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Neutrino dimuon production and the strangeness asymmetry of the nucleon

  • experimental physics
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Abstract.

We have performed the first global QCD analysis to include the CCFR and NuTeV dimuon data, which provide direct constraints on the strange and antistrange parton distributions, s(x) and \(\bar{s}(x)\). To explore the strangeness sector, we adopt a general parametrization of the non-perturbative \(s(x), \bar{s}(x)\) functions satisfying basic QCD requirements. We find that the strangeness asymmetry, as represented by the momentum integral \([S^{-}]\equiv \int_0^1 x [s(x)-\bar{s}(x)] \mathrm dx\), is sensitive to the dimuon data provided the theoretical QCD constraints are enforced. We use the Lagrange multiplier method to probe the quality of the global fit as a function of [S -] and find -0.001 < [S -] < 0.004. Representative parton distribution sets spanning this range are given. Comparisons with previous work are made.

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Authors and Affiliations

  1. Department of Physics, Southern Methodist University, TX 75275, Dallas, USA

    F. Olness & P. Nadolsky

  2. Department of Physics and Astronomy, Michigan State University, MI 48824, E. Lansing, USA

    J. Pumplin, D. Stump, J. Huston & W. K. Tung

  3. Taipei Municipal Teachers College, Taiwan

    H. L. Lai

  4. Brookhaven National Laboratory, Physics Department and RIKEN-BNL Research Center, NY 11973, Upton, USA

    S. Kretzer

  5. Department of Physics, Florida State University, FL 32306, Tallahassee, USA

    J. F. Owens

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  1. F. Olness
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  2. J. Pumplin
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Additional information

Received: 15 January 2004, Revised: 23 November 2004, Published online: 15 February 2005

PACS:

11.30.Hv, 12.15.-y, 13.15. + g, 12.38.-t, 13.60.Hb

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Olness, F., Pumplin, J., Stump, D. et al. Neutrino dimuon production and the strangeness asymmetry of the nucleon. Eur. Phys. J. C 40, 145–156 (2005). https://doi.org/10.1140/epjc/s2004-02099-4

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