First measurement of form factors of the decay Ξ0 → Σ+ e− ν¯e

KTeV Collaboration

doi:10.1103/PhysRevLett.87.132001

First measurement of form factors of the decay Ξ⁰ → Σ⁺ e⁻ ν^¯_e

KTeV Collaboration

Physics

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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 Ξ⁰ → Σ⁺ e⁻ ν^¯_e using the KTeV (E799) beam line and detector at Fermilab. From the Σ⁺ polarization measured with the decay Σ⁺ pπ⁰ and the e⁻ − ν^¯ correlation, we measure g₁/f₁ to be 1.32 ±^0.21_0.17 (stat) ± 0.05 (syst), ssuming the SU (3)_f (flavor) values for g₂/f₁ and f₂ / f₁. Our results are all consistent with exact SU (3)_f symmetry.

Original language	English (US)
Pages (from-to)	132001-1-132001-4
Journal	Physical review letters
Volume	87
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.87.132001
State	Published - Sep 24 2001

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.87.132001

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@article{bc6f9bcdc1db4768bfd3904f25a12794,

title = "First measurement of form factors of the decay Ξ0 → Σ+ e− ν¯e",

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 Ξ0 → Σ+ e− ν¯e using the KTeV (E799) beam line and detector at Fermilab. From the Σ+ polarization measured with the decay Σ+ pπ0 and the e− − ν¯ correlation, we measure g1/f1 to be 1.32 ±0.210.17 (stat) ± 0.05 (syst), ssuming the SU (3)f (flavor) values for g2/f1 and f2 / f1. Our results are all consistent with exact SU (3)f symmetry.",

author = "\{KTeV Collaboration\} and A. Alavi-Harati and T. Alexopoulos and M. Arenton and K. Arisaka and S. Averitte and Barbosa, \{R. F.\} and Barker, \{A. R.\} and M. Barrio and L. Bellantoni and A. Bellavance and J. Belz and R. Ben-David and Bergman, \{D. R.\} and E. Blucher and Bock, \{G. J.\} and C. Bown and S. Bright and E. Cheu and S. Childress and R. Coleman and Corcoran, \{M. D.\} and G. Corti and B. Cox and Crisler, \{M. B.\} and Erwin, \{A. R.\} and R. Ford and A. Glazov and A. Golossanov and G. Graham and J. Graham and K. Hagan and E. Halkiadakis and J. Hamm and K. Hanagaki and S. Hidaka and Hsiung, \{Y. B.\} and V. Jejer and Jensen, \{D. A.\} and R. Kessler and Kobrak, \{H. G.E.\} and J. LaDue and A. Lath and A. Ledovskoy and McBride, \{P. L.\} and P. Mikelsons and E. Monnier and T. Nakaya and Nelson, \{K. S.\} and H. Nguyen and V. O{\textquoteright}dell",

year = "2001",

month = sep,

day = "24",

doi = "10.1103/PhysRevLett.87.132001",

language = "English (US)",

volume = "87",

pages = "132001--1--132001--4",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "13",

}

TY - JOUR

T1 - First measurement of form factors of the decay Ξ0 → Σ+ e− ν¯e

AU - KTeV Collaboration

AU - Alavi-Harati, A.

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Arisaka, K.

AU - Averitte, S.

AU - Barbosa, R. F.

AU - Barker, A. R.

AU - Barrio, M.

AU - Bellantoni, L.

AU - Bellavance, A.

AU - Belz, J.

AU - Ben-David, R.

AU - Bergman, D. R.

AU - Blucher, E.

AU - Bock, G. J.

AU - Bown, C.

AU - Bright, S.

AU - Cheu, E.

AU - Childress, S.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Corti, G.

AU - Cox, B.

AU - Crisler, M. B.

AU - Erwin, A. R.

AU - Ford, R.

AU - Glazov, A.

AU - Golossanov, A.

AU - Graham, G.

AU - Graham, J.

AU - Hagan, K.

AU - Halkiadakis, E.

AU - Hamm, J.

AU - Hanagaki, K.

AU - Hidaka, S.

AU - Hsiung, Y. B.

AU - Jejer, V.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kobrak, H. G.E.

AU - LaDue, J.

AU - Lath, A.

AU - Ledovskoy, A.

AU - McBride, P. L.

AU - Mikelsons, P.

AU - Monnier, E.

AU - Nakaya, T.

AU - Nelson, K. S.

AU - Nguyen, H.

AU - O’dell, V.

PY - 2001/9/24

Y1 - 2001/9/24

N2 - 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 Ξ0 → Σ+ e− ν¯e using the KTeV (E799) beam line and detector at Fermilab. From the Σ+ polarization measured with the decay Σ+ pπ0 and the e− − ν¯ correlation, we measure g1/f1 to be 1.32 ±0.210.17 (stat) ± 0.05 (syst), ssuming the SU (3)f (flavor) values for g2/f1 and f2 / f1. Our results are all consistent with exact SU (3)f symmetry.

AB - 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 Ξ0 → Σ+ e− ν¯e using the KTeV (E799) beam line and detector at Fermilab. From the Σ+ polarization measured with the decay Σ+ pπ0 and the e− − ν¯ correlation, we measure g1/f1 to be 1.32 ±0.210.17 (stat) ± 0.05 (syst), ssuming the SU (3)f (flavor) values for g2/f1 and f2 / f1. Our results are all consistent with exact SU (3)f symmetry.

UR - https://www.scopus.com/pages/publications/85037212844

UR - https://www.scopus.com/pages/publications/85037212844#tab=citedBy

U2 - 10.1103/PhysRevLett.87.132001

DO - 10.1103/PhysRevLett.87.132001

M3 - Article

AN - SCOPUS:85037212844

SN - 0031-9007

VL - 87

SP - 132001-1-132001-4

JO - Physical review letters

JF - Physical review letters

IS - 13

ER -

First measurement of form factors of the decay Ξ⁰ → Σ⁺ e⁻ ν^¯_e

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