### Conveners

#### SUSY/String Models

- Ralph Blumenhagen ()

#### SUSY/String Models

- Ralph Blumenhagen ()

#### SUSY/String Models

- Gordon Kane (University of Michigan)

#### SUSY/String Models

- Gordon Kane (University of Michigan)

#### SUSY/String Models

- Fernando Quevedo (The Abdus Salam International Centre for Theoretical Physics)

#### SUSY/String Models

- Fernando Quevedo (The Abdus Salam International Centre for Theoretical Physics)

Jessica Goodman
(The Ohio State University)

24/08/2015, 14:30

SUSY/String Models

In this work we calculate important one loop SUSY-breaking parameters in models with Dirac gauginos, which are implied by the existence of heavy messenger fields. We find that these SUSY-breaking effects are all related by a small number of parameters, thus the general theory is tightly predictive. In order to make the most accurate analyses of one loop effects, we introduce calculations...

Dr
Soumya Rao
(University of Adelaide)

24/08/2015, 14:50

SUSY/String Models

We perform a comprehensive study of SU(5), SO(10) and E(6) supersymmetric GUT models where the gaugino masses are generated through the F-term breaking vacuum expectation values of the non-singlet scalar fields. In these models the gauginos are non-universal at the GUT scale unlike in the mSUGRA scenario. We discuss the properties of the LSP which is stable and a viable candidate for cold...

Mr
Raymond Co
(University of California, Berkeley)

24/08/2015, 15:10

SUSY/String Models

We are developing a simple supersymmetric axion theory by extending the MSSM with a gauge singlet axion field and right-handed neutrinos. To our surprise, this simple model has been overlooked in the literature, while models that introduce more singlet fields are intensively studied. In addition to the Peccei-Quinn solution to the strong CP problem, the achievements of our model are as...

Bibhushan Shakya
(MCTP)

24/08/2015, 15:30

SUSY/String Models

Obtaining light active neutrino masses as well as phenomenologically interesting (keV-GeV) sterile neutrino masses without any unnaturally small parameters hints at a new symmetry in the neutrino sector that is broken at the PeV scale, presumably tied to supersymmetry breaking. This framework can also explain the recently observed PeV energy neutrinos at IceCube and the 3.5 keV X-ray line.

Nathan Papapietro
(npapapietro@crimson.ua.edu)

24/08/2015, 16:30

SUSY/String Models

We propose a new variation to the SUSY Left-Right model (LRM) by extending the Minimal B-L model. Starting from energies of s√>7 TeV, we can describe an intermediate scale for Grand Unification along the Pati-Salam path from SO(10). Here the breaking of SU(2)L×SU(2)R×U(1)B−L→SU(2)L×U(1)Y is by a doublet rather than a triplet. Analyzing the RGE equations, the right handed neutral component of...

Antonio Morais
(Lund University and Aveiro University)

24/08/2015, 16:50

SUSY/String Models

We present a new supersymmetric (SUSY) and non-SUSY versions of a Grand Unified Theory based upon the trinification gauge group ($SU(3)_L\otimes SU(3)_R \otimes SU(3)_C$) and global flavour $SU(3)_F$ symmetry. In contrast to previous realizations of trinification models, the proposed SUSY version automatically provides unification of the Yukawa couplings as well as Higgs-lepton unification by...

Volodymyr Takhistov
(University of California, Irvine)

25/08/2015, 14:30

SUSY/String Models

With LHC not observing superpartners,
minimal supersymmetric versions of the Standard Model (SM) are very constrained.
We consider supersymmetric extensions of the SM in which the
usual R or matter parity gets replaced by another R or non–R discrete symmetry
that explains the observed longevity of the nucleon and solves the µ problem of
MSSM. Such R-parity violating scenarios may lead to...

Prof.
Bumseok Kyae
(Pusan National University)

25/08/2015, 14:50

SUSY/String Models

We employ both the minimal gravity- and the minimal gauge mediations of supersymmetry breaking at the grand unified theory (GUT) scale in a single supergravity framework,
assuming the gaugino masses are generated dominantly by the minimal gauge mediation effects.
In such a "minimal mixed mediation model,"
a "focus point" of the soft Higgs mass parameter, m_{h_u}^2 emerges
at 3-4 TeV...

John Kehayias
(Vanderbilt University)

25/08/2015, 15:10

SUSY/String Models

We present a common solution to the puzzles of the light Higgs or quark masses and the need for a shift symmetry and large field values in high scale inflation. One way to protect, for example, the Higgs from a large supersymmetric mass term is if it is the Nambu-Goldstone boson (NGB) of a nonlinear sigma model (NLSM). However, it is well known that NLSMs with nontrivial Kähler transformations...

