New Possibilities for Measuring the Ratio of the Axial and Vector Weak Interaction Constants

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An experiment is being developed to determine the value of λ, the ratio of the axial weak interaction constant GA to the vector constant GV, by simultaneously measuring the electron (A) and neutrino (B) asymmetries of β-decay on the same setup. The λ measurement is based on the ratio: λ = (AB)/(A + B). Simultaneous measurements of A and B on the same setup are suggested to be carried out using ultracold neutrons stored in the magnetic field of a superconducting solenoid. The proposed method for determining λ, firstly, makes it possible to neglect the contribution of the Firtz interference term, and, secondly, eliminates the need for accurate measurement of the neutron polarization. The presented method allows us to measure the λ value with a precision of 10–4.

作者简介

A. Serebrov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

编辑信件的主要联系方式.
Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

O. Zherebtsov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

G. Klyushnikov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

A. Koptyukhov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

A. Moroz

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

A. Murashkin

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

A. Fomin

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

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版权所有 © А.П. Серебров, О.М. Жеребцов, Г.Н. Клюшников, А.О. Коптюхов, А.Р. Мороз, А.Н. Мурашкин, А.К. Фомин, 2023

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