2013:groups:tools:slha
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2013:groups:tools:slha [2013/06/18 16:01] benjamin.fuks created |
2013:groups:tools:slha [2014/04/16 09:42] (current) benjamin.fuks |
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| - | == 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, Alex A., Nazila, Wolfgang | ||
| + | |||
| + | 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 VERSION | ||
| + | </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 pb. | ||
| + | * **CODE**: a string representing the name of the program which has computed the cross section | ||
| + | * **VERSION**: a string, the version number of the proram employed | ||
2013/groups/tools/slha.1371564115.txt.gz · Last modified: 2013/06/18 16:01 by benjamin.fuks
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