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Observable Proton Decay from Planck Scale Physics · Around

2012

Observable Proton Decay from Planck Scale Physics

Barr, Stephen M., Calmet, Xavier

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In the Standard Model, no dim-5 $\Delta B \neq 0$ operators exist, so that Planck-scale-induced proton decay amplitudes are suppressed by at least $1/M^2_{P \ell}$.

If the Standard Model is augmented by a light, color-non-singlet boson, then $O(1/M_{P \ell})$ proton-decay amplitudes are possible.
These always conserve $B+L$, so that the dominant decay modes are $p \rightarrow \Pi^+ \nu$ and $p \rightarrow \Pi^+ \Pi^+ \ell^-$, where $\Pi^+ = \pi^+$ or $K^+$.

Built on

S. Weinberg, Phys. Rev. Lett. 43
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F. Wilczek and A. Zee, Phys. Rev. Lett. 43
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S. Weinberg, Phys. Rev. D 22
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