ILC Workshop on Potential Experiments (ILCX2021)

Search for new light particles using MeV photon beam at the ILC

28 Oct 2021, 16:30

30m

Room #6 (Zoom Meeting ID: 819 7353 2455)

Oral presentation using Zoom Session O: Fixed target / Dark sectors / Applications outside particle physics H&O: BSM particle production & Fixed target / Dark sectors / Applications outside particle physics

Speaker

Hajime Fukuda

Description

As a postron source at the ILC, it is discussed to use pair creation processes by a $\mathcal{O}(\text{MeV})$ photon beam, which is generated from the high-energy electron beam. The current design expects that the photon flux would be as intense as ${10}^{17}$ photons / s, being the strongest MeV photon source available on the ground.
We propose to use this photon beam for the search for new light particles. As a benchmark model, we discuss the dark photon and the QCD axion. The use of the energetic photon beam opens a new window for relatively heavy mass regions, i.e. $\le \mathcal{O}(100)\text{eV}$. We have found that our proposal can constrain not only new parameter regions as a ground experiment but also some physical parameter region of the QCD axion.

Presentation materials

ilcx.pdf