CHE Instructions

NOTE: Explanations below are meant for the Ubuntu installation. Please contact me in case of questions! 

1) Location of basic code in protected area: Here
2) Instructions / example:

• All histograms are booked, filled and saved using HBOOK routines considering that the code is fully FORTRAN based.
• Makefile is in main directory.
• Booking of histograms is in: wpol_1.f
• Filling of histograms is in: wuser.f
• The only cuts that can be made within the program itself is on pT and eta (See wuser.f).
• Executable: wdfvo
• Syntax to run code: ./wdfvo < inw-example
  
• inw-example is a text file which defines all setting for executing the program. 
• Example of inw-example and explanation of paramters: 

---- START ----

'RUN1' ! Any string to identify a particle configuration

500 1 20d0 ! CME-Energy / Ratio of factorization scale to scale defined by user / Minimum pT

1 ! single-polarized This defines the type of cross-section output 0=unpol, 1=single pol, 2=double pol

-1 ! W- Here you define the charge of W boson 

1  1 ! pp Selected p for 1 and pbar for -1

69  ! DSSV This selects the polarized pdf function

46 ! MRST2002 This selects the unpolarized pdf

5 10  ! LO and NLO iterations 

1 1 ! new run

250000    1500000    

---- END ----

3) Note:

• CHE is not using separate grid files. It allows to use a pre-defined set of pdf's. 
• CHE can be used to run calculations for different CHE values.
• For the Ubuntu installation:
  • run.script: Example syntax file
  • che.sh: Example script to loop over different CME values