2017:groups:tools:susylha
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
2017:groups:tools:susylha [2017/06/22 14:52] olivier.mattelaer [The details] |
2017:groups:tools:susylha [2017/06/22 18:20] olivier.mattelaer [The details] |
||
|---|---|---|---|
| Line 21: | Line 21: | ||
| This general information line is then followed by the cross section themselves, given as a series of line under the form | This general information line is then followed by the cross section themselves, given as a series of line under the form | ||
| <code> | <code> | ||
| - | SCALE_SCHEME QCD_ORDER EW_ORDER KAPPA_F KAPPA_R PDF_ID VALUE CODE VERSION | + | SCALE_SCHEME QCD_ORDER EW_ORDER KAPPA_F KAPPA_R PDF_ID1 PDF_ID2 VALUE VALUEUP VALUEDOWN DUMMY |
| </code> | </code> | ||
| where | where | ||
| Line 27: | Line 27: | ||
| * 0: the central scale is the average mass of the produced particles | * 0: the central scale is the average mass of the produced particles | ||
| * 1: fixed scales | * 1: fixed scales | ||
| - | * 2: the scale is set to the partonic center-of-mass energy | + | * 2: the scale is set to the invariant mass of the final state particles at the LO |
| - | * 3: the scale is set to the transverse mass of the final state particles | + | * 3: the scale is set to the transverse mass of the final state particles at the LO |
| + | * 4: some other definition to be described as a comment | ||
| * **QCD_ORDER**: an integer number, which contains information on the order in alpha_s included in the computation. This is codified as | * **QCD_ORDER**: an integer number, which contains information on the order in alpha_s included in the computation. This is codified as | ||
| * 0: Born cross section | * 0: Born cross section | ||
| Line 38: | Line 39: | ||
| * **PDF_ID**: the lhapdf code of the employed parton densities | * **PDF_ID**: the lhapdf code of the employed parton densities | ||
| * **VALUE**: a floating point number, representing the value of the cross section in pb. | * **VALUE**: a floating point number, representing the value of the cross section in pb. | ||
| - | * **CODE**: a string representing the name of the program which has computed the cross section | + | * **DUMMY**: integer number to tag possible different options to be described in the comments |
| - | * **VERSION**: a string, the version number of the proram employed | + | * CODE: as a COMMENT string representing the name of the program which has computed the cross section |
| - | + | * VERSION: as a COMMENT string, the version number of the proram employed | |
| - | Olivier Questions: | + | * REFERENCE: Citation |
| - | 1) Do we really want to have 1 line for each PDF replica? Would not be better to quote the theoretical uncertainty in % ? | + | * FIX the meaning of DEFAULT values... |
| - | 2) What about non LHC collision (fix target/ DIS/...)? This requires 2 PDF id. | + | |
| - | 3) other scheme are often used like HT/2 and (CKKW ones) are not even analytic. | + | Stefan comments: |
| - | 4) What about NNLO or NNLL? | + | - PREFERRED OPTION: In order to deal with resummation I suggest to add a second digit to QCD_ORDER, i.e. 0=LO, 1=NLO, 2=NNLO, etc. 11=NLO+NLL, 21=NNLO+NLL, 22=NNLO+NNLL, etc.. Only LO+LL=00 is then not well defined. And this approach is not specific to what is actually resummed (p_T, threshold,...). TYPE of resummation as a COMMENT. |
| - | 5) using some xml tag in a non xml like file is weird (or I do not understand where you plan to write such information). | + | - |
| - | 6) Missing the information of the statistical uncertainty | + | - OPTIONAL: For EW corrections it would be helpful to somehow encode if full factorization is assumed or not. => Implement as a comment what scheme is used to combine QCD and EW corrections. |
| + | - | ||
| + | - Some codes also give a scale uncertainty in the same run. Can this be added? | ||
2017/groups/tools/susylha.txt · Last modified: 2017/06/22 22:22 by fabio.maltoni
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
