| Author(s): |
Jeffrey S. Nico; W M. Snow; Christopher D. Bass; Tiffany D. Bass; B. E. Crawford; K. F. Gan; B R. Heckel; D Lou; D M. Markoff; A M. Micherdzinska; Hans P. Mumm; A. K. Opper; M Sarsour; E I. Sharapov; H E. Swanson; S. C. Walbridge; V Zhumabekova; |
| Title: |
An Upper Bound on Parity Violating Neutron Spin Rotation in He-4 |
| Published: |
January 31, 2011 |
| Abstract: |
We report an upper bound on parity violating neutron spin rotation in He-4. This experiment is the most sensitive search for neutron weak optical activity yet performed. Our result for the neutron spin rotation angle per unit length in He-4 is dphi/dz = (+1.7 +/- 9.1(stat) +/- 1.4(sys))x10^{-7} rad/m. The statistical uncertainty is smaller than the best current estimates of the range of possible values of dphi/dz in n+He-4. The systematic uncertainty achieved using our experimental technique is small enough to encourage more precise measurements. |
| Citation: |
Physics Letters B |
| Pages: |
pp. 022501-1 - 022501-5 |
| Keywords: |
cold neutron; effective field theory; hadronic parity violation; weak interaction |
| Research Areas: |
Neutron Physics |
| PDF version: |
 Click here to retrieve PDF version of paper (230KB) |
