نتایج جستجو برای: q2 stone
تعداد نتایج: 29407 فیلتر نتایج به سال:
PURPOSE To report the prevalence of dry eye syndrome (DES) in a subset of patients > 50 years old in Valladolid, Spain, calculate internal validity of two DES screening questionnaires, and correlate the results with DES diagnostic tests. METHODS Patients > 50 years-old were randomly selected from the medical network census in Valladolid; they answered the modified McMonnies questionnaire (Q1)...
A multidimensional extraction of the structure function ratio ?LT?/?0 from hard exclusive e?p?e?n?+ reaction above resonance region has been performed. The study was done based on beam-spin asymmetry measurements using a 10.6 GeV incident electron beam liquid-hydrogen target and CLAS12 spectrometer at Jefferson Lab. focus very forward regime (t/Q2 ? 1) with wide kinematic range xB in valence (0...
General solution of RG equations in the framework of background perturbation theory is written down in the large Nc limit. A simplified (model) approximation to the general solution is suggested which allows to write β(α) and α(β) to any loop order. The resulting αB(Q 2) coincides asymptotically at large |Q2| with standard (free) αs, saturates at small Q2 ≥ 0 and has poles at time-like Q2 in ag...
After reviewing QCD definitions of the chiral-odd spin-dependent parton distributions h1(x,Q) and hL(x,Q 2), I will summarize the main feature of the recent two results in perturbative QCD: (i) Next-to-leading order Q2 evolution of h1(x,Q). (ii) Leading order Q2 evolution of the twist-3 distribution hL(x,Q 2) and the universal simplification of the Q2 evolution of all the twist-3 distributions ...
We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state interactions and meson-exchange current effects is very good at Q2 = 0.1 (GeV/c)2, while a small discrepancy at Q2 = 0.2 (GeV/c)2 is observed.
Let the functions q1 be analytic and let q2 be analytic univalent in the unit disk. Using the methods of differential subordination and superordination, sufficient conditions involving the Schwarzian derivative of a normalized analytic function f are obtained so that either q1 z ≺ zf ′ z /f z ≺ q2 z or q1 z ≺ 1 zf ′′ z /f ′ z ≺ q2 z . As applications, sufficient conditions are determined relati...
Recent precision spin-structure data from Jefferson Lab have significantly advanced our knowledge of nucleon structure at low Q2. Results on the neutron spin sum rules and polarizabilities in the low to intermediate Q2 region are presented. The Burkhardt-Cuttingham Sum Rule was verified within experimental uncertainties. When comparing with theoretical calculations, results on spin polarizabili...
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