# 2019 Meeting of the Division of Particles & Fields of the American Physical Society

29 July 2019 to 2 August 2019
Northeastern University
US/Eastern timezone

## The REDTOP experiment: Rare Eta Decays with a TPC for Optical Photons

1 Aug 2019, 16:54
18m
Shillman 335 (Northeastern University)

### Shillman 335

#### Northeastern University

Oral Presentation Beyond Standard Model Physics

### Speakers

Prof. Corrado Gatto (Istituto Nazionale di Fisica Nucleare and Northern Illinois University) The REDTOP Collaboration

### Description

The $\eta$ and $\eta'$ mesons are almost unique in the particle universe since they are Goldstone boson and the dynamics of their decay are strongly constrained.
Because the eta has no charge, decays that violate conservation laws can occur
without interfering with a corresponding current. The integrated eta meson
samples collected in earlier experiments have been about ~$10^9$ events, dominated by the WASA at Cosy experiment, limiting considerably the search for such rare decays. A new experiment, REDTOP, is being proposed, either at the proton Delivery Ring of Fermilab or at the PS at CERN, with the intent
of collecting more than $10^{13}$ eta/year ($10^{11}$ eta'/year) for studying of rare $\eta$ decays.
Such statistics are sufficient for investigating several symmetry violations,
and for searches of new particles beyond the Standard Model. Recent studies have indicated that REDTOP has vey good sensitivity to processes that couple to the Standard Model through three so-called portals: the vector, the scalar and the axion portal. An upgraded version of the detector will be proposed, at a later stage, for running at PIP-II, where the $\eta$ mesons will be produced with tagging.
The physics program, the accelerator systems and the detector for REDTOP will be
discussed during the presentation.

### Primary author

Prof. Corrado Gatto (Istituto Nazionale di Fisica Nucleare and Northern Illinois University)

### Co-author

The REDTOP Collaboration

### Presentation Materials

 DPF20190801.pdf DPF20190801.pptx