Vector-boson decay modes of the nucleon in<i>N=1</i>supergravity model

A broad overview of the current status of proton stability in unified models of particle interactions is given which includes non-supersymmetric unification, SUSY and SUGRA unified models, unification based on extra dimensions, and string-M-theory models. The extra dimensional unification includes 5D and 6D and universal extra dimensional (UED) models, and models based on warped geometry. Proton stability in a wide array of string theory and M theory models is reviewed. These include Calabi-Yau models, grand unified models with Kac-Moody levels k > 1, a new class of heterotic string models, models based on intersecting D branes, and string landscape models. The destabilizing effect of quantum gravity on the proton is discussed. The possibility of testing grand unified models, models based on extra dimensions and string-M-theory models via their distinctive modes is investigated. The proposed next generation proton decay experiments, HyperK, UNO, MEMPHYS, ICARUS, LANNDD (DUSEL), and LENA would shed significant light on the nature of unification complementary to the physics at the LHC. Mathematical tools for the computation of proton lifetime are given in the appendices. Prospects for the future are discussed.

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“…An analysis of these vector boson decay modes for the supergravity SU(5) model is given in Ref. [151]. Another interesting mode is p → e + γ.…”

Section: Proton Decay In Su (5) Supersymmetric Grand Unificationmentioning

confidence: 99%

Proton stability in grand unified theories, in strings and in branes

Nath

Pérez²

2007

Physics Reports

445

571

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“…Vz121B212, (8) where B, is an overall normalization factor depending on the masses in the loop of FIGURE I . While MH depends upon physics at the G U T scale and cannot be determined theoretically, Enqvist er al.…”

Section: R ( P -F I K + ) = ( ( Y )~( M~) -~I M~~mentioning

confidence: 99%

Probing the Four‐Generation Kobayashi‐Maskawa Matrix with Supergravity Proton Decay

Arnowitt

Nath

1987

Annals of the New York Academy of Sciences

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INTRODUCHONIt may at first sight seem paradoxical to use a decay that has not been seen to test for the existance of a fourth generation that has not been observed. However, proton decay has always represented a strong constraint on any grand unified theory (GUT). Thus in the standard SU(5) G U T model, one has T,,,(P -e+To) 5 2.3 x 10" y, (1) while the experimental lower bound' reXp(pe'r') 2 3.6 x lo3* y (2) is considerably larger. larger than in the Standard Model, In supergravity GUT models, the situation is more complicated. Since MGUT is M G U T 3 1 x 10I6 GeV (3) proton decay proceeds through the exchange of the superheavy Higgsino triplet, followed by gaugino dressing' (FIGURE 1). Each vertex contains Kobayashi-Maskawa (KM) matrix elements. Thus in supersymmetry, proton decay measures the strength of the KM matrix elements, and thus gives information on the number of generations.bTo whom correspondence should be addressed. %isiting Scholar. ePermanent address:

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A comprehensive analysis of nucleon decay into antineutrino plus meson within minimalSU(5) supergravity

Daum

1994

Z. Phys. C - Particles and Fields

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Vector-boson decay modes of the nucleon inN=1supergravity model

Cited by 7 publications

References 23 publications

Proton stability in grand unified theories, in strings and in branes

Proton stability in grand unified theories, in strings and in branes

Probing the Four‐Generation Kobayashi‐Maskawa Matrix with Supergravity Proton Decay

A comprehensive analysis of nucleon decay into antineutrino plus meson within minimalSU(5) supergravity

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