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NuTeV Cross Section and Structure Function Measurements

D. Naples

TL;DR

The paper presents NuTeV's high-statistics neutrino and antineutrino deep-inelastic scattering measurements on iron using a sign-selected beam. It details cross-section extraction, flux determination via fixed ν0, and iterative MC-driven fitting to obtain ν and ν̄ cross sections with improved energy-scale systematics. From these cross sections, NuTeV derives F2(x,Q^2) and xF3(x,Q^2) by combining ν and ν̄ data, applying corrections and using NLO TRVFS and world RL inputs. Preliminary results show general agreement with CCFR at low x, but higher values at high x, and set the stage for QCD fits of non-singlet structure functions to constrain Λ_QCD.

Abstract

The NuTeV experiment has obtained a unique high statistics sample of neutrino and antineutrino interactions using its high-energy sign-selected beam. Charged-current neutrino and anti-neutrino differential cross sections are extracted. Neutrino-Iron structure functions, F_2(x,Q^2) and xF_3(x,Q^2), are determined by fitting the y-dependence of the differential cross sections. NuTeV has precise understanding of its hadron and muon energy scales, which improves the systematic precision of this measurement.

NuTeV Cross Section and Structure Function Measurements

TL;DR

The paper presents NuTeV's high-statistics neutrino and antineutrino deep-inelastic scattering measurements on iron using a sign-selected beam. It details cross-section extraction, flux determination via fixed ν0, and iterative MC-driven fitting to obtain ν and ν̄ cross sections with improved energy-scale systematics. From these cross sections, NuTeV derives F2(x,Q^2) and xF3(x,Q^2) by combining ν and ν̄ data, applying corrections and using NLO TRVFS and world RL inputs. Preliminary results show general agreement with CCFR at low x, but higher values at high x, and set the stage for QCD fits of non-singlet structure functions to constrain Λ_QCD.

Abstract

The NuTeV experiment has obtained a unique high statistics sample of neutrino and antineutrino interactions using its high-energy sign-selected beam. Charged-current neutrino and anti-neutrino differential cross sections are extracted. Neutrino-Iron structure functions, F_2(x,Q^2) and xF_3(x,Q^2), are determined by fitting the y-dependence of the differential cross sections. NuTeV has precise understanding of its hadron and muon energy scales, which improves the systematic precision of this measurement.

Paper Structure

This paper contains 4 sections, 3 equations, 2 figures.

Table of Contents

  1. Introduction
  2. Cross Section Measurement
  3. Structure Functions
  4. Conclusions

Figures (2)

  • Figure 1: Preliminary differential cross sections for neutrinos (left each side) and anti-neutrinos (right each side) at $E=85$ GeV. Points are NuTeV (filled circles) and CCFR (open squares). Curve shows fit to NuTeV data.
  • Figure 2: (Left) NuTeV's Preliminary Measurement of $F_2(x,Q^2)$ compared with previous $\nu$-Fe results from CCFR ukthesis. (Right) $xF_3(x,Q^2)$ extracted from the cross section difference and a comparison with the measurement from CCFR seligman. Curves show Thorne-Roberts NLO model trvfs.