Abstract
Since jets are key ingredients for measurements at hadron colliders, the evaluation of their performance is particularly relevant for physics analyses. The two key quantities that are input to physics analyses are the jet energy and transverse momentum response and resolution. The jet energy response and resolution are respectively connected to the mean and the width of the distribution of the energies of a jet originating from an object whose true energy is within a given (narrow) range. Jet calibration techniques such as those described in Chap. 6 are designed to restore the jet energy scale and could help to reduce the fluctuation in the reconstructed jet energy.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
Most effects mentioned here lead to a Gaussian distribution of the jet response, but some contribute to its tails. As a first iteration, most techniques used to estimate the jet energy resolution are mainly directed towards the measurement of the Gaussian width of the jet response distribution.
- 2.
It can be shown that the fractional jet \(p_T\) resolution in Monte Carlo can be approximated by the Gaussian width of the \(p_T\) response distribution \(\mathcal R \) as in a given \((p_T^{true}, \eta )\) bin and dividing it by the mean response using the assumption of narrow \(p_T^{true}\) bins.
- 3.
A similar procedure can also be used to estimate the resolution of jets in different rapidity regions, if the resolution for one of the two rapidity regions is known.
- 4.
The photon response is defined as the ratio of the photon \(p_T\) measured in the calorimeter and the true photon \(p_T\).
- 5.
only available in MC comparison
References
ATLAS Collaboration, Jet energy measurement with the ATLAS detector in proton–proton collisions at \(\sqrt{(s)}\) = 7 TeV, arxiv:1112.6426 [hep-ex]
C. Doglioni, P. Francavilla, P. Loch, K. Perez, R. Vitillo, Design of the Jet Performance Software for the ATLAS Experiment at LHC ATL-SOFT-PROC-2011-037, CERN, Geneva, Feb 2011
https://twiki.cern.ch/twiki/bin/view/AtlasProtected/JetPerformance
ATLAS Collaboration, Jet energy resolution and selection efficiency relative to track jets from in-situ techniques with the ATLAS Detector Using Proton–Proton Collisions at a Center of Mass Energy \(\sqrt{s}\) = 7 TeV, ATL-COM-PHYS-2010-054, CERN, Geneva, July 2010
ATLAS Collaboration, Jet energy resolution from in-situ techniques with the ATLAS Detector Using Proton–Proton Collisions at a Center of Mass Energy \(\sqrt{s} = 7 \) TeV, ATL-COM-PHYS-2011-240, CERN, Geneva, March 2011
D\(\emptyset \) Collaboration, B. Abbott et al., High-\(p_T\) jets in \(p \bar{p}\) collisions at \(\sqrt{s} = 630\) GeV and 1,800 GeV. Phys. Rev. D 64, 032003 (2001) arxiv:hep-ex/0012046
UA2 Collaboration, P. Bagnaia et al., Measurement of production and properties of jets at the CERN anti-p p Collider. Z. Phys. C 20 117–134 (1983)
ATLAS Collaboration, Determination of the jet energy measurement uncertainty using photon-jet events in proton–proton collisions at \(\sqrt{s} = 7\) TeV, ATLAS-CONF-2011-031, CERN, Geneva, Feb 2011
ATLAS Collaboration, Probing the jet energy measurement at the TeV-scale using the multi-jet balance technique in proton–proton collisions at \(\sqrt{s} = 7 \) TeV, ATLAS-CONF-2011-029, CERN, Geneva, Feb 2011
ATLAS Collaboration, Determination of the ATLAS jet energy measurement uncertainties using tracks in proton–proton collisions at \(\sqrt{s} = 7\) TeV, ATLAS-CONF-2011-067, CERN, Geneva, May 2011
ATLAS Collaboration, In-situ pseudo-rapidity inter-calibration to evaluate jet energy scale uncertainty and calorimeter performance in the forward region, ATLAS-CONF-2010-055 CERN, Geneva, June 2010
ATLAS Collaboration, In-situ pseudorapidity intercalibration for evaluation of jet energy scale uncertainty using dijet events in proton-proton collisions at \(\sqrt{s}\) =7 TeV, ATLAS-CONF-2011-014 CERN, Geneva, February, 2011
P.Z. Skands, Tuning Monte Carlo generators: the perugia tunes. Phys. Rev. D 82, 074018 (2010), arXiv:1005.3457 [hep-ph]
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Doglioni, C. (2012). Jet Reconstruction Performance. In: Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30538-2_5
Download citation
DOI: https://doi.org/10.1007/978-3-642-30538-2_5
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-30537-5
Online ISBN: 978-3-642-30538-2
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)