<div dir="ltr"><font face="arial, helvetica, sans-serif">Dear Colleagues,</font><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif"> Todays lunch seminar will be: Mikhail Solon</font></div>
<div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Abstract:</font></div><div><font face="arial, helvetica, sans-serif"><br>
</font></div><div><span style="color:rgb(0,0,0);line-height:19px"><font face="arial, helvetica, sans-serif">The discovery of a Standard Model-like Higgs boson and the hitherto absence of evidence for other new states may indicate that if WIMPs comprise cosmological dark matter, they are heavy compared to electroweak scale particles, M >> m_{W^\pm}, m_{Z^0}. In this limit, the absolute cross section for a WIMP of given electroweak quantum numbers to scatter from a nucleon becomes computable in terms of Standard Model parameters. We develop effective field theory techniques to analyze the heavy WIMP limit of WIMP-nucleon scattering, and present the first complete calculation of the leading spin-independent cross section in Standard Model extensions consisting of one or two electroweak SU(2)_W x U(1)_Y multiplets.</font></span><br clear="all">
<div><br></div><div><br></div>-- <br><div dir="ltr"><span style="color:rgb(136,136,136)">University of Chicago</span><br style="color:rgb(136,136,136)"><a href="http://hep.uchicago.edu/~johnda" target="_blank">http://hep.uchicago.edu/~johnda</a><br>
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