Muon Fine Alignment Study page

These pages contain the link to current activities

LHCb Twiki Page

Useful documents

• [[][First Presentation]]
• [[][Second Presentation]]

My current understanding

• Hit block. Made with hits retrieved using muon rec tool from MuonMonKernel (MuonMonitor hinerits from MuonMonAlg, that knows about MuonMonRec). The hits retrieved with m_recTool->hits() are built from the raw banks by creating a MuonMonHit from a tile. The tile is associated to the raw bank got from a given ode trough a matrix filled in the Muon reconstruction.
• Pad block. Made out the coords obtained with rec tools. This is the same input as the Trk block. The units are different, (*10 in Pads, Hits) but they are exactly the same!
• Trk block. The hits are taken directly from the tracks using the m_cosmicsTool from MuonCosmicRec (Muon/Cosmics). trackHits() returns the hits built from all the coords of each event. The tile is extracted from the coord and the MuonHit is created. Muon Hit has an index that can be used in a subsequent match with the hits used to build a track.

There is the need to compare MuonHit and MuonMonHit, but they are built in a completely different way and are giving different information.

-- AlessioSarti - 16 Sep 2008