Speaker
Description
As one of the potential candidates for dark matter, the dark photon ($\rm{A}^{'}$) could act as a mediator between dark matter particles, analogous to the photon ($\gamma$) in the Standard Model. The dark photon could be detected through its kinetic mixing with the QED photon, with the strength of this coupling suppressed by a factor labeled $\epsilon$. This allows dark photons to be produced in laboratory environments via processes that generate ordinary photons, for example $\pi^{0}$/$\eta\rightarrow\gamma\rm{A}^{'}$, which can then decay into visible Standard Model final states.
In this presentation, we will present the search for prompt-like massive dark photon produced in Ru+Ru and Zr+Zr collisions at $\sqrt{s_{NN}}$ = 200 GeV, using the STAR detector through $\rm{A}^{'}\rightarrow e^{+}e^{-}$ decay. The search focuses on the invariant mass range up to 100 MeV/$c^{2}$. If no statistically significant signal is observed, an upper limit on $\epsilon$ will be reported. The dark photon search is crucial for extending our understanding of new physics beyond the Standard Model.
| Is this an experimental talk? | Yes |
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| Is this on behalf of a collaboration? | Yes |
| Which collaboration? | STAR |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |