Recent content by ncs22

Yes, well exactly the right idea anyway. It looks like you might have got your units a bit confused (or I might be misunderstanding you) 120cm is 1.2m not 0.12m :-)

awesome! thanks

From the way the question refers to the combined mass I am assuming that the bullet and the mass stick together after impact. In this case it is not possible to use conservation of kinetic energy before and after impact as some of the kinetic energy must be lost to heat or to deforming the...

Homework Statement There are some equations in the notes on field theory I am reading with notation I have never come across before. Someone told me it was a way of ensuring that the expression was anti-symmetric. I can't find it used the same anywhere else but no explanation is provided...

Thanks for the reply. ok cool at least that means the first bit is probably right :-) The phase space factor is the number of final states per initial energy, for example the term in Fermi's Golden rule usually denoted by a \rho. Yes I know you can write the phase space as a product of...

Show that the phase space factor \rho \propto p^2 dp/dE for the decay \pi\rightarrow \mu + \upsilon is \rho \propto \frac{({m_\pi}^2 - {m_\mu}^2)^2}{{m_\pi}^3}E_\mu where E is the total energy.I can show that p^2 = ({m_\pi}^2 - {m_\mu}^2)^2/4{m_\pi}^2 but then I get stuck, I don't know how...