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Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data.

- Eur Phys J C Part Fields (2014)

Bottom Line: The momentum resolution ranges from [Formula: see text] at central rapidity and for transverse momentum [Formula: see text] GeV, to [Formula: see text] at large rapidity and [Formula: see text] GeV.The momentum scale is known with an uncertainty of [Formula: see text] to [Formula: see text] depending on rapidity.A method for the recovery of final state radiation from the muons is also presented.

View Article: PubMed Central - PubMed

Affiliation: CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

ABSTRACT

This paper presents the performance of the ATLAS muon reconstruction during the LHC run with [Formula: see text] collisions at [Formula: see text]-8 TeV in 2011-2012, focusing mainly on data collected in 2012. Measurements of the reconstruction efficiency and of the momentum scale and resolution, based on large reference samples of [Formula: see text], [Formula: see text] and [Formula: see text] decays, are presented and compared to Monte Carlo simulations. Corrections to the simulation, to be used in physics analysis, are provided. Over most of the covered phase space (muon [Formula: see text] and [Formula: see text] GeV) the efficiency is above [Formula: see text] and is measured with per-mille precision. The momentum resolution ranges from [Formula: see text] at central rapidity and for transverse momentum [Formula: see text] GeV, to [Formula: see text] at large rapidity and [Formula: see text] GeV. The momentum scale is known with an uncertainty of [Formula: see text] to [Formula: see text] depending on rapidity. A method for the recovery of final state radiation from the muons is also presented.

No MeSH data available.


Related in: MedlinePlus

Dimuon invariant mass resolution for CB muons measured from ,  and  events as a function of the average transverse momentum in three  ranges. Both muons are required to be in the same  range. The  and  data are plotted as a function of  while for  data are plotted as a function of  as defined in Eq. (16). The error bars represent statistical and systematic errors added in quadrature. The lower panel shows the ratio between data and the corrected MC, with bands representing the uncertainty on the MC corrections for the three calibration samples
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Fig14: Dimuon invariant mass resolution for CB muons measured from , and events as a function of the average transverse momentum in three ranges. Both muons are required to be in the same range. The and data are plotted as a function of while for data are plotted as a function of as defined in Eq. (16). The error bars represent statistical and systematic errors added in quadrature. The lower panel shows the ratio between data and the corrected MC, with bands representing the uncertainty on the MC corrections for the three calibration samples

Mentions: At a given , the relative dimuon mass resolution depends approximately on (Eq. 15). This allows a direct comparison of the momentum resolution using different resonances. This is shown in Fig. 14, where the relative mass resolution from , and events is compared in three regions of . The and resolutions are in good agreement.Fig. 13


Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data.

- Eur Phys J C Part Fields (2014)

Dimuon invariant mass resolution for CB muons measured from ,  and  events as a function of the average transverse momentum in three  ranges. Both muons are required to be in the same  range. The  and  data are plotted as a function of  while for  data are plotted as a function of  as defined in Eq. (16). The error bars represent statistical and systematic errors added in quadrature. The lower panel shows the ratio between data and the corrected MC, with bands representing the uncertainty on the MC corrections for the three calibration samples
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4371046&req=5

Fig14: Dimuon invariant mass resolution for CB muons measured from , and events as a function of the average transverse momentum in three ranges. Both muons are required to be in the same range. The and data are plotted as a function of while for data are plotted as a function of as defined in Eq. (16). The error bars represent statistical and systematic errors added in quadrature. The lower panel shows the ratio between data and the corrected MC, with bands representing the uncertainty on the MC corrections for the three calibration samples
Mentions: At a given , the relative dimuon mass resolution depends approximately on (Eq. 15). This allows a direct comparison of the momentum resolution using different resonances. This is shown in Fig. 14, where the relative mass resolution from , and events is compared in three regions of . The and resolutions are in good agreement.Fig. 13

Bottom Line: The momentum resolution ranges from [Formula: see text] at central rapidity and for transverse momentum [Formula: see text] GeV, to [Formula: see text] at large rapidity and [Formula: see text] GeV.The momentum scale is known with an uncertainty of [Formula: see text] to [Formula: see text] depending on rapidity.A method for the recovery of final state radiation from the muons is also presented.

View Article: PubMed Central - PubMed

Affiliation: CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

ABSTRACT

This paper presents the performance of the ATLAS muon reconstruction during the LHC run with [Formula: see text] collisions at [Formula: see text]-8 TeV in 2011-2012, focusing mainly on data collected in 2012. Measurements of the reconstruction efficiency and of the momentum scale and resolution, based on large reference samples of [Formula: see text], [Formula: see text] and [Formula: see text] decays, are presented and compared to Monte Carlo simulations. Corrections to the simulation, to be used in physics analysis, are provided. Over most of the covered phase space (muon [Formula: see text] and [Formula: see text] GeV) the efficiency is above [Formula: see text] and is measured with per-mille precision. The momentum resolution ranges from [Formula: see text] at central rapidity and for transverse momentum [Formula: see text] GeV, to [Formula: see text] at large rapidity and [Formula: see text] GeV. The momentum scale is known with an uncertainty of [Formula: see text] to [Formula: see text] depending on rapidity. A method for the recovery of final state radiation from the muons is also presented.

No MeSH data available.


Related in: MedlinePlus