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

We study in detail the model by Isidori and Kamenik that is claimed toexplain the top quark forward-backward asymmetry at Tevatron, provide GeV-scaledark matter (DM), and possibly improve the agreement between data and theory inTevatron W+jj events. We compute the DM thermal relic density, thespin-independent DM-nucleon scattering cross section, and the cosmic microwavebackground constraints on both Dirac and Majorana neutralino DM in theparameter space that explains the top asymmetry. A stable light neutralino isnot allowed unless the local DM density is 3-4 times smaller than expected, inwhich case Dirac DM with mass around 3 GeV may be possible, to be tested by thePlanck mission. The model predicts a too broad excess in the dijet distributionand a strong modification of the missing E_T distribution in W+jj events.

Direct detection and CMB constraints on light DM scenario of top quark asymmetry and dijet excess at Tevatron