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Title: Estimation of combinatoric background in seaquest using an event-mixing method

Journal Article · · Journal of Instrumentation
 [1];  [1]; ORCiD logo [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7];  [3];  [8];  [5];  [3];  [9]
  1. New Mexico State University, Las Cruces, NM (United States)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. University of Michigan, Ann Arbor, MI (United States)
  4. Rutgers University, Piscataway, NJ (United States); Mississippi State University, Mississippi State, MS (United States)
  5. Argonne National Laboratory (ANL), Argonne, IL (United States)
  6. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Abilene Christian University, TX (United States)
  7. University of Colorado, Boulder, CO (United States)
  8. University of Virginia, Charlottesville, VA (United States); RIKEN Nishina Center for Accelerator-Based Science, Wako (Japan)
  9. Abilene Christian University, TX (United States)
+ Show Author Affiliations

All experiments observing dilepton pairs (e.g. e+e-, μ+μ-) must confront the existence of a combinatoricbackground caused by the combining of tracks not arising from the same physics vertex. Some method must be devised to calculate and remove this background. In this document we describe a particular event-mixing method relying on many of the unique aspects of the SeaQuest spectrometer and data. The method described here calculates the combinatoric background with correct normalization; i.e., there is no need to assign a floating normalization factor that is then determined in a subsequent fitting procedure. Numerous tests are applied to demonstrate the reliability of the method.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Contributing Organization:
SeaQuest
Grant/Contract Number:
AC02-07CH11359; FG02-94ER40847; AC02-06CH11357; FG02-07ER41528; FG02-96ER40950
OSTI ID:
1958495
Report Number(s):
FERMILAB-PUB--23-044-PPD; arXiv:2302.04152; oai:inspirehep.net:2630520
Journal Information:
Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 10 Vol. 18; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

References (3)

Investigation of background subtraction techniques for high mass dilepton physics
  • Crochet, P.; Braun-Munzinger, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 484, Issue 1-3 https://doi.org/10.1016/S0168-9002(01)02005-8
journal May 2002
The SeaQuest spectrometer at Fermilab
  • Aidala, C. A.; Arrington, J. R.; Ayuso, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 930 https://doi.org/10.1016/j.nima.2019.03.039
journal June 2019
Publisher Correction: The asymmetry of antimatter in the proton journal April 2022

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