Physicists say that if a special kind of radioactive decay
called "neutrinoless double-beta decay
" is observed, it would prove two things - one, that in certain circumstances more matter is in fact created than antimatter; and two, neutrinos (which are virtually massless particles produced during radioactive decay
) can behave as their own antiparticles.
The main objective of this proposal is the study of rare flavour changing neutral current transitions in b-hadrons, where a b-quark decays
to an s- or d-quark and a pair of muons.
89 nm fluence fixed), varying the length of time we observe neutron decays
, ramping the magnetic field to remove marginally trapped neutrons, and numerous tests of the electronics and data acquisition systems (DAQ).
Radioactive beryllium-7 atoms locked inside molecular cages decay
extraordinarily quickly, Japanese researchers have found.
When a quantity decreases by a fixed fraction--here 1/2--it's known as exponential decay
Fungi associated with principal decays
in wood products in the United States.
, CKM unitarity (assumes conserved vector current, CKM unitarity, and values of |[V.
The collaborators came up with values for nine quantities, most of which are related to particle decays
and energy states of a variety of mesons and baryons.
cs] from W Decays
, in Workshop Proceedings of Quark-Mixing, CKM-Unitarity, Heidelberg, September 19-20, 2002, Mattes-Verlag, Heidelberg (2003), arXiv:hep-ph/0312124.
In the studies of such decays
at Brookhaven since the late 1980s, physicists there created kaon beams and observed the particles' fates using house-size detectors.
An electrostatic cylinder with a potential of 25 kV defines the detected region of neutron decays
For decades, textbooks have listed bismuth-209 as the heaviest naturally occurring atom that never decays
Because free neutron decay
is unencumbered by the many-nucleon effects present in all other nuclear decays
, measurements of the parameters that describe neutron decay
can be related to the fundamental weak couplings in a straightforward fashion.
When a neutron decays
in an unstable nucleus, the particle transforms into a proton, while an electron and an antineutrino flee the scene.
4/[square root of n], where n is the number of decays