We present a systematic study demonstrating the impact of lattice QCD data on the extraction of generalised parton distributions (GPDs). For this purpose, we use a previously developed modelling of ...GPDs based on machine learning techniques fulfilling the theoretical requirements of polynomiality, a form of positivity constraint and known reduction limits. A special care is given to estimate the uncertainty stemming from the ill-posed character of the connection between GPDs and the experimental processes usually considered to constrain them, like deeply virtual Compton scattering (DVCS). Moke lattice QCD data inputs are included in a Bayesian framework to a prior model based on an Artificial Neural Network. This prior model is fitted to reproduce the most experimentally accessible information of a phenomenological extraction by Goloskokov and Kroll. We highlight the impact of the precision, correlation and kinematic coverage of lattice data on GPD extraction at moderate
ξ
which has only been brushed in the literature so far, paving the way for a joint extraction of GPDs.
We investigate qualitatively a uniform non-Brownian sedimenting suspension in a stationary state. As a base of our analysis we take the BBGKY hierarchy derived from the Liouville equation. We then ...show that assumption of the plasma-like screening relations can cancel some long-range terms in the hierarchy but it does not provide integrable solutions for correlation functions. This suggests breaking the translational symmetry of the system. Therefore a non-uniform structure can develop to suppress velocity fluctuations and make the range of correlations finite.
We calculate large mass diphoton exclusive photoproduction in the
framework of collinear QCD factorization at next to leading order in
\alpha_s
α
s
and at leading twist. Collinear divergences of the ...coefficient function
are absorbed by the evolution of the generalized parton distributions
(GPDs). This result enlarges the existing factorization proofs to
2 \to 3
2
→
3
processes, opening new reactions to a trustable extraction of GPDs.
Artykuł podejmuje kwestię roli chrześcijańskiej idei wcielenia w dyskursie dotyczącym perspektywy społeczeństwa postludzkiego, zwłaszcza zaś integracji umysłów w technologicznej osobliwości. ...Wcielenie w swoim wymiarze wspólnotowym, jak choćby koncepcja zjednoczenia wiernych w Mistycznym Ciele Chrystusa, czy indywidualnym wymiarze przebóstwienia człowieka stanowi ideowy fundament transhumanizmu. Technologiczna osobliwość rozumiana jako szczytowy punkt ewolucji człowieka, w którym dokona się integracja technologii i biologii organizmu staje się współczesnym substytutem wcielenia Syna Bożego i nadziei, które wierzący pokładają w tym dogmacie. W ten sposób transhumanizm wyznacza sobie identyczne cele jak chrześcijaństwo, ale obiecuje zrealizować je odmiennymi, technologicznymi mianowicie środkami.
Abstract The long-time behavior of highly elastic fibers in a shear flow is investigated experimentally and numerically. Characteristic attractors of the dynamics are found. It is shown that for a ...small ratio of bending to hydrodynamic forces, most fibers form a spinning elongated double helix, performing an effective Jeffery orbit very close to the vorticity direction. Recognition of these oriented shapes, and how they form in time, may prove useful in the future for understanding the time history of complex microstructures in fluid flows and considering processing steps for their synthesis.
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