Determination of the strange quark content of the nucleon from a next-to-leading-order QCD analysis of neutrino charm production |
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| Authors: | A. O. Bazarko C. G. Arroyo K. T. Bachmann T. Bolton C. Foudas B. J. King W. C. Lefmann W. C. Leung S. R. Mishra E. Oltman P. Z. Quintas S. A. Rabinowitz F. J. Sciulli W. G. Seligman M. H. Shaevitz F. S. Merritt M. J. Oreglia B. A. Schumm R. H. Bernstein F. Borcherding H. E. Fisk M. J. Lamm W. Marsh K. W. B. Merritt H. M. Schellman D. D. Yovanovitch A. Bodek H. S. Budd P. de Barbaro W. K. Sakumoto T. Kinnel P. H. Sandler W. H. Smith |
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| Affiliation: | A. O. Bazarko, C. G. Arroyo, K. T. Bachmann, T. Bolton, C. Foudas, B. J. King, W. C. Lefmann, W. C. Leung, S. R. Mishra and E. Oltman, et al. |
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| Abstract: | We present the first next-to-leading-order QCD analysis of neutrino charm production, using a sample of 6090  – and -induced opposite-sign dimuon events observed in the CCFR detector at the Fermilab Tevatron. We find that the nucleon strange quark content is suppressed with respect to the non-strange sea quarks by a factor  =0.477–0.053+0.063, where the error includes statistical, systematic and QCD scale uncertainties. In contrast to previous leading order analyses, we find that the strange seax-dependence is similar to that of the non-strange sea, and that the measured charm quark mass,mc=1.70±0.19 GeV/c2, is larger and consistent with that determined in other processes. Further analysis finds that the difference inx-distributions betweenxs(x) and is small. A measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcd|=0.232–0.020+0.018 is also presented. |
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