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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| Institution: | 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,m
c
=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 |V
cd
|=0.232
–0.020
+0.018
is also presented. |
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| Keywords: | |
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