Hiroyuki Abe
(Waseda University)

25/08/2015, 15:30

SUSY/String Models

We show some aspects of dynamical supersymmetry breaking (DSB) in super-Yang-Mills (SYM) theories in higher-dimensional space-time compactified on magnetized tori. The profile of background magnetic fluxes and Wilson-lines determines the breaking pattern of gauge symmetries as well as the number (degeneracy) of matter zero-modes in each representation under the remaining symmetries, with which...

Dylan Harries
(University of Adelaide)

25/08/2015, 16:30

SUSY/String Models

Non-minimal supersymmetric models are able to solve some of the naturalness
problems of the minimal supersymmetric standard model (MSSM), such as the need
for large radiative corrections to accommodate a 125 GeV Higgs. Models with an
additional $U(1)'$ symmetry at low energies may raise the tree level Higgs
mass through $F$- and $D$-term contributions, reducing the need for...

Zheng Sun
(Sichuan University)

25/08/2015, 16:50

SUSY/String Models

We show that in a class of gauge mediation models with tree level R-symmetry breaking, where supersymmetry and R-symmetries are broken by different fields, the gaugino mass either vanishes or finds contribution from loop level R-symmetry breaking. Thus tree-level R-symmetry breaking is either no-go or redundant for phenomenology model building. Attempts to overcome the no-go are discussed.

marcos cardoso rodriguez
(universidade federal rural do rio de janeiro)

25/08/2015, 17:10

SUSY/String Models

We build the complete supersymmetric version of a $SU(3)_{C}\otimes
SU(2)_{L}\otimes U(1)_{Y^{\prime}}\otimes U(1)_{B-L}$, where $B$ and $L$
are the usual baryonic and leptonic numbers, gauge model
($SUSY321 Y^{\prime}(B-L)$) with total lepton number $L=+1$ using the superfield formalism. This
model is interesting because generate masses for all neutrinos; there is good candidate to Dark...

Kin-Wang Ng
(Academia Sinica)

25/08/2015, 17:30

SUSY/String Models

We discuss the flat directions in the context of split supersymmetry, including the effects of supergravity. The discovered shift symmetry along certain flat directions may have implications to the inflation model and the baryon asymmetry of the Universe.

james gray
(Virginia Tech)

27/08/2015, 14:00

I will give a brief summary of the status of the heterotic approach to string phenomenology. I will begin by giving a broad-brush overview of what has and has not been achieved in this field. I will then describe two recent pieces of work on smooth heterotic compactifications to indicate the type of progress which is currently being made.

Todd Garon
(UW-Madison)

27/08/2015, 14:30

SUSY/String Models

We consider the phenomenology of deflected mirage mediation, a "mixed" supersymmetry breaking scenario motivated by string compactifications in light of results from LHC8, PLANCK, and LUX. In this scenario, there are additional gauge mediation contributions along with the standard gravity and anomaly mediation contributions of the KKLT-motivated mirage mediation scenarios, which drastically...

Dr
Yue Zhao
(Stanford)

27/08/2015, 14:50

SUSY/String Models

We propose a solution to (little) hierarchy problem based on SUSY breaking induced in asymmetric Chern-Simons theory. In such theory superparticles are lifted while standard model particles remain untouched. It starts with supergravity in $AdS_n$, where n can be 3,4,5. One can further take flat spacetime limit for $AdS_3$ or $AdS_4$, or one can study RS model in $AdS_5$.
In AdS space, the...

Harold Steinacker
(University of Vienna)

27/08/2015, 15:10

SUSY/String Models

We discuss the low-energy physics which arises on stacks of squashed brane solutions of SU(M) N=4 SYM, deformed by a cubic soft SUSY breaking potential. A brane configuration is found which leads to a low-energy physics similar to the standard model in the broken phase, assuming suitable VEV's of the scalar zero modes. Due to the triple self-intersection of the (fuzzy) branes, the matter...

Rob Knoops
(KU Leuven (BE))

27/08/2015, 16:30

SUSY/String Models

We explore the phenomenology of a supergravity theory based on a gauged R-symmetry.
The model contains a chiral multiplet S, which can be the string dilaton or a compactification modulus, that has a gauged shift symmetry.
Supersymmetry is then broken by a combination of F-term and D-term breaking, and allows for a tunable (parametrically small and positive) cosmological constant.
We...

Mr
Andres Quinto
(Universidade Federal do ABC)

27/08/2015, 16:50

SUSY/String Models

In this work, we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective superpotential in a supersymmetric model with an arbitrary parameter of gauge and, the impact of this improved calculation in the study of dynamical symmetry breaking. We consider an $\mathcal{N}=1$ supersymmetric theory, including an Abelian Chern-Simons...