Exact relativistic β decay endpoint spectrum
نویسندگان
چکیده
S. S. Masood,1,* S. Nasri,2,† J. Schechter,3,‡ M. A. Tórtola,4,§ J. W. F. Valle,5,‖ and C. Weinheimer6,¶ 1Department of Physics, 2700 Bay Area Boulevard, University of Houston Clear Lake, Houston, Texas 77058, USA 2Institute for Fundamental Theory, University of Florida, Gainesville, Florida, USA 3Department of Physics, Syracuse University, Syracuse, New York 13244-1130, USA 4Departamento de Fı́sica and CFTP, Instituto Superior Técnico, Avenida Rovisco Pais 1, P-1049-001 Lisboa, Portugal 5AHEP Group, Institut de Fı́sica Corpuscular–C.S.I.C./Universitat de València, Edificio Institutos de Paterna, Apartado 22085, E-46071 Valencia, Spain 6Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 9, D-48149 Münster, Germany (Received 13 June 2007; published 5 October 2007)
منابع مشابه
The Use of Nuclear β-decay as a Test of Bulk Neutrinos in Extra Dimensions
Theories which include neutrinos in large extra dimensions can be constrained by nuclear beta decay experiments. We examine universality of β decay strengths of Fermi transitions. From this we find that the extra dimensional Yukawa coupling for a higher dimensional scale of 10 TeV, and two extra dimensions can be constrained to y < ∼ 1. Kinematic implications are also discussed. In particular, ...
متن کاملNon-Relativistic Limit of Neutron Beta-Decay Cross-Section in the Presence of Strong Magnetic Field
One of the most important reactions of the URCA that lead to the cooling of a neutron star, is neutron beta-decay ( ). In this research, the energy spectra and wave functions of massive fermions taking into account the Anomalous Magnetic Moment (AMM) in the presence of a strong changed magnetic field are calculated. For this purpose, the Dirac-Pauli equation for charged and neutral fermions is ...
متن کاملIsotopes for fundamental research in 83Kr for KATRIN
6 Contents Introduction The advantage of radioisotopic standards compared to other physical standards is the independence of their properties from outer conditions. They are neither sensitive to temperature change nor to progress of time. They serve as influence-free-etalon. That is why their use is advantageous in fundamental research, where high precision is required. For instance in direct n...
متن کاملNuclear-atomic state degeneracy in neutrinoless double-electron capture: A unique test for a Majorana-neutrino
There is a general consensus that detection of a double-beta decay without any neutrino involved would mark physics beyond the Standard Model. This is because in such decay modes lepton number conservation would be violated and the neutrino would reveal itself as being its own antiparticle. It is this particle-antiparticle duality which makes the neutrino of Majorana type. So far, the experimen...
متن کاملThe KATRIN sensitivity to the neutrino mass and to right-handed currents in beta decay
The aim of the KArlsruhe TRItium Neutrino experiment KATRIN is the determination of the absolute neutrino mass scale down to 0.2 eV, with essentially smaller model dependence than from cosmology and neutrinoless double beta decay. For this purpose, the integral electron energy spectrum is measured close to the endpoint of molecular tritium beta decay. The endpoint, together with the neutrino ma...
متن کامل