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<td>Physics Colloquium Friday, November 21, 2014 - “The
E-906/SeaQuest Experiment at Fermilab” - Dr. Markus
Diefenthaler </td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date: </th>
<td>Mon, 17 Nov 2014 17:32:04 +0000</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From: </th>
<td>Wilkinson, Eleonor V <a class="moz-txt-link-rfc2396E" href="mailto:evwilk@wm.edu"><evwilk@wm.edu></a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td>'<a class="moz-txt-link-abbreviated" href="mailto:physics0607@physics.wm.edu">physics0607@physics.wm.edu</a>'
<a class="moz-txt-link-rfc2396E" href="mailto:physics0607@physics.wm.edu"><physics0607@physics.wm.edu></a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">CC: </th>
<td>'<a class="moz-txt-link-abbreviated" href="mailto:undergrads0607@physics.wm.edu">undergrads0607@physics.wm.edu</a>'
<a class="moz-txt-link-rfc2396E" href="mailto:undergrads0607@physics.wm.edu"><undergrads0607@physics.wm.edu></a></td>
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<div class="WordSection1">
<p class="MsoNormal"><b><u><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">PHYSICS
COLLOQUIUM</span></u></b><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">Friday, November
21, 2014</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">4:00 PM
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black;background:yellow;mso-highlight:yellow">Small
Hall, Room 111</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">Dr. Markus
Diefenthaler
</span></b><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">[Host: W.
Deconinck]<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">University of
Illinois-Urbana<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">Title of Talk:</span></b><o:p></o:p></p>
<p class="MsoNormal"><i><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">"The
E-906/SeaQuest Experiment at Fermilab"
<o:p></o:p></span></i></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:14.0pt;font-family:"Times New
Roman","serif";color:black">Abstract:</span></b><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">The nucleon is
one the the fundamental building blocks of the visible
universe. But many of its properties and how those
properties can be deduced from its inner structure are not
well understood. Deep-inelastic scattering (DIS) experiments
have revealed that the inner structure of the nucleon
consists of relativistic quarks that exchange gluons, and
have established quantum chromodynanics (QCD) as the theory
of the strong interaction between quarks and gluons. Due to
the confinement feature of the strong interaction and the
relativistic nature of the system, we cannot yet explain
many properties of the nucleon from first principles. Our
knowledge of the inner structure of the nucleon is to a
large extent based on the measurement of electroweak
processes such as DIS or the Drell-Yan process, which can be
interpreted within QCD.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">The
E-906/SeaQuest experiment at Fermilab continues a series of
Drell-Yan measurements to explore the antiquark content of
the nucleon and to study the modifications to nucleon
structure when the nucleon is embedded into a nuclei. To
extend existing measurements to larger values of Bjorken-x -
the momentum fraction of a quark within the nucleon - a 120
GeV proton beam extracted from Fermilab’s main injector is
used, resulting in 50 times more luminosity than previous
experiments and enabling access to values of x up to 0.9.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">An overview will
be presented of the key physics goals of the SeaQuest
collaboration: These include investigation of the dramatic
dbar/ubar flavor asymmetry in the nucleon sea and its
behavior at high x; study of the EMC effect in Drell-Yan
scattering and the unexpected absence of any antiquark
excess in existing data; and measurements of the angular
dependence of the Drell-Yan process, sensitive to spin-orbit
correlations within the nucleon. Updates to the SeaQuest
experiment with polarized beam (E-1027) and target (E-1039)
will allow us to study the quarks' spin-orbit correlations
within the nucleon and to provide complementary information
to existing data from DIS. The talk will conclude with a
status report on the ongoing data taking and analysis of
this new experiment.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><i><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black">*Cookies
& coffee will be served in Room 122 at 3:30 PM</span></i></b><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
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Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
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Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
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Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif";color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif";color:black">******</span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Monotype
Corsiva";color:#1F497D">Eleonor V. Wilkinson</span></b><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif"">Administrative
& Office Specialist
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif"">The
College of William & Mary-Physics<br>
Small Hall, Room 123<br>
300 Ukrop Way<br>
Williamsburg, VA 23185</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Times New
Roman","serif";color:black">Telephone:
757-221-3503</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Times New
Roman","serif";color:black">Fax: 757-221-3540</span><o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
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