Proton Decay, Black Holes, and Large Extra Dimensions

Adams, Fred C.; Kane, Gordon L.; Mbonye, Manasse R.; Perry, Malcolm J.

doi:10.1142/s0217751x0100369x

Cited by 44 publications

(75 citation statements)

References 17 publications

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“…Localizing quarks and leptons may also be helpful to prevent unacceptably fast proton decay [2,11]. We assume a flat background metric, η M N = Diag[+1, −1, −1, −1, −1], where the large Latin characters M, N, ... refer to the full 5d vector indices and space coordinates x M = {x µ , y} are decomposed into the 4d (uncompactified) subset x µ and the compactified direction, y.…”

Section: Non-supersymmetric Modelsmentioning

confidence: 99%

New Tools for Fermion Masses from Extra Dimensions

Kaplan¹

2001

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We present models in which the observed fermion masses and mixings are generated by dynamically localizing the three generations of matter in a flat compact extra dimension. We first construct models assuming the hierarchy problem is addressed by the existence of large extra dimensions, i.e. the fundamental scale is not far above a TeV and supersymmetry is not imposed. These models are compactified, chiral, and don't require fine-tuning to generate the top mass. Limits on the compactification scale based on flavor-changing neutral currents are relaxed compared to those on existing models. We then supersymmetrize some of these models. Using N = 1 superspace language in extra dimensions, we find space-dependent flat directions which can be used to localize fields. Finally, we discuss methods of breaking supersymmetry and the impact of these models on the superpartner spectrum.

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Section: Non-supersymmetric Modelsmentioning

confidence: 99%

New Tools for Fermion Masses from Extra Dimensions

Kaplan¹

2001

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“…Here, virtual black holes have been predicted to result in fast proton decay [14]. Now, however, we see that protons might be protected by a broken gauge symmetry.…”

Section: Extrapolationsmentioning

confidence: 80%

Time scale for loss of massive vector hair by a black hole and its consequences for proton decay

Pawl¹

2004

Phys. Rev. D

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It has long been known that matter charged under a broken U(1) gauge symmetry collapsing to form a black hole will radiate away the associated external (massive) gauge field. We show that the timescale for the radiation of the monopole component of the field will be on the order of the inverse Compton wavelength of the gauge boson (assuming natural units). Since the Compton wavelength for a massive gauge boson is directly related to the scale of symmetry breaking, the timescale for a black hole to lose its gauge field "hair" is determined only by this scale. The timescale for Hawking radiation, however, is set by the mass of the black hole. These different dependencies mean that for any (sub-Planckian) scale of symmetry breaking we can define a mass below which black holes radiate quickly enough to discharge themselves via the Hawking process before the gauge field is radiated away. This has important implications for the extrapolation of classical black hole physics to Planck-scale virtual black holes. In particular, we comment on the implications for protecting protons from gravitationally mediated decay.

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“…On the other hand, with a smaller Planck mass in the TeV range, the baryon number violating processes would become much more efficient. In fact, Adams et al [19] argued that experimental limits on the proton lifetime constrain the quantum gravity scale to be larger than 10 16 GeV. A possible way to avoid too short life-time of proton is considered in our paper [39], where some other approaches are also discussed and the list of references is presented.…”

Section: "First Sakharov Condition": Baryon Number Violating Decaysmentioning

confidence: 97%

Baryogenesis from gravitational decay of TeV particles in theories with low scale gravity

Bambi¹,

Dolgov²,

Freese³

2007

J. Cosmol. Astropart. Phys.

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In models with the fundamental gravity scale in the TeV range, early cosmology is quite different from the standard picture, because the universe must have arisen at a much lower temperature and the electroweak symmetry was probably never restored. In this context, baryogenesis appears to be problematic: if the involved physics is essentially that of the Standard Model, "conventional" non-conserving baryon number processes are completely negligible at such low temperatures. In this paper we show that the observed matter-antimatter asymmetry of the universe may be generated by gravitational decay of TeV-mass particles: such objects can be out of equilibrium after inflation and, if their mass is of the same order of magnitude as the true quantum gravity scale, they can quickly decay through a black hole intermediate state, violating global symmetries, in particular, baryon number. In this context, we take advantage of the fact that the "Sakharov conditions" for baryogenesis can be more easily satisfied with a low fundamental scale of gravity. *

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Proton Decay, Black Holes, and Large Extra Dimensions

Cited by 44 publications

References 17 publications

New Tools for Fermion Masses from Extra Dimensions

New Tools for Fermion Masses from Extra Dimensions

Time scale for loss of massive vector hair by a black hole and its consequences for proton decay

Baryogenesis from gravitational decay of TeV particles in theories with low scale gravity

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