نتایج جستجو برای: k2
تعداد نتایج: 5516 فیلتر نتایج به سال:
ai−d πd ∫ dk1 d k2 [(k1 − k)2]a1 [(k2 − k)2]a2 [(k1 − k2)]3(k 2) a4(k2 1) a5 (1.1) in d-dimensional Euclidean momentum space. It has a long and interesting history. For many years, most of the information we had about perturbative quantum field theory was coming (directly or indirectly) from this integral. All massless three-loop self-energy integrals (with integer indices) reduce to 6 master i...
The inositol pyrophosphate disphosphoinositol pentakisphosphate (PP-InsP(3)/InsP(7)) is formed in mammals by two recently cloned inositol hexakiphosphate kinases, InsP(6)K1 and InsP(6)K2 (Saiardi, A., Erdjument-Bromage, H., Snowman, A. M., Tempst, P., and Snyder, S. H. (1999) Curr. Biol. 9, 1323-1326). We now report the identification, cloning, and characterization of a third InsP(7) forming en...
We investigate a hard-core boson model with ring-only exchanges on a square lattice, where a K1 term acts on 1×1 plaquettes and aK2 term acts on 1×2 and 2×1 plaquettes, with a goal of realizing a novel exciton Bose liquid (EBL) phase first proposed by Paramekanti et al. [Phys. Rev. B 66, 054526 (2002)]. We construct Jastrow-type variational wave functions for the EBL, study their formal propert...
For simplicity, we follow the rules: V denotes a real linear space, W denotes a subspace of V , x denotes a set, n denotes a natural number, v denotes a vector of V , K1, K2 denote linear combinations of V , and X denotes a subset of the carrier of V . We now state a number of propositions: (1) If X is linearly independent and the support of K1 ⊆ X and the support of K2 ⊆ X and ∑ K1 = ∑ K2, the...
Isooctane extraction of cells from Nocardia restrictus and Corynebacterium simplex followed by chromatographic separation gave yellow crystals which were identified as vitamin K2(35) by its ultraviolet absorption, nuclear magnetic resonance spectrum, and mass spectrometry. The purified vitamin K2(35) was found to stimulate steroid 1,2-dehydrogenase obtained from cell free extracts of N. restric...
The neutral pion electroproduction on the proton is considered in the framework phenomenological model based on the PCAC, current algebra with hard pions and chiral symmetry breaking interaction. The swave differential cross-section of the electroproduction of neutral pions off protons near the threshold is predicted as function photon momentum transfer squared k2 . The swave multipoles ReE0+ a...
In this paper, we develop several general techniques to investigate modular invariants of conformal field theories whose algebras of the holomorphic and anti-holomorphic sectors are different. As an application, we find all such “heterotic” WZNW physical invariants of (horizontal) rank four: there are exactly seven of these, two of which seem to be new. Previously, only those of rank ≤ 3 have b...
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