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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Supersymmetric extensions of the standard model predict the existence ofnon-topological solitons, $Q$-balls. Assuming the standard cosmological historypreceded by inflation, $Q$-balls can form in the early universe and can make upthe dark matter. The relatively large masses of such dark-matter particlesimply a low number density, making direct detection very challenging. Thestrongest limits come from the existence of neutron stars because, if abaryonic $Q$-ball is captured by a neutron star, the $Q$-ball can absorb thebaryon number releasing energy and eventually destroying a neutron star.However, in the presence of baryon number violating higher-dimension operators,the growth of a $Q$-ball inside a neutron star is hampered once the $Q$-ballreaches a certain size. We re-examine the limits and identify some classes ofhigher-dimensional operators for which supersymmetric $Q$-balls can account fordark matter. The present limits leave a wide range of parameters available fordark matter in the form of supersymmetric $Q$-balls.

Astrophysical constraints on dark-matter $Q$-balls in the presence of baryon-violating operators