The emiT Experiment: A Search for Time Reversal Invarience Violation in Polarized Neutron Beta Decay

Details The emiT Experiment: A Search for Time Reversal Invarience Violation in Polarized Neutron Beta Decay The emiT Experiment: A Search for Time Reversal Invarience Violation in Polarized Neutron Beta Decay

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.d2004m&link_type=abstract

American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #D2.004

Physics

Scientific paper

The emiT experiment tests time reversal symmetry in the β-decay of polarized free neutrons by searching for the T-odd, P-even triple correlation (the product of the neutron spin and cross product of decay product momenta). The detection of this correlation above the small effect from final state interactions would be a direct indication of time reversal symmetry violation, independent of charge conjugation-parity. A Number of extensions to the Standard Model, such as lepto-quarks, can give rise to this correlation yet do not generate measurable electric dipole moments (EDMs). Consequently, the emiT experiment is complementary to EDM measurements, and, it is important to place the strongest possible limits in neutron decay. The emiT collaboration has published a result [1] from its first run. A second run of the emiT experiment has recently been completed. We will discuss the analysis and constraints on time reversal violation obtained from this greatly improved data set. This work was supported by the National Institute of Standards and Technology, the US DOE Office of Nuclear Physics, and the NSF Division of Physics. [1] Phys. Rev. C. 62, 055501, (2000).

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