Single hit efficiency of CMS Drift Tube chambers in 2015

The Drift Tube (DT) efficiency to detect a single hit was defined and measured as the ratio between the number of detected and expected hits.

The position of expected hits was determined using sets of well reconstructed track segments: at least 7 or at least 3 hits were required to be associated to a segment, in the Phi and Theta view respectively. Moreover the segment itself was required to cross the chamber with an inclination lower than 45 degrees.

The intersection of such a high quality track segment with a DT layer determined the position of the expected hit.

The DT was considered efficient if a hit was found within the tube where it was expected to be.

Such efficiency can be computed choosing different detector granularities.

We present results for Phi layer efficiency, Phi superlayer efficiency and chamber efficiency.

The plots show the efficiency distributions of the considered detector components.


Single hit efficiency in DT Phi layers


Single hit efficiency in DT Phi super layers


Single hit efficiency in DT chambers

-- FrancescaCavallo - 2015-12-14

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Topic revision: r1 - 2015-12-14 - FrancescaCavallo
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