Bibliographies thématiques / Randall-Sundrum (RS) Model

Littérature scientifique sur le sujet « Randall-Sundrum (RS) Model »

Auteur : Grafiati
Publié le 7 septembre 2023

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Articles de revues sur le sujet "Randall-Sundrum (RS) Model"

1

Wulandari, Dewi, Triyanta, Jusak S. Kosasih, Douglas Singleton et Preston Jones. « Localization of interacting fields in five-dimensional braneworld models ». International Journal of Modern Physics A 32, no 32 (20 novembre 2017) : 1750191. http://dx.doi.org/10.1142/s0217751x17501913.

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We study the localization properties of fundamental fields which are coupled to one another through the gauge mechanism both in the original Randall–Sundrum (RS) and in the modified Randall–Sundrum (MRS) braneworld models: scalar–vector, vector–vector, and spinor–vector configuration systems. For this purpose, we derive conditions of localization, namely, the finiteness of integrals over the extra coordinate in the action of the system considered. We also derive field equations for each of the systems and then obtain their solutions corresponding to the extra dimension by a separation of variable method for every field involved in each system. We then insert the obtained solutions into the conditions of localization to seek whether or not the solutions are in accordance with the conditions of localization. We obtain that not all of the configuration systems considered are localizable on the brane of the original RS model while, on the contrary, they are localizable on the MRS braneworld model with some restrictions. In terms of field localizability on the brane, this result shows that the MRS model is much better than the original RS model.
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Kobakhidze, Archil, Kristian L. McDonald, Lei Wu et Jason Yue. « Warped graviton couplings to bulk vectors with brane-localized kinetic terms ». International Journal of Modern Physics A 32, no 33 (30 novembre 2017) : 1745004. http://dx.doi.org/10.1142/s0217751x1745004x.

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In this paper, we realize nonuniversal couplings between Kaluza–Klein (KK) gravitons and bulk Standard Model (SM) vectors in the Randall–Sundrum (RS) model by including both UV and IR brane-localized gauge kinetic terms. We find that such kinetic terms can reduce the couplings of KK gravitons to SM gauge bosons and also ensure the KK vector masses are consistent with electroweak precision constraints.
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Jawad, Abdul, Sabir Hussain, Shamaila Rani et Saba Qummer. « Generalized ghost Tsallis holographic dark energy model in RS-II braneworld and dynamical Chern-Simons modified gravity ». International Journal of Geometric Methods in Modern Physics 17, no 08 (juillet 2020) : 2050124. http://dx.doi.org/10.1142/s0219887820501248.

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In this paper, we studied the cosmological implications of generalized ghost Tsallis holographic dark energy in the framework of Randall–Sundrum II braneworld and Chern–Simons modified gravity in flat FRW universe. We discuss the cosmological parameters like equation of state parameter, deceleration parameter, squared speed of sound, Om-diagnostic and planes like evolving equation of state parameter and statefinders. These models yield useful results in this context.
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COGNOLA, GUIDO, SERGIO ZERBINI, EMILIO ELIZALDE, SHIN'ICHI NOJIRI et SERGEI D. ODINTSOV. « MULTI-GRAVITON THEORY FROM A DISCRETIZED RS BRANE-WORLD AND THE INDUCED COSMOLOGICAL CONSTANT ». Modern Physics Letters A 19, no 19 (21 juin 2004) : 1435–45. http://dx.doi.org/10.1142/s0217732304014148.

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We propose a multi-graviton theory with non-nearest-neighbor couplings in the theory space. The resulting four-dimensional discrete mass spectrum reflects the structure of a latticed extra dimension. For a plausible mass spectrum motivated by the discretized Randall–Sundrum brane-world, the induced cosmological constant turns out to be positive and may serve as a quite simple model for the dark energy of our accelerating universe.
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NOZARI, KOUROSH, et M. SHOUKRANI. « NON-MINIMAL INFLATION ON THE RANDALL–SUNDRUM II BRANE WITH INDUCED GRAVITY ». Modern Physics Letters A 24, no 39 (21 décembre 2009) : 3205–17. http://dx.doi.org/10.1142/s0217732309031132.

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We study an inflation model that inflaton field is non-minimally coupled to the scalar curvature on the Randall–Sundrum (RS) II brane. We investigate the effects of the non-minimal coupling on the inflationary dynamics of this braneworld model. Our study shows that the number of e-folds decreases by increasing the value of the conformal coupling. We compare our model parameters with the minimal case and also with recent observational data. In comparison with recent observation, we obtain a constraint on the values that conformal coupling attains.
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Videla, Nelson, et Grigorios Panotopoulos. « Natural Inflation on the brane with a TeV-scale gravity : Parameter constraints after Planck 2015 ». International Journal of Modern Physics D 26, no 07 (26 décembre 2016) : 1750066. http://dx.doi.org/10.1142/s0218271817500663.

