2019 Impact factor 4.389
Particles and Fields


Eur. Phys. J. C 20, 487-495 (2001)
DOI: 10.1007/s100520100645

A precise measurement of 180 GeV muon energy losses in iron

The ATLAS TileCal Collaboration P. Amaral and et al.

LIP Lisbon and FCUL Univ. of Lisbon, Portugal

Abstract
The energy loss spectrum of 180 GeV muons has been measured with the 5.6 m long finely segmented Module 0 of the ATLAS hadron Tile Calorimeter at the CERN SPS. The differential probability ${\rm {d}}P/{\rm {d}}v$ per radiation length of a fractional energy loss $v = \Delta E_{\mu} / E_{\mu}$ has been measured in the range $ 0.025 \leq v \leq 0.97$; it is compared with theoretical predictions for energy losses due to bremsstrahlung, production of electron-positron pairs, and energetic knock-on electrons. The iron elastic form factor correction $\Delta_{Fe}^{el} = 1.63 \pm 0.17_{stat} \pm 0.23_{syst}
{\pm^{0.20}_{0.14}}_{theor}$ to muon bremsstrahlung in the region of no screening of the nucleus by atomic electrons has been measured for the first time, and is compared with different theoretical predictions.



© Società Italiana di Fisica, Springer-Verlag 2001