First Measurement of Form Factors of the Decay Ξ0Σ+eν¯e

A. Alavi-Harati et al. (KTeV Collaboration)
Phys. Rev. Lett. 87, 132001 – Published 11 September 2001
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Abstract

We present the first measurement of the form factor ratios g1/f1 (direct axial vector to vector), g2/f1 (second class current), and f2/f1 (weak magnetism) for the decay Ξ0Σ+eν¯e using the KTeV (E799) beam line and detector at Fermilab. From the Σ+ polarization measured with the decay Σ+pπ0 and the eν¯ correlation, we measure g1/f1 to be 1.32±0.170.21(stat)±0.05(syst), assuming the SU(3)f (flavor) values for g2/f1 and f2/f1. Our results are all consistent with exact SU(3)f symmetry.

  • Received 10 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.132001

©2001 American Physical Society

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Vol. 87, Iss. 13 — 24 September 2001

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