A hidden confining world on the 750 GeV diphoton excess

Understand

We explain the recent diphoton excesses around $750$ GeV by both ATLAS and CMS as a singlet scalar $\Phi$ which couples to SM gluon and neutral gauge bosons only through higher dimensional operators.

• A natural explanation is that $\Phi$ is a pseudo-Nambu-Goldstone boson (pNGB) which receives parity violation through anomaly if there exists a hidden strong dynamics.
• The singlet and other light pNGBs will decay into two SM gauge bosons and even serves as the meta-stable coloured states which can be probed in the future.
• By accurately measuring their relative decay and the total production rate in the future, we will learn the underlying strong dynamics parameter.