Conveners
Formal
- Angel Uranga (I)
Formal
- Angel Uranga (I)
Prof.
Nihat Deger
(Bogazici University)
29/05/2014, 14:30
String Theory
Parallel Session talk
We determine the most general form of off-shell N=(1,1) supergravity field configurations in three dimensions by requiring that at least one off-shell Killing spinor exists. We then impose the field equations of the topologically massive off-shell supergravity and find a class of solutions whose properties crucially depend on the norm of the auxiliary vector field. These are spacelike-squashed...
Mr
Eirik Eik Svanes
(University of Oxford)
29/05/2014, 14:50
String Theory
Parallel Session talk
I will consider heterotic supergravity compactified to four dimensions at first order in alpha', commonly known as the Strominger System. I will show how the system can be put in terms of a generalised bundle over the base manifold. This bundle is holomorphic if and only if the Bianchi Identities for the curvatures and the NS-field-strength H are satisfied. I will consider infinitesimal...
Andrei Constantin
(University of Oxford)
29/05/2014, 15:10
String Theory
Parallel Session talk
Based on: arXiv:1307.4787, arXiv:1311.1941 and arXiv:1202.1757.
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. We discuss the class of models...
Dr
Lukas Witkowski
(Heidelberg University)
29/05/2014, 15:30
String Theory
Parallel Session talk
The existence of Dark Radiation is a generic prediction of the Large Volume Scenario (LVS), a popular scheme of moduli stabilisation in type IIB string theory. Consequently, measurements of the amount of Dark Radiation put stringent constraints on models based on the LVS.
In this talk I will quantify predictions for Dark Radiation for a wide range of LVS models. In particular, I will show...
Stephen Angus
(University of Oxford)
29/05/2014, 15:50
String Theory
Parallel Session talk
Dark radiation is a compelling extension to $\Lambda$CDM: current experimental results hint at $\Delta N_{\rm eff} \simeq 0.5$, 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...
Hui Luo
(Istituto Nazionale di Fisica Nucleare Sezione di Padova)
29/05/2014, 16:40
Formal BSM
Parallel Session talk
We introduce a $N=1$ supergravity model with a very simple hidden sector coupled to the electroweak gauge and Higgs sectors of the MSSM. At the classical level, supersymmetry and $SU(2) \times U(1)$ are both spontaneously broken, with vanishing vacuum energy. Two real flat directions control the two symmetry-breaking scales $m_{3/2}$ and $m_Z$. The two massless scalars are a gauge singlet and...
Ms
Irene Valenzuela
(IFT UAM/CSIC)
29/05/2014, 17:00
Formal BSM
Parallel Session talk
We consider a scheme in which SUSY is broken at a large scale $M_{SS}$ well above the electroweak scale $M_{EW}$, such that it does not provide a solution to the hierarchy problem but rather stabilizes the SM vacuum. Under standard unification assumptions, we compute the Higgs mass as a function of the SUSY breaking scale, obtaining for $M_{SS}\geq 10^{10}$ GeV a very constrained result: $m_H...
Mr
Keigo Sumita
(Waseda Universary)
29/05/2014, 17:20
String Theory
Parallel Session talk
In a previous work [1], we constructed a phenomenological model based on the 10D Supersymmetric Yang-Mills theory with magnetic fluxes in extra dimensional space. We compactified the 10D SYM theory on three factorizable tori and introduced the magnetic fluxes preserving only the 4D N=1 SUSY. The magnetic fluxes originate the complicated flavor structures of the standard model, gauge...
Koji Ishiwata
(DESY)
29/05/2014, 17:40
SuSy and other BSM phenomenology
Parallel Session talk
We study a scenario for baryogenesis in modular cosmology and discuss its implications for the moduli stabilization mechanism and the supersymmetry (SUSY) breaking scale. If moduli fields dominate the Universe and decay into the standard model particles through diatonic couplings, the right amount of baryon asymmetry can be generated through CP violating decay of gluino into quark and squark...
