RE: Particle physics @ Utopian - Implementing an LHC analysis on a computer: the physics objects

[lemouth]

You mean implementing the (e,μ) and (j,l) checks only, right?

Argh! A typo in my post. I meant second column. Sorry about that. One needs to implement the e/j and j/l removals.

Finally what does the "/GeV" mean in Plt/GeV?
Does this mean the transversal momentum of the lepton expressed in GeV?

In particle physics, we use a very handy system of units in which the speed of light equals 1 and the Planck constant equals 1. This implies that everything can be expressed in GeV (energy, momentum, mass, etc...) or 1/GeV (length, time, etc...) or actually some powers of GeV.

Comments

[irelandscape]

Argh! A typo in my post. I meant second column. Sorry about that. One needs to implement the e/j and j/l removals.

Ah cool, that makes sense now.

In particle physics, we use a very handy system of units in which the speed of light equals 1 and the Planck constant equals 1. This implies that everything can be expressed in GeV (energy, momentum, mass, etc...) or 1/GeV (length, time, etc...) or actually some powers of GeV.

OK, but I'm still unsure how this affects the calculation in column 4.
I understand the Plt part but I'm not sure if the /GeV has any bearing.
Units are usually not explicitly indicated in formulas, right?
Or am I wrong and there is some kind of division to apply to Plt?

Thanks!

[lemouth]

This is actually a way to write the equation consistently from the dimension standpoint. The transverse momentum p_T has to be given in GeV, so that p_T/GeV is dimensionless. Note that MadAnalysis assumes every single p_T is given in GeV, so that you can in fact ignore the "/GeV" part.

[irelandscape]

Perfect. Thanks.

[mshakib]

Most welcome sir...

[bulet07]

Thanks sir

[bulet07]

Most welcome sir

[sujonmia]

Thanks