Low Energy Tests of the Standard Model from β-Decay and Muon Capture
نویسندگان
چکیده
Two recent low energy precision experiments are considered, in order to illustrate how limits set by these measurements for couplings beyond the Standard Model are complementary to high energy constraints. UCL-IPN-97-P03 hep-ph/9711496 November 1997 1 Contribution to the Proceedings of The International Europhysics Conference on High-Energy Physics, 19–26 August 1997, Jerusalem, Israel 702: Low Energy Tests of the Standard Model from β-Decay and Muon Capture Jan Govaerts ([email protected]) Institute of Nuclear Physics Catholic University of Louvain 2, Chemin du Cyclotron B-1348 Louvain-la-Neuve
منابع مشابه
Symmetry Tests within the Standard Model and Beyond from Nuclear Muon Capture
Precision measurements in nuclear muon capture on the proton and He allow for tests of the Standard Model for the strong and electroweak interactions, complementary to those achieved in high energy experiments. The present situation and future prospects are reviewed, emphasizing where renewed efforts could prove to be rewarding in exploring ever further beyond the confines of the Standard Model...
متن کاملIs the Unitarity of the quark-mixing-CKM-matrix violated in neutron β-decay?
This article is about the interplay between the Standard Model of elementary particle physics and neutron β-decay. Since the Fermi decay constant is known from muon decay, the Standard Model describes neutron β-decay with only two additional parameters. One parameter is the first entry |Vud| of the CKMmatrix. The other one is λ, the ratio of the vector coupling constant and the axial vector con...
متن کاملOn the unusual properties of the 282 keV state in 135 Sb
Recently the first excited state in Sb has been observed at the unexpectedly low excitation energy of only 282 keV and interpreted as mainly d5/2 proton coupled to the Sn core. Based on theoretical considerations it was suggested that its low excitation energy is related to a relative shift of the proton d5/2 and g7/2 orbits induced by the neutron excess. We have measured the lifetime of the 28...
متن کاملMagnet Design for the Target System of a Muon Collider/Neutrino Factory
The Target System and Pion Decay Channel for a Muon Collider/Neutrino Factory utilizes a string of solenoid magnets to capture and transport the low-energy pions whose decay provides the desired muon beams. The magnetic field strength at the target is 15-20 T, “tapering” down to 1.5-3 T in the Decay Channel. The superconducting coils which produce these fields must have substantial inner radius...
متن کاملar X iv : h ep - p h / 00 02 28 9 v 1 2 8 Fe b 20 00 Right - Handed Vector V and Axial A Couplings in Weak Interactions Wies law
In this paper a scenario admitting the participation of the right-handed vector VR and axial AR couplings with the conservation of the left-handed standard (V, A)L couplings is considered. The research is based on the muon capture by proton. We consider muon capture at the level of the Fermi theory, whose hamiltonian describes the four-fermion point (contact) interaction. Neutrinos are assumed ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997