CalcHEP

Some features don't work on ubuntu, like "jet" definition

Asked by Ali Rajabi

I have installed calchep on my ubuntu machine. there are some differences between the one I use on my system and the tutorial. One of the main issues I have is that when I enter a process and define 5 light quarks plus gluon as jet, and I try to set a cut or distribution, for example the transverse momentum of the "jet" be in some range, or even when I want to define it as a distribution to plot it finally, I keep getting an error that "jet" is not defined. It is explicitly mentioned on the help page.

The problem is that it needs the cuts set according to the sub-process, not doing it for the general case. What I like to do is to apply the cut, and set the distributions, and in the command prompt run ../bin/subproc_cycle 0 0 so it runs over all sub-processes and I can plot the summed distribution finally.

There is an issue on running ../bin/subproc_cycle 0 0, which is I have to run the integration on the first two sub-processes at least so the command would work.

I appreciate any help you can offer.

Thanks,
A.R.

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Neil Christensen (neil-christensen-qft) said : 		#1

Dear Ali,

What version of CH are you using? What exactly do you type in the "Alias" table? What do you type in the cuts or distribution table?

Best,
Neil

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Ali Rajabi (arajabi) said : 		#2

Dear Neil,

 Thank you so much for your prompt response.
Well I am using the latest version (3.4). I think my mistake was that I didn't type anything in the Alias table, but after you mentioned, I defined jet in the Alias table and it worked.
I type :

Parameter Min value Max Value
T(Jet) 5 15

on the distribution table and it used to give me error, which is resolved now.

By the way, do you have any suggestion for the second issue I have, running subproc_cycle from the bash without running a few subprocess by hand?

Regards,
Ali

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Ali Rajabi (arajabi) said : 		#4

Dear Neil,

I ran into another problem. It doesn't store the statistics from previous subprocess, and it says that because some parameters are changed, the previous distributions are forgotten. Is there a way to solve this?

Regards,
Ali

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Neil Christensen (neil-christensen-qft) said : 		#5

It sounds like you might like the batch interface. See Section 7 of:

http://inspirehep.net/record/1123804

Cheers,
Neil

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Alexander Pukhov (pukhov) said : 		#6

"distributions are forgotten"
Indeed they are saved in file distr_# .
There are tools show_distr and sum_distr. See CalcHEP/bin/README for details.
Other way is to use batch, as Neil has proposed

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