Definition of "multiplet" []

• A spectral line having more than one component, representing slight variations in the energy states characteristic of an atom. (noun)
• Any of several classes or groupings of subatomic particles, such as the nucleon, that are similar in most properties but different in electric charge. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In multicomponent DM scenarios, a dark force would preclude large shifts in the rate for Higgs decay to two photons associated with DM-multiplet loops that might otherwise lead to measurable deviations at the LHC or a future linear collider."
• "This might also mean there is a higher mass multiplet of leptons as well, though those should have been detected if they exist."
• "This gets of course into string theory, and the closed string which carry the supergravity multiplet couples to the D-brane of the universe more strongly by coupling to or transforming to an open IIB string."