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

In this paper we propose to use the measurement of the thermal Quark-GluonPlasma (QGP) dilepton spectra in the Intermediate Mass Region (IMR) ofheavy-ion collisions, as a new method to search for GeV-scale dark gauge bosons(gamma' or Z'). Such light mediators are a common feature of light (i.e. lowmass) dark matter scenarios, which have been invoked to explain puzzlingsignals in dark matter indirect and direct detection experiments. First we showthat a light gamma' or Z' will generate a resonant enhancement of the dileptonspectrum produced thermally by the QGP, at an energy corresponding to the darkgauge boson mass. Secondly, using data from the PHENIX experiment, we are ableto set an upper limit on the combined coupling of this new gauge boson toquarks and leptons (independently of their vectorial or axial nature) chi_qchi_e < 10^(-3) at the 95% confidence level for a gauge boson mass in the range1.5 - 2.5 GeV. This result complements previous searches for new light gaugebosons and probes a new region of the parameter space, particularly interestingin the case of non-universal couplings to quarks and leptons. Prospects for thediscovery of such a boson by the ALICE collaboration are also discussed.

Searching for GeV-scale new Gauge Bosons in QGP thermal dilepton production