FTxV Generic Fitter Vertex bank. One for each fitted vertex ============================================================== Contact: D. L. Wark, Oxford. Revision History:- ================ 2.07 N. West First version. Derived from part of the FT bank. 3.02 C. Jillings Add correlations. 5.02 N. West Fix up documentation: No FT*V now have extensions to FTXV. Description ----------- One bank generated for each fitted event vertex by the relevant fitter. Each type of fitter produces its own type of FTxV bank, for example, the quad fitter produces an FTQV bank. The first part of the vertex bank for all fitters is the same, and it is this common part that is described here. If a fitter produces further words an entry will appear in this list:- Reference Links --------------- None. Structural Links ---------------- -1 -KFTXV_FTXT FTxT Link to first track (if fit produces track information) Status Bits ----------- Note: Any status bit parameters are defined to work with bit functions such as IAND and BTEST. Data Words ---------- Data types: B(bit), I, F, D(double), H(hollerith 4 char) +1 F KFTXV_X Fitted X. +2 F KFTXV_Y Fitted Y. +3 F KFTXV_Z Fitted Z. +4 F KFTXV_T Fitted time. Only the above words are common to all fitters. However, most fitters will provide error estimates on these fitted quantities. Unless correlations are being taken into account, it is recommended that fitters follow this format:- +5 F KFTXV_DX Error on fitted X. +6 F KFTXV_DY Error on fitted Y. +7 F KFTXV_DZ Error on fitted Z. +8 F KFTXV_DT Error on fitted T. If correlations are also supplied it is recommended that fitters follow this format:- +9 F KFTXV_C11 +10 F KFTXV_C12 +11 F KFTXV_C13 +12 F KFTXV_C14 +13 F KFTXV_C22 +14 F KFTXV_C23 +15 F KFTXV_C24 +16 F KFTXV_C33 +17 F KFTXV_C34 +18 F KFTXV_C44 Notes ----- 1) All fitters produce an FTx and at least one FTxV. If the fitter can fit multiple vertices, then FTxV will be a chain. If track information is produced at any vertex, it will be recorded in an FTxT supported from the FTxV.