The charm quark gives an idea for the theoretical "chameleon particle".

The chameleon particle is a theoretical particle that is at the same time fermion and boson. Fermions are forming atomic structures like atoms, their electron cores, protons, and neutrons. 

And things like gluons and quarks and electrons are fermions. The fermions are the main group that is separated into two subgroups quarks and leptons. So electrons are leptons. 

The bosons transmit some of the four nuclear forces. Transmitters of three nuclear forces strong interaction, weak interaction, and electromagnetic forces are known. The transmitter of gravitation is unknown. 

That hypothetical particle is named "graviton" and researchers made many models of that particle. They know that graviton exists because gravitation is wave motion. So wave-particle duality also belongs in gravitation. 

Those bosons are force carriers for three known forces. Gluons transmit a strong nuclear interaction or strong nuclear force. 

W and Z bosons transmit weak interaction or weak nuclear force. And that's why they are called "weak bosons". Photons transmit electromagnetic interaction or electromagnetism. And the transmitter of the gravitation is unknown. Every single fundamental force is interaction. 

The hypothetical chameleon practice would act as transmitter and element. The idea of the chameleon particle is simple. The same particle would form the atomic structures and transmit some nuclear forces. But the fact is that nobody has seen that chameleon particle yet. 

Somebody believed that the Higgs boson was the particle that transmits gravitation. But the problem is that the Higgs boson was not that particle. And this thing makes Higgs boson mysterious. There is no force that the Higgs boson transports.

But there is one rule in the universe. All particles have some kind of role in the entirety. When we are thinking about the shape of all particles and base forces all of those forces have particle and wave motion forms. The discovery of gravitational waves proves that thing. 

So could the Higgs boson be the chameleon particle? Could it transport the so-called hypothetical "Higgs force"? The thing is that the Higgs boson also has wave-particle duality. So Higgs boson acts like photons and other bosons. And if that particle will impact the universe that thing causes the wave motion cone. And that thing means that the Higgs boson can be the key to graviton and dark energy. 

Image and sources. 

https://en.wikipedia.org/wiki/Electromagnetism

https://en.wikipedia.org/wiki/Standard_Model

https://en.wikipedia.org/wiki/Strong_interaction

https://en.wikipedia.org/wiki/Weak_interaction