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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a very general argument that the analogue of a heavy pentaquark (astate with the quantum numbers of a baryon combined with an additional lightquark and a heavy antiquark) must exist as a particle stable under stronginteractions in the combined heavy quark and large Nc limits of QCD. Moreover,in the combined limit these heavy pentaquark states fill multiplets ofSU(4)xO(8)xSU(2). We explore the question of whether corrections in thecombined 1/Nc and 1/mQ expansions are sufficiently small to maintain thisqualitative result. Since no model-independent way is known to answer thisquestion, we use a class of ``realistic'' hadronic models in which a pentaquarkcan be formed via nucleon-heavy meson binding through a pion-exchangepotential. These models have the virtue that they necessarily yield the correctbehavior in the combined limit, and the long-distance parts of the interactionsare model independent. If the long-distance attraction in these models were topredict bound states in a robust way (i.e., largely insensitive to the detailsof the short-range interaction), then one could safely conclude that heavypentaquarks do exist. However, in practice the binding does depend verystrongly on the details of the short-distance physics, suggesting that the realworld is not sufficiently near the combined large Nc, mQ limit to use it as areliable guide. Whether stable heavy pentaquarks exist remains an openquestion.Comment: 11 pages; references adde

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

On the existence of heavy pentaquarks: The large<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>N</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>and heavy quark limits and beyond

On the existence of heavy pentaquarks: The largeNcand heavy quark limits and beyond