Muon capture on 3He and the weak structure of the nucleon

Doron Gazit

doi:10.1016/j.physletb.2008.08.008

Muon capture on ³He and the weak structure of the nucleon

Doron Gazit^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

The weak form factors of the nucleon, including the induced pseudoscalar form factor and second class terms, are constrained using a microscopic calculation of the weak capture process ³He (μ^-, ν_μ) ³H. The calculation is parameter free, and yields a rate of 1499 (16) Hz, in agreement with the remarkable experimental measurement 1496 (4) Hz. The nuclear wave functions are obtained using the EIHH method with the Argonne v₁₈ nucleon-nucleon potential and the Urbana-IX three nucleon force. The weak currents in the nuclei are described using HBχPT formalism. The induced pseudoscalar form factor is found to agree with HBχPT prediction. The result is compatible with vanishing second class currents, with the tightest constraint to date on the conservation of vector current (CVC) hypothesis.

Original language	English
Pages (from-to)	472-476
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	666
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2008.08.008
State	Published - 11 Sep 2008
Externally published	Yes

Bibliographical note

Funding Information:
The author acknowledges discussions with N. Barnea, N.T. Zinner, and W.C. Haxton. This work is supported by DOE grant number DE-FG02-00ER41132.

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10.1016/j.physletb.2008.08.008

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title = "Muon capture on 3He and the weak structure of the nucleon",

abstract = "The weak form factors of the nucleon, including the induced pseudoscalar form factor and second class terms, are constrained using a microscopic calculation of the weak capture process 3He (μ-, νμ) 3H. The calculation is parameter free, and yields a rate of 1499 (16) Hz, in agreement with the remarkable experimental measurement 1496 (4) Hz. The nuclear wave functions are obtained using the EIHH method with the Argonne v18 nucleon-nucleon potential and the Urbana-IX three nucleon force. The weak currents in the nuclei are described using HBχPT formalism. The induced pseudoscalar form factor is found to agree with HBχPT prediction. The result is compatible with vanishing second class currents, with the tightest constraint to date on the conservation of vector current (CVC) hypothesis.",

author = "Doron Gazit",

note = "Funding Information: The author acknowledges discussions with N. Barnea, N.T. Zinner, and W.C. Haxton. This work is supported by DOE grant number DE-FG02-00ER41132. ",

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AU - Gazit, Doron

N1 - Funding Information: The author acknowledges discussions with N. Barnea, N.T. Zinner, and W.C. Haxton. This work is supported by DOE grant number DE-FG02-00ER41132.

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Y1 - 2008/9/11

N2 - The weak form factors of the nucleon, including the induced pseudoscalar form factor and second class terms, are constrained using a microscopic calculation of the weak capture process 3He (μ-, νμ) 3H. The calculation is parameter free, and yields a rate of 1499 (16) Hz, in agreement with the remarkable experimental measurement 1496 (4) Hz. The nuclear wave functions are obtained using the EIHH method with the Argonne v18 nucleon-nucleon potential and the Urbana-IX three nucleon force. The weak currents in the nuclei are described using HBχPT formalism. The induced pseudoscalar form factor is found to agree with HBχPT prediction. The result is compatible with vanishing second class currents, with the tightest constraint to date on the conservation of vector current (CVC) hypothesis.

AB - The weak form factors of the nucleon, including the induced pseudoscalar form factor and second class terms, are constrained using a microscopic calculation of the weak capture process 3He (μ-, νμ) 3H. The calculation is parameter free, and yields a rate of 1499 (16) Hz, in agreement with the remarkable experimental measurement 1496 (4) Hz. The nuclear wave functions are obtained using the EIHH method with the Argonne v18 nucleon-nucleon potential and the Urbana-IX three nucleon force. The weak currents in the nuclei are described using HBχPT formalism. The induced pseudoscalar form factor is found to agree with HBχPT prediction. The result is compatible with vanishing second class currents, with the tightest constraint to date on the conservation of vector current (CVC) hypothesis.

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Muon capture on ³He and the weak structure of the nucleon

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