PRA–HEP/94–9 What does the CCFR measurement of the Gross–Llewelyn Smith sum rule tell us?
نویسنده
چکیده
What does the CCFR measurement of the Gross–Llewelyn Smith sum rule tell us? Abstract Recently the CCFR Collaboration reported the measurement of the Gross–Llewellyn Smith sum rule 1 0 dF νp+νp 3 (x, Q 2 = 3 GeV 2) = 2.50±0.018(stat). Subsequently Kataev and Sidorov analyzed the Q 2 –dependence of this sum rule and pointed out a discrepancy between the results obtained via integration of the NLO fits to xF 3 (x, Q 2) and the purely perturbative prediction. We suggest an explanation of this disagreement and show that the result of the CCFR measurement of the GLS sum rule integral can be determined from the knowledge of the value of Λ MS only. The Gross–Llewellyn Smith sum rule provides one of the important bridges between the QCD improved quark–parton model and the constituent quark model. Moreover, the quantity G(Q 2) ≡ 1 2
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