CERN Accelerating science

CMS Note
Report number	CMS-CR-2010-011
Title	Measurement of The Muon Stopping Power in Lead Tungstate
Author(s)	Benaglia, Andrea Davide (Milan Bicocca U. ; INFN, Milan Bicocca)
Publication	2010
Collaboration	CMS Collaboration
Imprint	14 Jan 2010
Number of pages	11
Presented at	95th Congresso Nazionale Societa Italiana di Fisica FISICA, Bari, Italy, 28 Sep - 3 Oct 2009
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Keywords	ECAL
Abstract	During October-November 2008 the CMS Collaboration conducted a data-taking exercise in order to complete the commissioning of the experiment for extended operation. A large sample of cosmic ray triggered events has been recorded with the solenoid at its nominal axial field strength of 3.8 T. The events collected have been exploited to perform a measurement of specific energy loss of muons in lead tungstate - the electromagnetic calorimeter material - over a wide momentum range (from 5 GeV/c to 1 TeV/c). The results are consistent with the expectations over the entire range. A comparison of collision losses with radiative losses allowed for a first experimental determination of muon critical energy in lead tungstate, measured to be 160^{+5}_{-6}pm8 GeV, in agreement with expectations.
Copyright/License	Preprint: (License: CC-BY-4.0)