Source of CP Violation for Baryon Asymmetry of the Universe

Details Source of CP Violation for Baryon Asymmetry of the Universe Source of CP Violation for Baryon Asymmetry of the Universe

2008-03-08

arxiv.org/abs/0803.1234v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, style change and other revisions; version rejected by PRL

Scientific paper

The baryon asymmetry of the Universe requires CP violation, but the Standard Model falls short by a factor of $10^{-10}$ or more. Starting from a clue at the $B$ factories, we point out that the large Yukawa couplings of the sequential fourth generation $t^\prime$ and $b^\prime$ quarks can provide enhancement by a factor of over $10^{13}$, making the 2-3-4 generation quark sector a viable source of CP violation for the baryon asymmetry of the Universe. With recent hints of large $\sin2\Phi_{B_s}$ in $B_s^0$-$\bar B_s^0$ mixing from the Tevatron, the ultimate test would be to discover the $t^\prime$ and $b^\prime$ quarks at the Large Hadron Collider.

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