Proton decay in intersecting D-brane models

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We analyze proton decay via dimension-six operators in certain GUT-like models derived from Type IIA orientifolds with D6-branes. The amplitude is parametrically enhanced by a factor of αGUT-1/3 relative to the corresponding result in four-dimensional GUTs. Nonetheless, even assuming a plausible enhancement from the threshold corrections, we find little overall enhancement of the proton decay rate from dimension-six operators, so that the predicted lifetime from this mechanism remains close to 1036 years.

Original languageEnglish (US)
Pages (from-to)3-20
Number of pages18
JournalNuclear Physics B
Issue number3
StatePublished - Aug 11 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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