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In the present work, we have studied Natural Inflation (NI) in the framework of the Randall–Sundrum II (RS-II) brane model in the light of the latest Planck results. Adopting the Randall–Sundrum fine-tuning, the model is characterized by three parameters in total, namely the five-dimensional (5D) Planck mass [Formula: see text] and the two mass scales of the inflaton potential [Formula: see text] and [Formula: see text]. We show in the [Formula: see text]–[Formula: see text] plane the theoretical predictions of the model together with the allowed contour plots, and we conclude that the model is viable. By using the Planck results only, it is possible to determine the two mass scales of the inflaton potential in terms of [Formula: see text], which remains undetermined. However, there are several good theoretical reasons to consider a higher-dimensional Planck mass of the order of [Formula: see text][Formula: see text]TeV, which is compatible with primordial nucleosynthesis. If we insist on considering a [Formula: see text] of this order of magnitude, all parameters are known and a sub-Planckian excursion of the inflaton scalar field is achieved.
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de Anda, Francisco J. « Left–right model from gauge-Higgs unification with dark matter ». Modern Physics Letters A 30, no 12 (6 avril 2015) : 1550063. http://dx.doi.org/10.1142/s0217732315500637.

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We propose a five-dimensional model based on the idea of Gauge-Higgs Unification (GHU) with the gauge group SO(5) × U(1) in Randall–Sundrum (RS) spacetime. We obtain a left–right (LR) symmetric model with a stable scalar identified as a dark matter candidate. This stable scalar obtains a vacuum expectation value (VEV) that gives mass to fermions in the bulk through the Hosotani Mechanism. There is a scalar localized on a brane and gives contributions to fermion masses. This scalar fits the observed Higgs boson data. We are able to fit all the Standard Model (SM) observables while evading constraints.
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Soa, Dang Van, et Bui Thi Ha Giang. « The influence of the scalar unparticle on the W-pair production at ILC in the Randall–Sundrum model ». Modern Physics Letters A 35, no 25 (25 juin 2020) : 2050217. http://dx.doi.org/10.1142/s021773232050217x.

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An attempt is made to present the contribution of the scalar unparticle on some scattering processes in the Randall–Sundrum (RS) model. We have evaluated the contribution of the scalar unparticle on the W-pair production cross-sections at International Linear Colliders (ILC). The results indicate that at the low values of the scaling dimension and the bounds on scale [Formula: see text] are around few TeV, the cross-sections are much enhanced, which is quite comparable with the W-production in the Standard Model and hence it is worthwhile to explore in future colliders.
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CHO, Y. M., et I. P. NEUPANE. « WARPED BRANE-WORLD COMPACTIFICATION WITH GAUSS–BONNET TERM ». International Journal of Modern Physics A 18, no 15 (20 juin 2003) : 2703–27. http://dx.doi.org/10.1142/s0217751x03015106.

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In the Randall–Sundrum (RS) brane-world model a singular delta-function source is matched by the second derivative of the warp factor. So one should take possible curvature corrections in the effective action of the RS models in the Gauss–Bonnet (GB) form. We present a linearized treatment of gravity in the RS brane-world with the Gauss–Bonnet modifications to Einstein gravity. We give explicit expressions for the Neumann propagator in arbitrary D dimensions and show that a bulk GB term gives, along with a tower of Kaluza–Klein modes in the bulk, a massless graviton on the brane, as in the standard RS model. Moreover, a nontrivial GB coupling can allow a new branch of solutions with finite Planck scale and no naked bulk singularity, which might be useful to avoid some of the previously known "no-go theorems" for RS brane-world compactifications.
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Debnath, Partha Sarathi. « Observational constraints of emergent universe in brane-world with Gauss–Bonnet term and dissipative effect ». International Journal of Geometric Methods in Modern Physics 16, no 11 (novembre 2019) : 1950169. http://dx.doi.org/10.1142/s021988781950169x.

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Cosmological solutions in the Randall–Sundrum (RS) type II brane-world model including Gauss–Bonnet (GB) term, in the presence of a bulk viscous cosmological fluid are discussed. Transport equations described by Eckart and Israel Stewart are implemented here. Cosmological models admitting emergent universe (EU) of the early universe is explored here in the presence of imperfect fluid described by Eckart theory and Truncated Israel Stewart (TIS) theory and Full Israel Stewart (FIS) theory. We also study the permitted values of the EU model parameters by considering cosmological observational dataset. The stability analysis of the equilibrium points of the dynamical system associated with the evolution in the RS brane including GB term are studied in Eckart theory, TIS theory and FIS theory.
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