نتایج جستجو برای: 35 q2
تعداد نتایج: 183453 فیلتر نتایج به سال:
The dominance of helicity-conserving amplitudes in gauge theory is shown imply universal ratios for the charge, magnetic, and quadrupole form factors spin-one bound states: Gc(Q2) : GM(Q2) : GQ(Q2) = (1 $7) : 2 : -1. These ratios hold at large space-like or time-like momentum transfer in the case of composite systems such as the p or deuteron in &CD. They are also the ratios predicted’for the e...
We generalize the sum rules for the nucleon electric plus magnetic polarizability Σ = α + β and for the nucleon spin-polarizability γ, to virtual photons with Q2 > 0. The dominant low energy cross sections are represented in our calculation by one-pionloop graphs of relativistic baryon chiral perturbation theory and the ∆(1232)-resonance excitation. For the proton we find good agreement of the ...
We compute quark structure functions and the intrinsic Fock space distribution of sea quarks in a hadron wavefunction at small x. The computation is performed in an effective theory at small x where the gluon field is treated classically. At Q2 large compared to an intrinsic scale associated with the density of gluons μ2, large compared to the QCD scale ΛQCD, and large compared to the quark mas...
Let L be a general linear complex in PG(3, q) for any prime power q. We show that when G F(q) is extended to G F(q2), the extended lines of L cover a non-singular Hermitian surface H ∼= H(3, q2) of PG(3, q2). We prove that if S is any symplectic spread PG(3, q), then the extended lines of this spread form a complete (q2 +1)-span of H . Several other examples of complete spans of H for small val...
A multidimensional extraction of the structure function ratio σLT′/σ0 from hard exclusive e→p→e′nπ+ 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...
JNJ-Q2 is a novel, fifth-generation fluoroquinolone that has excellent in vitro and in vivo activity against a variety of Gram-positive and Gram-negative organisms. In vitro studies indicate that JNJ-Q2 has potent activity against pathogens responsible for acute bacterial skin and skin structure infections (ABSSSI) and community-acquired bacterial pneumonia (CABP), such as Staphylococcus aureus...
The inclusive single and double differential cross sections for neutral and charged current processes with Q2 between 200 and 30000 GeV2 are measured in e+p collisions with the H1 detector at HERA using the data taken in 1994-1997, which corresponds to an integrated luminosity of 37 pb 1. The data amount to an increase in statistics by a factor of twelve with respect to the analysis of the 1994...
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