A D-brane alternative to unification

Antoniadis, Ignatios; Kiritsis, Elias; Tomaras, T.N.

doi:10.1016/s0370-2693(00)00733-4

Cited by 243 publications

(425 citation statements)

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“…This affects certainly issues of unification, [25,26], but it also implies that in a generic bulk gravitational background such realizations would provide SM particles with different light speeds. This would be particularly prominent for right-handed neutrinos as they would naturally emerge from the "bulk" in such constructions, 2 [25][26][27]. Similar observations on LV were made on RS braneworlds in [30,31].…”

Section: Jhep01(2013)030mentioning

confidence: 99%

Lorentz violation, gravity, dissipation and holography

Kiritsis

2013

J. High Energ. Phys.

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We reconsider Lorentz Violation (LV) at the fundamental level. We argue that Lorentz Violation is intimately connected with gravity and that LV couplings in QFT must always be fields in a gravitational sector. Diffeomorphism covariance, implementing general charnges of frame, is intact and the LV couplings transform as tensors under coordinate/frame changes. Therefore searching for LV is one of the most sensitive ways of looking for new physics, either new interactions or modifications of known ones. Energy dissipation/Cerenkov radiation is shown to be a generic feature of LV in QFT. A general computation is done in strongly coupled theories with gravity duals. It is shown that in scale invariant regimes, the energy dissipation rate depends non-trivially on two characteristic exponents, the Lifshitz exponent and the hyperscaling violation exponent.

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Section: Jhep01(2013)030mentioning

confidence: 99%

Lorentz violation, gravity, dissipation and holography

Kiritsis

2013

J. High Energ. Phys.

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“…Bino dominated patterns include, for example, the (SUPs) mSP(5-10) and (SOPs) mSP (11)(12)(13). A large density of the model points also occur in the vicinity of a Higgs pole [10].…”

Section: Nuspmentioning

confidence: 99%

“…For the case of non universal SUGRA models, 15 new mass patterns are uncovered labeled NUSP (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). In a class of models based on Dbranes (to be discussed shortly), 6 more new patterns labeled as DBSP(1-6) are also revealed.…”

Section: Nuspmentioning

confidence: 99%

Superparticle Signatures: from PAMELA to the LHC

Feldman

2010

Nuclear Physics B - Proceedings Supplements

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Signatures of soft supersymmetry breaking at the CERN LHC and in dark matter experiments are discussed with focus drawn to light superparticles, and in particular light gauginos and their discovery prospects. Connected to the above is the recent PAMELA positron anomaly and its implications for signatures of SUSY in early runs at the Large Hadron Collider. Other new possibilities for physics beyond the Standard Model are also briefly discussed. Dual Probes of SUSYWe review here testable predictions of high scale models with universal and non universal soft [supersymmetry] 1 breaking within the framework of applied supergravity (SUGRA) and effective models of string theories with D-branes supporting chiral gauge theories (for recent related reviews see [2,3]). Common to all these models are the ingredients needed for working in the predictive SUGRA framework, namely: (a) an effective Kähler metric which generally depends on moduli, (b) a gauge kinetic function also dependent on such scalars, and (c) a superpotential comprised of visible and hidden sector fields and a bilinear term for the Higgses.An important set of predictions of the models discussed here is that they can offer the possibility of a relatively light gluino and electroweak gauginos with dark matter which is naturally Majorana. Thus the confluence of LHC signatures and signatures of dark matter play a central role in understanding the predictions of the above models. This connection is illuminated through knowledge of the possible sparticle mass hierarchies that can arise [4]. These mass hierarchies include the possibility of light scalars. However, naturalness/radiative electroweak symmetry breaking (REWSB) tend to point us to light gauginos and heavy squarks which generally occur on the upper Hyperbolic Branch (HB) of REWSB [6] often re-1 For recent clear reviews see [1] ferred to as the focus point (FP) region. This region naturally arises in the minimal supergravity framework [7] and its extensions which are typically perturbations around universality.Towards the end of this overview we will further discuss the connection between dark matter and the LHC, but more specifically in terms of the link between the WMAP data and the recent PAMELA positron excess [8]. Should the PAMELA anomaly be attributed to SUSY dark matter, the eigen-composition of the LSP plays a very relevant role. In addition, the composition of the LSP has important implications for collider signatures, and thus a direct bearing on the discovery prospects of SUSY at LHC, as well as the very nature of how dark matter was produced in the early universe. Resolving the Sparticle LandscapeWe begin with the Sparticle Landscape [4]. Of the 32 massive particles predicted in the MSSM, the number of ways in which the sparticle masses can stack up in their mass hierarchy is a priori undetermined unless an underlying framework is specified. Thus, if the 32 masses are treated as essentially all independent, then aside from sum rules on the Higgs, sfermions, and gaugino masses, and without im...

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“…Note that this limited class of models with low string-scales may result in different higher-dimensional extensions of the SM [8,9], even if gravity is completely ignored. Hence, the actual experimental limits on the compactification radius are, to some extent, model dependent.…”

Section: Mc-th-2002-06 Wue-itp-2002-025mentioning

confidence: 99%

An Introduction to 5-Dimensional Extensions of the Standard Model

Mueck

Pilaftsis

Rueckl

2004

Heavy Quark Physics

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Abstract. We give a pedagogical introduction to the physics of large extra dimensions. We focus our discussion on minimal extensions of the Standard Model in which gauge fields may propagate in a single, compact extra dimension while the fermions are restricted to a 4-dimensional Minkowski subspace. First, the basic ideas, including an appropriate gauge-fixing procedure in the higher-dimensional context, are illustrated in simple toy models. Then, we outline how the presented techniques can be extended to more realistic theories. Finally, we investigate the phenomenology of different minimal Standard Model extensions, in which all or only some of the SU(2)L and U(1)Y gauge fields and Higgs bosons feel the presence of the fifth dimension. Bounds on the compactification scale between 4 and 6 TeV, depending on the model, are established by analyzing existing data.

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A D-brane alternative to unification

Cited by 243 publications

References 16 publications

Lorentz violation, gravity, dissipation and holography

Lorentz violation, gravity, dissipation and holography

Superparticle Signatures: from PAMELA to the LHC

An Introduction to 5-Dimensional Extensions of the Standard Model

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