This shows you the differences between two versions of the page.
Next revision | Previous revision Next revision Both sides next revision | ||
2013:groups:tools:slha [2013/06/18 16:01] benjamin.fuks created |
2013:groups:tools:slha [2013/06/18 16:24] benjamin.fuks |
||
---|---|---|---|
Line 1: | Line 1: | ||
- | == Extending the SLHA: cross section information == | + | ====== Extending the SLHA: cross section information ====== |
+ | |||
+ | == Interested people (please add your name) == | ||
+ | Benjamin, Peter, Sezen, Filip, Ben, Pietro, Werner, ... | ||
+ | |||
+ | The plans is to add new blocks to a supersymmetric spectrum with information on production cross section of particles included in the spectrum of interest. We propose to add one new block for each process under consideration. | ||
+ | |||
+ | * The block starts with | ||
+ | <code> | ||
+ | XSECTION SQRTS PDG_CODE1 PDG_CODE2 NF PDG_CODE3 .... | ||
+ | </code> | ||
+ | where | ||
+ | * **SQRTS**: a floating number representing the center-of-mass energy, to be given in GeV. | ||
+ | * **PDG_CODE1** and **PDG_CODE2**: two integer numbers, representing the pdg codes of the initial state particles | ||
+ | * **NF**: an integer number, representing the number of final state particles | ||
+ | * **PDG_CODE3**, **PDG_CODE4**, ...: NF integer numbers, representing the pdg codes of the final state particles | ||
+ | |||
+ | This general information line is then followed by the cross section themselves, given as a series of line under the form | ||
+ | <code> | ||
+ | SCALE_SCHEME QCD_ORDER EW_ORDER KAPPA_F KAPPA_R PDF_ID VALUE | ||
+ | </code> | ||
+ | where | ||
+ | * **SCALE_SCHEME**: an integer number, related to the way the central scales are chosen. So far, the choices are | ||
+ | * 0: the central scale is the average mass of the produced particles | ||
+ | * 1: fixed scales | ||
+ | * 2: the scale is set to the partonic center-of-mass energy | ||
+ | * 3: the scale is set to the transverse mass of the final state particles | ||
+ | * **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 | ||
+ | * 1: NLO cross section | ||
+ | * 2: NLO+NLL cross section | ||
+ | * **EW_ORDER**: same as above but with respect to electroweak corrections | ||
+ | * ** KAPPA_F**: a floating point number, related to the variation of the factorization scale with respect to the central scale. For SCALE_SCHEME set to 1, the scale itself has to be provided. | ||
+ | * ** KAPPA_R**: same as above, for the renormalization scale | ||
+ | * **PDF_ID**: the lhapdf code of the employed parton densities | ||
+ | * **VALUE**: a floating point number, representing the value of the cross section in GeV. |