Register to reply

Questions about weak force +bosons

by dangerbird
Tags: bosons, force, weak
Share this thread:
Mar7-09, 04:52 AM
P: 38
i cant seem to find any straightforward descriptions of it for why+when its needed. Plus im really confused as to how they weighed the bosons if they only exist for less than a nanosecond. im more interested in finding out how scientists figured out the bosons weight than anything
Phys.Org News Partner Physics news on
Refocusing research into high-temperature superconductors
Neutron tomography technique reveals phase fractions of crystalline materials in 3-dimensions
Tiny magnets, huge fields: Nanoscale ferromagnetic electrodes create chemical equivalent of solid-state spin valve
Mar7-09, 05:29 AM
Sci Advisor
HW Helper
malawi_glenn's Avatar
P: 4,739
ok, you mean why there is need of gauge bosons?

The simplest answer is first that the bosons are VIRTUAL, they are a mathematical tool/term which shows up when you calculate the interaction by means of perturbation theory. They are virtual particles since they do not fulfil E^2 = p^2 + m^2. So as an example the W boson which 'is responsible' for beta decay, is not there, it exists in calculations. The description why they are needed can not be straightforward presented since it is graduate level physics.

Now all gauge bosons have physical counterparts, real observable particles. e.g in top-quark decay, it decays into a botton quark and a W boson. Those particles are real, they are 'on shell' i.e they fulfill E^2 = p^2 + m^2.

But the W-boson is unstable, and decays into several things, and it is those things which are caught in the detector. One does not find the mass of particles by putting them on a weight-scale, one reconstruct/calculates the mass by looking at the four-momentum vectors of the detected particles.

Register to reply

Related Discussions
The speed of light, gravity, strong force, weak force Quantum Physics 9
Is the weak and strong force the same force? High Energy, Nuclear, Particle Physics 1
Weak force Quantum Physics 2
Properties of force mediating bosons General Physics 0
Question: Electromagnetism, Weak-force, Gravity, Strong Nuclear force ? General Physics 11