21-26 July 2014
Renold Building
Europe/London timezone
Formal SUSY and Strings
Place
Location: Renold Building
Date:
from 21 Jul 14:30 to 25 Jul 18:00
Conveners
-
21 Jul 14:30 - 15:50
- Prof. Antoniadis, Ignatios (CERN)
-
21 Jul 16:30 - 18:00
- Prof. Gray, James (Virginia Tech)
-
22 Jul 14:30 - 15:50
- Prof. Dudas, Emilian (CPHT)
-
22 Jul 16:30 - 18:00
- Prof. Anderson, Lara (Virginia Tech)
-
24 Jul 14:30 - 15:50
- Dr. Goodsell, Mark (LPTHE, UPMC)
-
25 Jul 14:30 - 15:50
- Prof. Konishi, Kenichi (University of Pisa and INFN, Pisa)
-
25 Jul 16:30 - 18:00
- Prof. Konishi, Kenichi (University of Pisa and INFN, Pisa)
Timetable | Contribution List
Displaying 28
contributions
out of
28
Although additional low scale U(1)s have been discussed extensively in SUSY GUTs and superstring models, having a viable light, extra U(1) in worldsheet heterotic string constructions has proven to be a challenge. Here, we present the construction of heterotic string models using the free fermionic formulation and focus on how viable U(1)s may arise. We motivate an example as an appealing propos
... More
Presented by Dr. Viraf MEHTA
on
25/07/2014
at
17:30
We study compactifications of heterotic string theory on manifolds satisfying the ddbar-lemma. We consider the Strominger system description of the low energy supergravity to first order in alpha' and show that the moduli of such compactifications are subspaces of familiar cohomology groups such as H^1(TX), H^1(TX*), H^1(End_0(V)) and H^1(End_0(TX)). These groups encode the complex structure, Kahl
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Presented by Prof. James GRAY
on
22/07/2014
at
17:10
Recently, it was found that the soft X-ray excess in the center of Coma can be explained by axion to photon conversion of a cosmic axion background (CAB). We extend this analysis to the outskirts of Coma, including regions up to 5 Mpc from the center of the cluster. We extract the soft X-ray flux from ROSAT All-Sky Survey data and compare it to the expected flux from axion to photon conversion of
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Presented by Mr. Markus RUMMEL
on
22/07/2014
at
15:30
We extend the classification of the free fermionic heterotic–string vacua to models in which the SO(10) GUT symmetry at the string scale is broken to the flipped SU(5) subgroup. In our classification method, the set of basis vectors defined by the boundary conditions which are assigned to the free fermions is fixed and the enumeration of the string vacua is obtained in terms of the Generalized G
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Presented by Mr. Hasan SONMEZ
on
21/07/2014
at
17:30
The most general supersymmetric theories involving eight supercharges can only be off-shell if one introduces an auxiliary manifold associated with the R-symmetry group. The resulting structure, which can be formulated either as projective or harmonic superspace, naturally provides a framework for constructing hypermultiplet actions both in flat space and in supergravity. I will discuss recent pro
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Presented by Dr. Daniel BUTTER
on
25/07/2014
at
15:30
Dark radiation is a compelling extension to $\Lambda$CDM: current experimental results hint at $\Delta N_{\rm eff} \gtrsim 0.5$, which is increased to $\Delta N_{\rm eff} \simeq 1$ if the recent BICEP2 results are included. In recent years dark radiation has been considered in the context of string theory models such as the LARGE Volume Scenario of type IIB string theory, forging a link between p
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Presented by Mr. Stephen ANGUS
on
22/07/2014
at
14:10
The non-commutativity of space-time has been proposed as an attempt to incorporate in quantum mechanics and quantum field theory some properties that should be part of a consistent quantum theory of gravitation. A non-trivial aspect of this type of proposal is
the fate of spacetime symmetries in this context. Some of the most popular versions for non-commutative spaces explicitly violate Lorentz
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Presented by Mr. Carlos IPIA
on
24/07/2014
at
13:50
I review the status of Seiberg like dualities in 2+1
dimensional N=2 gauge theories with unitary and real gauge groups and
fundamental and tensor representations. I discuss the role of
localization on the three sphere to support the dualities. RG flows
connecting diferrent dual pairs are analyzed.
