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In particle physics, the doublet–triplet (splitting) problem is a problem of some Grand Unified Theories, such as SU(5), SO(10), and .Grand unified theories predict Higgs bosons (doublets of ()) arise from representations of the unified group that contain other states, in particular, states that are triplets of color.
This is known as the doublet–triplet (DT) splitting problem: In order to be consistent we have to 'split' the 'masses' of and , but for that we need to fine-tune and . There are however some solutions to this problem (see e.g. [ 3 ] ) which can work quite well in SUSY models.
Unfortunately, this same 10 also contains triplets. The masses of the doublets have to be stabilized at the electroweak scale, which is many orders of magnitude smaller than the GUT scale whereas the triplets have to be really heavy in order to prevent triplet-mediated proton decays. See doublet-triplet splitting problem.
In quantum mechanics, a doublet is a composite quantum state of a system with an effective spin of 1/2, such that there are two allowed values of the spin component, −1/2 and +1/2. Quantum systems with two possible states are sometimes called two-level systems .
The exchange of a triplet Higgs with mass M can lead to all of the operators suppressed by /. See Doublet–triplet splitting problem. Proton decay. These graphics refer to the X bosons and Higgs bosons.
Here are the first two letters for each word: WA. WA. CR. FU. QU. GI. LU (SPANGRAM) NYT Strands Spangram Answer Today. Today's spangram answer on Sunday, December 15, 2024, is LUNARPHASE.
The debt ceiling returned on January 2, but Congress has several months to address it before the nation could default on its obligations. (Jemal Countess/Getty Images)
Behati Prinsloo is playing Santa!. The model, 36, revealed how she and husband Adam Levine, 45, spent the holidays with their daughters Dusty Rose, 8, and Gio Grace, 6, and their 1-year-old son in ...
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