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Title: The D0 experiment's integrated luminosity for Tevatron Run IIa

Abstract

An essential ingredient in all cross section measurements is the luminosity used to normalize the data sample. In this note, we present the final assessment of the integrated luminosity recorded by the D0 experiment during Tevatron Run IIa. The luminosity measurement is derived from hit rates from the products of inelastic proton-antiproton collisions registered in two arrays of scintillation counters called the luminosity monitor (LM) detectors. Measured LM rates are converted to absolute luminosity using a normalization procedure that is based on previously measured inelastic cross sections and the geometric acceptance and efficiency of the LM detectors for registering inelastic events. During Run IIa, the LM detector performance was improved by a sequence of upgrades to the electronic readout system and other factors summarized in this note. The effects of these changes on the reported luminosity were tracked carefully during the run. Due to the changes, we partition the run into periods for which different conversions from measured LM rates to absolute luminosity apply. The primary upgrade to the readout system late in Run IIa facilitated a reevaluation of the overall normalization of the luminosity measurement for the full data sample. In this note, we first review the luminosity measurementmore » technique employed by D0. We then summarize the changes to the LM system during Run IIa and the corresponding normalization adjustments. The effect of the adjustments is to increase D0's assessment of its recorded integrated luminosity compared to what was initially reported during Run IIa. The overall increase is 13.4% for data collected between April 20, 2002 (the beginning of Run IIa data used for physics analysis) and February 22, 2006 (the end of Run IIa).« less

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
907791
Report Number(s):
FERMILAB-TM-2365
TRN: US0703373
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS, 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; EFFICIENCY; FERMILAB TEVATRON; LUMINOSITY; MONITORS; PERFORMANCE; PHYSICS; READOUT SYSTEMS; SCINTILLATION COUNTERS; Accelerators, Experiment-HEP

Citation Formats

Andeen, T., Casey, B.C.K., DeVaughan, K., Enari, Y., Gallas, E., Krop, D., Partridge, R., Schellman, H., Snow, G.R., Yacoob, S., Yoo, H.D., and /Brown U. /Fermilab /Indiana U. /Northwestern U. /Nebraska U. The D0 experiment's integrated luminosity for Tevatron Run IIa. United States: N. p., 2007. Web. doi:10.2172/907791.
Andeen, T., Casey, B.C.K., DeVaughan, K., Enari, Y., Gallas, E., Krop, D., Partridge, R., Schellman, H., Snow, G.R., Yacoob, S., Yoo, H.D., & /Brown U. /Fermilab /Indiana U. /Northwestern U. /Nebraska U. The D0 experiment's integrated luminosity for Tevatron Run IIa. United States. doi:10.2172/907791.
Andeen, T., Casey, B.C.K., DeVaughan, K., Enari, Y., Gallas, E., Krop, D., Partridge, R., Schellman, H., Snow, G.R., Yacoob, S., Yoo, H.D., and /Brown U. /Fermilab /Indiana U. /Northwestern U. /Nebraska U. Sun . "The D0 experiment's integrated luminosity for Tevatron Run IIa". United States. doi:10.2172/907791. https://www.osti.gov/servlets/purl/907791.
@article{osti_907791,
title = {The D0 experiment's integrated luminosity for Tevatron Run IIa},
author = {Andeen, T. and Casey, B.C.K. and DeVaughan, K. and Enari, Y. and Gallas, E. and Krop, D. and Partridge, R. and Schellman, H. and Snow, G.R. and Yacoob, S. and Yoo, H.D. and /Brown U. /Fermilab /Indiana U. /Northwestern U. /Nebraska U.},
abstractNote = {An essential ingredient in all cross section measurements is the luminosity used to normalize the data sample. In this note, we present the final assessment of the integrated luminosity recorded by the D0 experiment during Tevatron Run IIa. The luminosity measurement is derived from hit rates from the products of inelastic proton-antiproton collisions registered in two arrays of scintillation counters called the luminosity monitor (LM) detectors. Measured LM rates are converted to absolute luminosity using a normalization procedure that is based on previously measured inelastic cross sections and the geometric acceptance and efficiency of the LM detectors for registering inelastic events. During Run IIa, the LM detector performance was improved by a sequence of upgrades to the electronic readout system and other factors summarized in this note. The effects of these changes on the reported luminosity were tracked carefully during the run. Due to the changes, we partition the run into periods for which different conversions from measured LM rates to absolute luminosity apply. The primary upgrade to the readout system late in Run IIa facilitated a reevaluation of the overall normalization of the luminosity measurement for the full data sample. In this note, we first review the luminosity measurement technique employed by D0. We then summarize the changes to the LM system during Run IIa and the corresponding normalization adjustments. The effect of the adjustments is to increase D0's assessment of its recorded integrated luminosity compared to what was initially reported during Run IIa. The overall increase is 13.4% for data collected between April 20, 2002 (the beginning of Run IIa data used for physics analysis) and February 22, 2006 (the end of Run IIa).},
doi = {10.2172/907791},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}

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