Presented by Mr. Antonio AMARITI
on
21/07/2014
at
13:50
The longstanding problem of accessing F-theory on eight-dimensional manifolds of Spin(7) holonomy is addressed from an M-theory perspective. A novel version of the duality from M-theory to F-theory is proposed, in which M-theory on certain Spin(7) manifolds is dual to F-theory on the same geometries times an interval. The F-theory effective action is discussed by uplifting the M-theory effective a
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Presented by Mr. Federico BONETTI
on
21/07/2014
at
16:10
The Standard Model is gauge theory based on a particular gauge group and matter fields transforming under it. One possible explanation of its origin is given by string theory. In particular, F-theory describes gauge theory in geometric way and gives us good explanation on Grand Unified structure. Although many Grand Unification based on simple groups are suggested for simplicity, without intermedi
... More
Presented by Prof. Choi KANG-SIN
on
22/07/2014
at
13:30
Heterotic string compactifications based on Calabi-Yau manifolds and line bundle sums have led to a large number of phenomenologically promising models with precise MSSM spectra. I will discuss the structure of these models, phenomenological implications and some recent developments.
Presented by Prof. Andre LUKAS
on
22/07/2014
at
16:50
It has recently been realised that polystable, holomorphic sums of line bundles over smooth Calabi-Yau three-folds provide a fertile ground for heterotic model building. Large numbers of phenomenologically promising such models have been constructed for various classes of Calabi-Yau manifolds. I will briefly discuss the class of models based on complete intersections in products of projective spac
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Presented by Dr. Andrei CONSTANTIN
on
22/07/2014
at
16:30
The reduction of the 11 dimensional supergravity action on an elliptically fibered Calabi-Yau fourfold gives rise to an N=2 supersymmetric theory in 3 dimensions which is dual to a 4 dimensional N=1 F-theory reduction. We will consider how higher derivative corrections to the 11 dimensional action modify these effective theories. Our discussion of this will include an analysis of the effective act
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Presented by Dr. Tom PUGH
on
21/07/2014
at
15:50
I will consider supersymmetric gauge theories on a manifold with topology S^1 x S^3, allowing for a general class of metrics. I will present the exact computation of the partition function for these theories using localization of the path integral. The result reproduces the supersymmetric index, and includes a normalization factor that can be interpreted as a Casimir energy. The latter gives the l
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Presented by Dr. Davide CASSANI
on
21/07/2014
at
13:30
A peculiarity of M-theory when combined with gauge/gravity duality is that the free energy of the gauge theory on M2 and M5-branes follow a power law: N^{3/2} for M2, and N^3 for M5 when the number of branes N becomes large. This property has been considered mysterious for many years, but thanks to recent progress we now have a sound understanding and also semi-microscopic derivations of the scali
... More
Presented by Prof. Nakwoo KIM
on
21/07/2014
at
15:30
We propose a simple but effective mechanism to realize an
inflationary early universe consistent with the observed
WMAP, Planck and/or BICEP2 data which would be incorporated
in numerous particle physics models constructed in a
(effective) five-dimensional spacetime.
