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- W2146342246 abstract "Following the recent method due to Hill, Shafi, and Wetterich, we investigate the impact of higher-dimensional operators (densuremath{ge}5) induced by gravity and compactification of extra dimensions, on the minimal SU(5) grand unified theory. Modifications caused by the d=5 operator alone seem to be ruled out, even if the compactification scale ${M}_{C}$ is as low as ${10}^{17}$ GeV, as they require ${mathrm{sin}}^{2}$${mathrm{ensuremath{theta}}}_{mathrm{W}}$ensuremath{le}0.203 in conflict with the present world average. The addition of a six-dimensional operator is found to allow only high unification masses ${M}_{U}$ensuremath{sim}(0.1--1)${M}_{C}$, with ${M}_{C}$${=10}^{17}$--${10}^{19}$ GeV and sin $^{2}mathrm{ensuremath{theta}}_{mathrm{W}}$ensuremath{simeq}0.22--0.24. The grand-unification coupling constant is also found to be significantly smaller." @default.
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- W2146342246 date "1989-01-01" @default.
- W2146342246 modified "2023-09-26" @default.
- W2146342246 title "Gravity-induced large grand-unification mass in SU(5) with higher-dimensional operators" @default.
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- W2146342246 doi "https://doi.org/10.1103/physrevd.39.316" @default.
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