نتایج جستجو برای: 35 q2
تعداد نتایج: 183453 فیلتر نتایج به سال:
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...
Strategic games: simultaneous choices of 2 or more players • 2 firms: P1 sets q1 and maximizes payoff π1(q1, q2), P2 sets q2 and maximizes payoff π2(q1, q2). Want simultaneous optimal choices given the other player’s choice. • Chapters 2: Finite number of choices for each player • Chapters 3: Continuous choice of quantity for each player • Chapter 4: Play choices probabilistically, mixed strate...
DECT means acquiring the same object at two different energies, respectively two different tube voltages U1 and U2. The raw data q1 and q2 undergo a decomposition process of type p = p(q1,q2). The raw data p are reconstructed to obtain monochromatic images of the attenuation mu, of the object density rho, or of a specific material distribution. Recent advances in DECT focus on noise reduction t...
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