In our scenario, the inflaton field is identified with one of
the moduli appearing when the fifth direction is compactifi
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Presented by Mr. Hajime OTSUKA
on
25/07/2014
at
16:50
We discuss the large-distance approximation of the monopole-vortex complex soliton in a hierarchically broken gauge system, SU(N+1) \to SU(N) \to 1, in a color-flavor locked SU(N) symmetric vacuum. The ('t Hooft-Polyakov) monopole of the higher-mass-scale breaking appears as a point and acts as a source of the thin vortex generated by the lower-energy gauge symmetry breaking. The exact color-f
... More
Presented by Prof. Kenichi KONISHI
on
21/07/2014
at
14:10
We construct a natural supersymmetry breaking model, with light third generation squarks and small radiative corrections to the Higgs up soft mass, by identifying flavour gauge messengers with magnetic quark superfields of $\mathcal{N}=1$ Supersymmetric QCD. Although these models of flavour and supersymmetry breaking are strongly coupled, through Seiberg duality we have a calculable and predictive
... More
Presented by Dr. Moritz MCGARRIE
on
21/07/2014
at
14:30
In $N=1$ supergravity (SUGRA) supersymmetric (SUSY) and non-supersymmetric Minkowski vacua originating in the hidden
sector can be degenerate. This allows for consistent
implementation of the multiple point principle (MPP)
assumption. We present no--scale inspired SUGRA model
where the MPP assumption is realised at the tree--level
without extra fine-tuning. In the supersymmetric phase i
... More
Presented by Dr. Roman NEVZOROV
In this work, we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective superpotential in a supersymmetric model, and the impacts of this improved calculation in the dynamical symmetry breaking that happens in our model. We consider an N = 1 supersymmetric theory including an Abelian Chern-Simons supereld coupled to N scalar superelds in a
... More
Presented by Mr. Andres QUINTO
on
25/07/2014
at
15:10
The Background Field Method is a quantization procedure which preserves the gauge invariance of a theory in each intermediate step. It was introduced by DeWitt and others for 1-loop calculations. It was then extended for 2-loops by 'tHooft and improved by DeWitt, Boulware and Abbott [1]. In this work the method is applied to quantize the SUSY Yang-Mills-Chern-Simons N=1 model in the absence of mat
... More
Presented by Mr. Fabricio MARQUES
on
24/07/2014
at
14:10
We present a general analysis of soft SUSY breaking in fluxed Type IIB de Sitter string vacua with all moduli stabilized, focusing on models in which the MSSM is sequestered from the SUSY breaking sources and the spectrum of soft terms is hierarchically smaller than the gravitino mass
Presented by Dr. Luis APARICIO
on
22/07/2014
at
13:50
We explain how the spectral flow operator normally acting within a general (2,2) theory can be used as a map between (2,0) models. The space of (2,0) models is of particular interest among all heterotic-string models for two important reasons: i)N=1 spacetime SUSY requires (2,0) superconformal invariance and ii)models with the minimal SO(10) unification structure, which is well motivated by the St
... More
Presented by Mr. Panagiotis ATHANASOPOULOS
on
22/07/2014
at
16:30
We present new methods for supersymmetry breaking which rely on superspace higher derivatives. The theories under consideration have a deformed auxiliary field potential, thus admit more than one vacua. In the new vacua supersymmetry is broken. We also investigate the possible origin of these superspace higher derivatives.
Presented by Dr. Fotis FARAKOS
on
25/07/2014
at
14:50
I will first review recent advances in F-theory GUT model building, including the construction of globally well-defined compactification geometries, which realize additional U(1) symmetries, for instance to disallow proton decay operators, which are vital in building realistic models. I will then explain how to determine the complete set of possible U(1) charge patterns using Tate's algorithm.
Presented by Dr. Sakura SCHAFER-NAMEKI
on
25/07/2014
at
13:30
The simplest models of supersymmetry compatible with LHC searches typically require very significant tuning of the electroweak scale. However, the renormalisation flow of the visible sector soft masses can be significantly modified by the dynamics of the hidden sector. I will discuss ways in which this can modify conventional estimates of the fine tuning, and show that if the hidden sector runs th
... More
Presented by Edward HARDY
on
24/07/2014
at
13:30
We study one loop corrections to $N=\frac{1}{2}$ supersymmetric gauge theory. In order to show theory is renormalisable in the standard way, we redefine the gaugino and the auxiliary fields($\lambda, \bar F$) which results to extra terms of the lagrangian. We show these extra terms generated by field redefinitions are necessary for renormalisability of the
non-anti-commutative field
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Presented by Dr. Ahmad FARZANEH KORD
on
24/07/2014
at
14:30
Nonlinear representation of SUSY describing the geometric spontaneous SUSY breakdown fuses simply with gravity, which produces the nonlinear-supersymmetric general relativity theory(NLSUSYGR) of the Einstein-Hilbert type for NG-fermion and graviton before the Big Bang. The familiar standard model (M)SSM is reproduced in the true vacuum of NLSUSYGR as the composite theory of NG-fermion and continu
... More
Presented by Prof. Kazunari SHIMA
on
25/07/2014
at
17:10