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

The presence of additional particles during inflation leads tonon-Gaussianity in late-time correlators of primordial curvature perturbations.The shape and amplitude of this signal depend on the mass and spin of the extraparticles. Constraints on this distinct form of primordial non-Gaussianity,therefore, provide a wealth of information on the particle content duringinflation. We investigate the potential of upcoming galaxy surveys inconstraining such a signature through its impact on the observed galaxy powerspectrum. Primordial non-Gaussianity of various shapes induces ascale-dependent bias on tracers of large-scale structure, such as galaxies.Using this signature we obtain constraints on massive particles duringinflation, which can have non-zero spins. In particular, we show that theprospects for constraining particles with spins 0 and 1 are promising, whileconstraining particles with spin 2 from power spectrum alone seems challenging.We show that the multi-tracer technique can significantly improve theconstraints from the power spectrum by at least an order of magnitude.Furthermore, we analyze the effect of non-linearities due to gravitationalevolution on the forecasted constraints on the masses of the extra particlesand the amplitudes of the imprinted non-Gaussian signal. We find thatgravitational evolution affects the constraints by less than a factor of 2.

Scale-Dependent Galaxy Bias from Massive Particles with Spin during Inflation