English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Two- and three-particle distribution amplitudes of heavy pseudoscalar mesonsof well-defined geometric twist are introduced. They are obtained fromappropriately parametrized vacuum-to-meson matrix elements by applying thosetwist projectors which determine the enclosed light-cone operators of definitegeometric twist and, in addition, observing the heavy quark constraint.Comparing these distribution amplitudes with the conventional ones of dynamicaltwist we derive relations between them, partially being of Wandzura-Wilczektype; also sum rules of Burkhardt-Cottingham type are derived.The derivation isperformed for the (double) Mellin moments and then re-summed to the non-localdistribution amplitudes. Furthermore, a parametrization of vacuum-to-mesonmatrix elements for non-local operators off the light-cone in terms ofdistribution amplitudes accompanying independent kinematical structures isderived.Comment: 18 pages, Latex 2e, no figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>-meson distribution amplitudes of geometric twist versus dynamical twist

B-meson distribution amplitudes of geometric twist versus dynamical twist