Measurement of parity violation in the elastic scattering of polarized electrons from ¹²C

Authors

• P. A. Souder, Syracuse University, Syracuse, New York
• R. Holmes, Syracuse University, Syracuse, New York
• D. - H. Kim, Syracuse University, Syracuse, New York
• K. S. Kumar, Syracuse University, Syracuse, New York
• M. E. Schulze, Syracuse University, Syracuse, New York
• K. Isakovich, Massachusetts Institute of Technology, Cambridge, Massachusetts
• G. W. Dodson, Massachusetts Institute of Technology, Cambridge, Massachusetts
• K. W. Dow, Massachusetts Institute of Technology, Cambridge, Massachusetts
• M. Farkhondeh, Massachusetts Institute of Technology, Cambridge, Massachusetts
• S. Kowalski, Massachusetts Institute of Technology, Cambridge, Massachusetts
• M. S. Lubell, City College of The City University of New York, New York, New York
• J. Bellanca, Harvard University, Cambridge, Massachusetts
• M. Goodman, Harvard University, Cambridge, Massachusetts
• S. Patch, Harvard University, Cambridge, Massachusetts
• Richard Wilson, Harvard University, Cambridge, Massachusetts
• G. D. Cates, Yale University, New Haven Connecticut
• S. Dhawan, Yale University, New Haven Connecticut
• Timothy J. Gay, University of Nebraska - LincolnFollow
• V. W. Hughes, Yale University, New Haven Connecticut
• A. Magnon, Yale University, New Haven Connecticut
• R. Michaels, Yale University, New Haven Connecticut
• H. R. Schaefer, Yale University, New Haven Connecticut

Document Type

Article

Date of this Version

August 1990

Comments

Published in Phys. Rev. Lett. 65, 694 - 697 (1990) [Issue 6 – August 1990]. ©1990 The American Physical Society. Used by permission.

Abstract

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from ¹²C nuclei. Our result is A_expt=0.60±0.14±0.02 ppm, where the first error is statistical and the second is systematic. With a beam polarization of 0.37, we compute the isoscalar vector hadronic coupling constant γ̃ to be 0.136±0.032±0.009. The standard model predicts γ̃ =0.155 at the tree level, in agreement with our data.