from a malayalam language newspaper i read about Higgsboson that is according to standard model the Higgsboson is the piece of the atom that endows all the other piece with their mass. when electrons,quarks,etc are associated with higgs field they get mass. the light particle called photons have no mass bcoz it didnt associated with higgs field. so they move @Speed of light. but when light entered to a medium such as water its speed reduced to 3by4 th of speed at vacuum. why? is that due to the light particle associated with higgs field?