Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>-Invariance Violation in the Inelastic Scattering of Electrons from a Polarized Proton Target
S. E. Rock(Lawrence Berkeley National Laboratory), M. Borghini(Lawrence Berkeley National Laboratory), O. Chamberlain(Lawrence Berkeley National Laboratory), R. Fuzesy(Lawrence Berkeley National Laboratory), C. C. Morehouse(University of California, Berkeley), T. D. Powell(Lawrence Berkeley National Laboratory), Gilbert Shapiro(Lawrence Berkeley National Laboratory), H. Weisberg(Lawrence Berkeley National Laboratory), R.L.A. Cottrell(Lawrence Berkeley National Laboratory), John Litt(Lawrence Berkeley National Laboratory), Luke W. Mo(Lawrence Berkeley National Laboratory), Richard E. Taylor(University of California, Berkeley)
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Abstract
We have searched for an asymmetry in the inelastic scattering of electrons from a polarized proton target in the region of resonance excitation, at values of four-momentum transfer squared of 0.4, 0.6, and 1.0 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. Data were also taken using an incident positron beam in order to distinguish any possible effect of time-reversal invariance violation from that due to higher-order (${\ensuremath{\alpha}}^{3}$) contributions to the scattering. No sizable violation of time-reversal invariance was found.
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