نتایج جستجو برای: interferon υ ifn υ
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We compute the rate for diffractive Υ meson production at the Tevatron and the LHC. The Υ is produced diffractively via the subprocess γ+p→ Υ+p where the initial photon is radiated off an incoming proton (or antiproton). We consider the possibility to use low angle proton detectors to make a measurement of the γp cross-section and conclude that a measurement of the cross-section at a centre of ...
We suggest an approach to probing intermittency corrections to the Kolmogorov law in turbulent flows based on the autoregressive moving-average modeling of turbulent time series. We introduce an index Υ that measures the distance from a Kolmogorov-Obukhov model in the autoregressive moving-average model space. Applying our analysis to particle image velocimetry and laser Doppler velocimetry mea...
The BABAR detector, which operates at the SLAC PEP-II asymmetric e+e− collider at energies near the Υ (4S) resonance, started operation on the 26 of May 1999. We present the first study of sin2β, with samples of B → J/ψK S and B → ψ(2S)K S decays, using 9.0 fb−1 of data recorded between January and July 2000 at the Υ (4S) resonance and 0.8 fb−1 recorded 40 MeV below the Υ (4S) resonance. A prel...
Inclusive bottomonium hadroproduction at the Tevatron is firstly examined in a Monte Carlo framework with the colour-octet mechanism implemented in the event generation. We extract some NRQCD colour-octet matrix elements relevant for Υ(1S) hadroproduction. Remarkably we find a quite small contribution (compatible with zero) from feeddown of χ bJ states produced through the colour-octet mechanis...
Scaling law for the Υ(4S) → B ¯ B and ψ(3770) → D ¯ D decay constants from effective sum rules Abstract Sum rules for exclusive production of heavy meson pairs in e + e − annihilation are used to evaluate the Υ(4S) → B ¯ B and ψ(3770) → D ¯ D decay widths. Infinitely heavy quark limit is discussed, so that scaling law for the quarkonium-meson coupling constant is derived. A value of the B ¯ B p...
Dipion transitions of the subthreshold bottomonium levels Υ(nS) → Υ(n ′ S)ππ with n > n ′ , n = 2, 3, 4, n ′ = 1, 2 are studied in the framework of the chiral decay Lagrangian, derived earlier. The channels B ¯ B, B ¯ B * + c.c, B * ¯ B * are considered in the intermediate state and realistic wave functions of Υ(nS), B and B * are used in the overlap matrix elements. Imposing the Adler zero req...
Mammalian IgG and IgE are thought to have evolved from IgY of nonmammalian tetrapods; however, no diversification of IgY subclasses has been reported in reptiles or birds, which are phylogenetically close to mammals. To our knowledge, we report the first evidence of the presence of multiple IgY-encoding (υ) genes in snakes. Two υ genes were identified in the snake Elaphe taeniura, and three υ g...
Sequence assembly from short reads is an important problem in biology. It is known that solving the sequence assembly problem exactly on a bi-directed de Bruijn graph or a string graph is intractable. However, finding a shortest double stranded DNA string (SDDNA) containing all the k-long words in the reads seems to be a good heuristic to get close to the original genome. This problem is equiva...
FETI 3 Theorem 2.1 (u1, u2, λ) solves (2.4) if and only if (u1, u2, λ, μ = c(u2)) solves (2.7). Proof. The theorem is easily established by using the stabilized constraints (2.5) and recalling that τ = 0. The theorem demonstrates that (2.5) represents a consistent stabilization. The impact of this innocuous sleight of hand is that the resulting coarse grid problem is equivalently stabilized. We...
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