Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-07-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures, 3 tables
Scientific paper
We have shown that the $B-L$ generation due to the decay of the thermally produced superheavy fields can explain the Baryon assymmetry in the universe if the superheavy fields are heavier than $10^{13-14}$ GeV. Note that although the superheavy fields have non-vanishing charges under the standard model gauge interactions, the thermally prduced baryon asymmetry is sizable. The $B-L$ violating effective operators induced by integrating the superheavy fields have dimension 7, while the operator in the famous leptogenesis has dimension 5. Therefore, the constraints from the nucleon stability can be easily satisfied.
Enomoto Seishi
Maekawa Nobuhiro
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