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Title: Measurement of the strange - antistrange asymmetry at NLO in QCD from NuTeV dimuon data

Abstract

A measurement of the asymmetry between the strange and antistrange quark distributions, from a next to leading order QCD analysis of dimuon events measured by the NuTeV experiment at Fermilab is presented. Neutrino charged current events with two muons in the final state provide a direct means for studying charm production and measuring the strange sea. NuTeV's sign selected beam allows independent measurement of the strange and antistrange seas. An improved measurement of the neutrino and antineutrino forward dimuon cross section tables, using the complete charged current event sample for normalization is performed. These tables are then analyzed at NLO to measure the strange and antistrange seas. Detector acceptance is modeled using an NLO charm cross section differential in all variables required. The strange quark distribution is found to have an integrated momentum weighted asymmetry of +0.00196 ± 0.00046(stat) ± 0.00045(syst) ± 0.00182(external). The charm mass is found to be 1.41 ± 0.10(stat) ± 0.08(syst) ± 0.12(external) GeV.

Authors:
 [1]
  1. Univ. of Oregon, Eugene, OR (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
879078
Report Number(s):
FERMILAB-THESIS-2006-01
TRN: US0701137
DOE Contract Number:
AC02-76CH03000
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTINEUTRINOS; ASYMMETRY; CHARGED CURRENTS; CROSS SECTIONS; DISTRIBUTION; FERMILAB; MUONS; NEUTRINOS; PRODUCTION; QUANTUM CHROMODYNAMICS; QUARKS; SEAS; Experiment-HEP

Citation Formats

Mason, David Alexander. Measurement of the strange - antistrange asymmetry at NLO in QCD from NuTeV dimuon data. United States: N. p., 2006. Web. doi:10.2172/879078.
Mason, David Alexander. Measurement of the strange - antistrange asymmetry at NLO in QCD from NuTeV dimuon data. United States. doi:10.2172/879078.
Mason, David Alexander. Wed . "Measurement of the strange - antistrange asymmetry at NLO in QCD from NuTeV dimuon data". United States. doi:10.2172/879078. https://www.osti.gov/servlets/purl/879078.
@article{osti_879078,
title = {Measurement of the strange - antistrange asymmetry at NLO in QCD from NuTeV dimuon data},
author = {Mason, David Alexander},
abstractNote = {A measurement of the asymmetry between the strange and antistrange quark distributions, from a next to leading order QCD analysis of dimuon events measured by the NuTeV experiment at Fermilab is presented. Neutrino charged current events with two muons in the final state provide a direct means for studying charm production and measuring the strange sea. NuTeV's sign selected beam allows independent measurement of the strange and antistrange seas. An improved measurement of the neutrino and antineutrino forward dimuon cross section tables, using the complete charged current event sample for normalization is performed. These tables are then analyzed at NLO to measure the strange and antistrange seas. Detector acceptance is modeled using an NLO charm cross section differential in all variables required. The strange quark distribution is found to have an integrated momentum weighted asymmetry of +0.00196 ± 0.00046(stat) ± 0.00045(syst) ± 0.00182(external). The charm mass is found to be 1.41 ± 0.10(stat) ± 0.08(syst) ± 0.12(external) GeV.},
doi = {10.2172/879078},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}

Thesis/Dissertation:
Other availability
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  • The authors present a new measurement of the difference between the nucleon strange and antistrange quark distributions from dimuon events recorded by the NuTeV experiment at Fermilab. This analysis is the first to use a complete next to leading order QCD description of charm production from neutrino scattering. Dimuon events in neutrino deep inelastic scattering allow direct and independent study of the strange and antistrange content of the nucleon. They find a positive strange asymmetry. They also report a new measurement of the charm mass.
  • The strange asymmetry measurement from NuTeV is discussed, followed by a brief look at measurement prospects from other current and future neutrino DIS experiments. The NuTeV measurement of the difference between the strange and antistrange quark distributions from dimuon events utilizes the first complete NLO QCD description of the process. Dimuon events, resulting from the semi-muonic decay of charmed particles produced in charged current neutrino interactions, allow direct study of the strange quark content of the nucleon. NuTeV's sign selected beam produced uniquely pure samples of neutrino and antineutrino initiated dimuon events, allowing independent measurement of the strange and antistrangemore » quark distributions.« less
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