Sterile neutrino oscillations in MINOS and hadron production in pC collisions Page: 88 of 237
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4.3 The drift calibration
along the track has its pulse height corrected by the path-length correction factor. This is
to account for the difference in deposited pulse height whether the muon was crossing the
plane orthogonally or with an inclination.
Energy deposited per plane
The first and last planes hit in each track are removed from the considered hits. This
accounts for anomalous energy loss at the end of the track. The pulse height weighted
mean position < x >ph and < y >ph of all the hits i (xi, y) on the same plane with pulse
height Pi are evaluated as:
<X>h < Y>Ph (4.6)
A coarse fiducial volume cut is applied on the pulse height weighted mean position < x >ph
and < y >ph in each plane. In particular a radial distance from the centre of the coil is
<>ph < < y > (4.7)
In both detectors, the requirement on the pulse height weighted mean radial distance has
to be more than 30 cm away from the centre of the coil hole. At the Far Detector the
cluster has also to be within a 3.5 m radius circle centred in the coil. At the Near Detector
the cluster mean position has to be within a 1 m radius from the beam spot and in the first
120 planes of the detector (calorimeter). On each day, the information of the deposited
pulse height in each plane is recorded into a histogram. The median of the pulse height
per plane deposited by orthogonal crossing cosmic muons has been shown  to provide a
good indication of the detector response on a particular day. The error associated to this
quantity is evaluated as the error on the mean, i.e. the RMS of the distribution divided
by the square root of the number of plane entries. Technically this is not perfectly correct,
as the error on the median should differ from the error on the mean. As an analytical
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Tinti, Gemma Maria & U., /Oxford. Sterile neutrino oscillations in MINOS and hadron production in pC collisions, thesis or dissertation, July 1, 2010; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1015233/m1/88/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.