^{*\pm}) and (D^{*\pm}), the charm
contribution to the proton structure function is
determined for Bjorken between 2 10 and 5 10.Comment: 17 pages including 4 figure
Observation of hard scattering in photoproduction events with a large rapidity gap at HERA
Events with a large rapidity gap and total transverse energy greater than 5
GeV have been observed in quasi-real photoproduction at HERA with the ZEUS
detector. The distribution of these events as a function of the
centre of mass energy is consistent with diffractive scattering. For total
transverse energies above 12 GeV, the hadronic final states show predominantly
a two-jet structure with each jet having a transverse energy greater than 4
GeV. For the two-jet events, little energy flow is found outside the jets. This
observation is consistent with the hard scattering of a quasi-real photon with
a colourless object in the proton.Comment: 19 pages, latex, 4 figures appended as uuencoded fil
Measurement of the diffractive structure function in deep inelastic scattering at HERA
This paper presents an analysis of the inclusive properties of diffractive
deep inelastic scattering events produced in interactions at HERA. The
events are characterised by a rapidity gap between the outgoing proton system
and the remaining hadronic system. Inclusive distributions are presented and
compared with Monte Carlo models for diffractive processes. The data are
consistent with models where the pomeron structure function has a hard and a
soft contribution. The diffractive structure function is measured as a function
of \xpom, the momentum fraction lost by the proton, of , the momentum
fraction of the struck quark with respect to \xpom, and of . The \xpom
dependence is consistent with the form \xpoma where
in all bins of and
. In the measured range, the diffractive structure function
approximately scales with at fixed . In an Ingelman-Schlein type
model, where commonly used pomeron flux factor normalisations are assumed, it
is found that the quarks within the pomeron do not saturate the momentum sum
rule.Comment: 36 pages, latex, 11 figures appended as uuencoded fil
Measurement of the F2 structure function in deep inelastic ep scattering using 1994 data from the ZEUS detector at HERA
We present measurements of the structure function \Ft\ in e^+p scattering at HERA in the range 3.5\;\Gevsq < \qsd < 5000\;\Gevsq. A new reconstruction method has allowed a significant improvement in the resolution of the kinematic variables and an extension of the kinematic region covered by the experiment. At \qsd < 35 \;\Gevsq the range in x now spans 6.3\cdot 10^{-5} < x < 0.08 providing overlap with measurements from fixed target experiments. At values of Q^2 above 1000 GeV^2 the x range extends to 0.5. Systematic errors below 5\perc\ have been achieved for most of the kinematic urray, W
Observation of Events with an Energetic Forward Neutron in Deep Inelastic Scattering at HERA
In deep inelastic neutral current scattering of positrons and protons at the center of mass energy of 300 GeV, we observe, with the ZEUS detector, events with a high energy neutron produced at very small scattering angles with respect to the proton direction. The events constitute a fixed fraction of the deep inelastic, neutral current event sample independent of Bjorken x and Q2 in the range 3 · 10-4 \u3c xBJ \u3c 6 · 10-3 and 10 \u3c Q2 \u3c 100 GeV2
Comparison of ZEUS data with standard model predictions for scattering at high and
Using the ZEUS detector at HERA, we have studied the reaction e(+)p --> e(+)X for Q(2) > 5000 GeV2 with a 20.1 pb(-1) data sample collected during the years 1993 to 1996. For Q(2) below 15000 GeV2, the data are in good agreement with Standard Model expectations. For Q(2) > 35000 GeV2. two events are observed while 0.145 +/- 0.013 events are expected, A statistical analysis of a large ensemble of simulated Standard Model experiments indicates that with probability 6.0%, an excess at least as unlikely as that observed would occur above some Q(2) cut. For x > 0.55 and y > 0.75, four events are observed where 0.91 +/- 0.08 events are expected, A statistical analysis of the two-dimensional distribution of the events in x and y yields a probability of 0.72% for the region x > 0.55 and y > 0.25 and a probability of 7.8% for the entire Q(2) > 5000 GeV2 data sample. The observed excess above Standard Model expectations is particularly interesting because it occurs in a previously unexplored kinematic region
Measurement of Elastic Photoproduction at HERA
The production of mesons in the reaction () at a median of $10^{-4} \
\rm{GeV^2}\phid\sigma/dt0.1<|t|<0.5 \ \rm{GeV^2}60 <
W < 80 \ \rm{GeV}\sigma_{\gamma p
\rightarrow \phi p} = 0.96 \pm 0.19^{+0.21}_{-0.18}\rm{\mu b}\sigma_{\gamma p \rightarrow
\phi p}t\phis\phi$ photoproduction are
compatible with those of a soft diffractive process.Comment: 23 pages, including 6 post script figure
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