Recent content by kenith

could you give a qualitative description? I'm more interested in the physical ideas instead of being bogged down in QED i guess all i would like is a definition. and also an answer to whether my definition is correct at all. also, i don't know whether what I'm saying is right, since i don't...

Ok, so what I've been trying to do in the post is to ask for an explanation in baby terms what all these big words means. the paper throws around terms like infrared and collinear safety like they are talking to someone working at CDF. well... i don't what these terms mean at all. reference me...

i say it so someone can say I'm wrong and why!

i am an undergraduate, and yes i read the reference. lets specifically talk about infrared and collinear problems that arise in jet algorithms since that is what the paper talks about. infrared instability comes from the fact that addition of soft radiation can change the cone configuration...

what are infrared and collinear singularities?

how do infrared and collinear safety play into theoretical predictions? Why these not preferred when comparing data to theory?

on page three: What exactly are infrared singularities, and why do they not appear in perturbative calculations? Figure one in that paper illustrates infrared sensitivity. Presence of soft radiation leads to then merging of the jets. What is this not preferred? Any would do theorists not...

Hi guys, I have some general questions and was hoping some of you might be able to answer them. Does anyone know what it means to be "collinear unsafe" and "infrared unstable" when referring to energy reconstruction in calorimeters? Also why do theorist prefer collinear and infrared safe data...