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%Date: Tue, 16 Mar 93 11:56:15 PST
%Date (revised): Thu, 18 Mar 93 09:44:57 PST

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March 15, 1993   \hfill    LBL- 33816\\
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{\large \bf The Trace Anomaly in Chiral Dynamics: \\
$\gamma \gamma \rightarrow \pi^0\pi^0$ Scattering}\footnote
{This work was supported by the Director, Office of Energy
Research, Office of High Energy and Nuclear Physics, Division of High
Energy Physics of the U.S. Department of Energy under Contract
DE-AC03-76SF00098.}
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%\footnote{This work was supported in part by the Director, Office of
%Energy Research, Office of High Energy and Nuclear Physics, Division of
%High Energy Physics of the U.S. Department of Energy under Contract
%DE-AC03-76SF00098 and in part by the National Science Foundation under
%grant PHY90-21139.}

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Michael S. Chanowitz \\[.5in]

{\em Theoretical Physics Group\\
     Physics Division\\
     Lawrence Berkeley Laboratory\\
     1 Cyclotron Road\\
     Berkeley, California 94720}
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%{\em  Department of Physics\\
%      University of California\\
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%      Theoretical Physics Group\\
%      Physics Division\\
%      Lawrence Berkeley Laboratory\\
%      1 Cyclotron Road\\
%      Berkeley, California 94720}
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{\bf Disclaimer}
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This document was prepared as an account of work sponsored by the United
States Government.  Neither the United States Government nor any agency
thereof, nor The Regents of the University of California, nor any of their
employees, makes any warranty, express or implied, or assumes any legal
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imply its endorsement, recommendation, or favoring by the United States
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not be used for advertising or product endorsement purposes.
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{\it Lawrence Berkeley Laboratory is an equal opportunity employer.}
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