<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>D.B. Gustavson</dc:contributor>
  <dc:contributor>D.M. Ritson</dc:contributor>
  <dc:contributor>G.A. Weitsch</dc:contributor>
  <dc:contributor>H.J. Halpern</dc:contributor>
  <dc:contributor>R. Prepost</dc:contributor>
  <dc:contributor>Donald H. Tompkins</dc:contributor>
  <dc:contributor>D.E. Wiser</dc:contributor>
  <dc:creator>R.L. Anderson</dc:creator>
  <dc:date>1976</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Exclusive photoproduction cross sections have been measured for the processes&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-3-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-7" class="mjx-math"&gt;&lt;span id="MJXc-Node-8" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-9" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-10" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-11" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-12" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-13" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-14" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-15" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-16" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;π&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-17" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-18" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;+&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-19" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;n&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-4-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-20" class="mjx-math"&gt;&lt;span id="MJXc-Node-21" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-22" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-23" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-24" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-25" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-26" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-27" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-28" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-29" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;π&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-30" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-31" class="mjx-mn"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-32" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-5-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-33" class="mjx-math"&gt;&lt;span id="MJXc-Node-34" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-35" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-36" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-37" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-38" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-39" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-40" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-41" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-42" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;π&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-43" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-44" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;−&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-45" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-46" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-47" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-48" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;Δ&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-49" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-50" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;+&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-51" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;+&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-6-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-52" class="mjx-math"&gt;&lt;span id="MJXc-Node-53" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-54" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-55" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-56" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-57" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-58" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-59" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-60" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-61" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;ρ&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-62" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-63" class="mjx-mn"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-64" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-7-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-65" class="mjx-math"&gt;&lt;span id="MJXc-Node-66" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-67" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-68" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-69" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-70" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-71" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-72" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-73" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-74" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;K&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-75" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-76" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;+&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-77" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;Λ&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;, and&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-8-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-78" class="mjx-math"&gt;&lt;span id="MJXc-Node-79" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-80" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;γ&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-81" class="mjx-mi"&gt;&lt;/span&gt;&lt;span id="MJXc-Node-82" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;p&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-83" class="mjx-mo MJXc-space3"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;→&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-84" class="mjx-mrow MJXc-space3"&gt;&lt;span id="MJXc-Node-85" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-86" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-87" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;K&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-88" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-89" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;+&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-90" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-91" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-92" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-93" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;Σ&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-94" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-95" class="mjx-mn"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;at large&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-9-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-96" class="mjx-math"&gt;&lt;span id="MJXc-Node-97" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-98" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;t&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-10-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-99" class="mjx-math"&gt;&lt;span id="MJXc-Node-100" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-101" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;u&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;values at several energies for each process between 4 and 7.5 GeV. These measurements taken together with past data taken at small values of&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-11-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-102" class="mjx-math"&gt;&lt;span id="MJXc-Node-103" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-104" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;t&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-12-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-105" class="mjx-math"&gt;&lt;span id="MJXc-Node-106" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-107" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;u&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;provide complete angular distributions. The data show the usual small&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-13-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-108" class="mjx-math"&gt;&lt;span id="MJXc-Node-109" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-110" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;t&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-14-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-111" class="mjx-math"&gt;&lt;span id="MJXc-Node-112" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-113" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;u&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;peaks and a central region in which the cross section decreases approximately as&amp;nbsp;&lt;/span&gt;&lt;span class="aps-inline-formula"&gt;&lt;span id="MathJax-Element-15-Frame" class="mjx-chtml MathJax_CHTML"&gt;&lt;span id="MJXc-Node-114" class="mjx-math"&gt;&lt;span id="MJXc-Node-115" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-116" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-117" class="mjx-msup"&gt;&lt;span class="mjx-base"&gt;&lt;span id="MJXc-Node-118" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-119" class="mjx-mi"&gt;&lt;span class="mjx-char MJXc-TeX-math-I"&gt;s&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="mjx-sup"&gt;&lt;span id="MJXc-Node-120" class="mjx-mrow"&gt;&lt;span id="MJXc-Node-121" class="mjx-mo"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;−&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-122" class="mjx-mn"&gt;&lt;span class="mjx-char MJXc-TeX-main-R"&gt;7&lt;/span&gt;&lt;/span&gt;&lt;span id="MJXc-Node-123" class="mjx-mn"&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;. The results are discussed within the context of parton or constituent models.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1103/PhysRevD.14.679</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>APS Physics</dc:publisher>
  <dc:title>Measurements of exclusive photoproduction processes at large values of t and u from 4 to 7.5 GeV</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>