Abstract
The procedure of setting the jet energy using events with direct photons proposed as one of the methods of jet calibration in the CMS is studied. Based on complete simulation of events in the CMS including the effects of pile-up of additional events for the initial beam luminosity of the accelerator (L = 2 × 1033 cm−2s−1), the rules for event selection during calibration are proposed. Errors of the proposed method due to the background and the radiation in the ISRare estimated.
Similar content being viewed by others
References
D. V. Bandourin, V. F. Konoplyanikov, and N. B. Skachkov, “γ + Jet” Events Rate Estimation for Gluon Distribution Determination at LHC,” Part. Nucl. Lett., No. 103, 34–43 (2000).
D. Bandurin, V. Konoplyanikov, and N. Skachkov, “On the Application of “γ + Jet” Events for Setting of Absolute Jet Energy Scale and Determining the Gluon Distribution at the LHC,” hep-ex/0207028.
D. V. Bandourin and N. B. Skachkov, “Separation of a Single Photon and Products of the π0, η, K 0s Meson Neutral Decay Channels in the CMS Electromagnetic Calorimeter Using Neural Network,” JHEP 0404.007 (2004).
V. F. Konoplyanikov, A. R. Urkinbaev, and O. L. Kodolova, “Study of the Background for the “γ + Jet” Process in the CMS Detector at Low Luminosity,” Pis’ma Fiz. Elem. Chastits At. Yadra 2, 73–83 (2005) [Phys. Part. Nucl. Lett. 2, 45 (2005)].
V. Konoplianikov, A. Ulyanov, and O. Kodolova, “Jet Calibration Using Gamma + Jet Events in the CMS Detector,” Eur. Phys. J. C 46, 37–43 (2006).
G. Sterman and S. Weinberg, “Jets from Quantum Chromodynamics,” Phys. Rev. Lett. 39, 1436–1447 (1977).
T. Sjostrand et al., “High-Energy Physics Event Generation with PYTHIA 6.1,” Comput. Phys. Commun. 135, 238–259 (2001).
M. Stavrianakou, “An Object-Oriented Simulation Program for CMS,” in Proc. of CHEP, Interlaken, Switzerland, 2004.
V. Innocente and D. Stickland, “The Design, Implementation, and Deployment of a Functional Prototype OO Reconstruction Software for CMS. The ORCA Project,” in Proc. of CHEP, Padova, Italy, 2000.
The Trigger and Data Acquisition Project. Vol. II: “Data Acquisition & High-Level Trigger,” CERN/LHCC 2002-026 (2002), p. 296.
The Trigger and Data Acquisition Project. Vol. I: “The Level-1 Trigger,” CERN/LHCC 2000-038 (2000), pp. 52–55.
Author information
Authors and Affiliations
Additional information
Original Russian Text © I.A. Golutvin, A.V. Zarubin, O.L. Kodolova, V.F. Konoplyanikov, A.L. Ul’yanov, S.V. Shmatov, 2008, published in Pis’ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, 2008, No. 5 (147), pp. 752–765.
Rights and permissions
About this article
Cite this article
Golutvin, I.A., Zarubin, A.V., Kodolova, O.L. et al. Setting the jet energy scale in the CMS calorimeter using events with direct photons. Phys. Part. Nuclei Lett. 5, 447–455 (2008). https://doi.org/10.1134/S1547477108050087
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1547477108050087