The general behavior of NLO unintegrated parton distributions based on the single-scale evolution and the angular ordering constraint

Some non-trivial features of the QCD-improved parton model relevant to applications on heavy particle production and semi-hard (small-x) processes of interest to collider physics are reviewed. The underlying ideas are illustrated by a simple example. Limitations of the naive parton formula as well as first order corrections and subtractions to it are dis-cussed in a quantitative way. The behavior of parton distribution functions at small x and for heavy quarks are discussed. Recent work on possible impact of unconventional small-x behavior of the parton distributions on small-x physics at SSC and Tevatron are summarized. The Drell-Yan process is found to be particularly sensitive to the small x dependence of parton distributions. Measurements of this process at the Tevatron can provide powerful constraints on the expected rates of semi-hard processes at the SSC.

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Double parton distributions in the pion from lattice QCD

Journal of High Energy Physics ◽

10.1007/jhep02(2021)067 ◽

2021 ◽

Vol 2021 (2) ◽

Author(s):

Gunnar S. Bali ◽

Luca Castagnini ◽

Markus Diehl ◽

Jonathan R. Gaunt ◽

Benjamin Gläßle ◽

...

Keyword(s):

Spatial Distribution ◽

Lattice Qcd ◽

Quark Mass ◽

Matrix Elements ◽

Parton Distributions ◽

Almost All ◽

The Relationship

Abstract We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions. We investigate correlations in the spatial distribution of two partons in the pion, as well as correlations involving the parton polarisation. The patterns we observe depend significantly on the quark mass. We investigate the assumption that double parton distributions approximately factorise into a convolution of single parton distributions.

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3D Printing of Biphasic Inks: Beyond Single-Scale Architectural Control

Journal of Materials Chemistry C ◽

10.1039/d1tc02117f ◽

2021 ◽

Author(s):

Gianluca Cidonio ◽

Marco Costantini ◽

Filippo Pierini ◽

Chiara Scognamiglio ◽

Tarun Agarwal ◽

...

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

Disruptive Technology ◽

Main Research ◽

Single Scale

To date, Additive Manufacturing (AM) has come to the fore as a major disruptive technology embodying two main research lines - developing increasingly sophisticated printing technologies and new processable materials....

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