Conveners
Parallel Session 1: D - SUSY pheno
- Sven Heinemeyer (IFCA (CSIC, Santander))
Parallel Session 1: E - Alternatives
- Yang Bai (SLAC)
Parallel Session 1: A - Collider pheno
- Bogdan Dobrescu ()
Parallel Session 1: F - Dark matter
- Marcela Carena (Fermilab)
Parallel Session 1: C - SUSY theory
- Patrick Fox ()
Parallel Session 1: B - String pheno
- Mirjam Cvetic ()
Prof.
Hsin-Chia Cheng
(University of California, Davis)
28/08/2011, 11:15
SUSY: phenomenology
Events with missing transverse energies in hadron collisions are an important channel for searching new physics which contains a dark matter candidate, such as supersymmetry with R-parity conservation. Due to the missing information, reconstructing these events are challenging. I will discuss some recent developments of kinematic variables and techniques which are useful in discoveries and...
Prof.
Xerxes Tata
(University of Hawaii)
28/08/2011, 11:15
We describe work-in-progress that attempts to extract model-independent
information about neutralino properties from LHC data, assuming only the
particle content of the MSSM, that all two-body neutralino decays are
kinematically forbidden and that neutralino inclusive production has a
sufficient cross section. We show that the Lorentz invariant dilepton
mass distribution, which will be...
Stefano Di Chiara
(CP3-Origins, Southern Denmark University)
28/08/2011, 11:15
In this talk, I will briefly review the mechanism of dynamical electroweak symmetry breaking, and show that a class of models that feature a supersymmetric UV completion and use this mechanism can produce a viable mass spectrum with no fine tuning. I will then present an explicit supersymmetric UV complete technicolor model able to pass the precision tests while producing a phenomenologically...
Dr
Anibal Medina
(UC Davis)
28/08/2011, 11:15
I will discuss the viability of the KK-radion in Warped Universal Extra Dimensional models as a DM candidate in the context of thermal and non-thermal production in the early universe. In the thermal case, the KK-radion can account for the observed DM density when the radion decay constant is in the
natural multi-TeV range. The effects of coannihilation with the first KK excitation of the RH...
Dylan Albrecht
(The College of William and Mary)
28/08/2011, 11:35
I will discuss pion condensation in a hard-wall holographic model of hadrons with isospin chemical potential. The pions condense at a critical value of the chemical potential. If the scalar mode is not included in the effective theory, then the transition from the hadronic phase to the pion condensate phase is generically first order, unlike in chiral perturbation theory. I will explain this...
Charlotte Hellmann
(Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen)
28/08/2011, 11:35
The Sommerfeld enhancement effect has been studied in dark matter
annihilations in the present universe as a means to boost the dark
matter annihilation cross section. It has also been applied to relic
abundance calculations in the MSSM with the neutralino LSP as dark
matter candidate, where however the enhancement effect is milder
due to the larger relative velocities of the annihilating...
Dr
Matthew Buckley
(Fermilab)
28/08/2011, 11:45
SUSY: phenomenology
I propose a new technique for determining the spin of new massive particles that might be discovered at the Large Hadron Collider. The method relies on pair-production of the new particles in a kinematic regime where the vector boson fusion production mechanism is enhanced. For this regime, I show that the distribution of the leading jets as a function of their relative azimuthal angle can be...
Dr
Lara Anderson
(University of Pennsylvania)
28/08/2011, 11:45
In this talk I will present recent work on systematic approaches to realistic particle physics in string theory. Using new techniques in computational algebraic geometry we are able to scan literally hundreds of billions of string vacua. A detailed study of the corresponding physical theories with broadly desirable physical characteristics – such as anomaly-free theories, Standard Model...
Ms
Claudia Frugiuele
(Carleton University)
28/08/2011, 11:45
I will talk about a new R symmetric SUSY model where the R symmetry is identified with one of the lepton number, and as consequence the sneutrino plays the role of the down type Higgs.
This is possible as the sneutrino does not carry any lepton number, and therefore the sneutrino VEV is not constrained by the usual tight bounds from the neutrino mass.
On the other hand, all the other SUSY...
Dr
Stefania Gori
(University of Chicago)
28/08/2011, 11:45
We discuss the generation of the Mu-term in a class of supersymmetric models characterized by a low energy effective superpotential containing a Lambda S H1 H2 term with a large coupling Lambda. In particular we discuss a specific example where the superpotential has no dimensionful parameters, pointing out the relation between the generated Mu-term and the mass of the lightest Higgs boson. We...
Mr
Don Bunk
(Syracuse University)
28/08/2011, 11:55
We study the low-energy effects of a 4 fermion operator in a 5-dimensional
space-time with a single compactified extra dimension. Quantum effects due to
fermion loops renormalize the theory, and lead to dynamical scalar degrees of
freedom which can be considered to be bound states of 5-dimensional fermions.
For critical values of the 4-fermion coupling, these bound states can condense,...
Mr
Kunal Kumar
(Northwestern University)
28/08/2011, 11:55
We explore a scenario in which Magnetic inelastic Dark Matter can scatter to a tower of heavier states.The splitting between successive states is assumed to be a constant $\delta \sim\mathcal{O}$(keV). Such a spectrum with small mass splittings can arise naturally in an extradimensional model with a large compactification radius. We find that a region of parameter space corresponding to...
Dr
Mathew McCaskey
(University of Kansas)
28/08/2011, 12:10
SUSY: phenomenology
We present a method to resolve combinatorial issues in multi-particle final state at hadron colliders. The use of kinematic variables such as MT2 and invariant masses significantly reduces combinatorial ambiguities in signal but at a cost of losing statistics. We illustrate the idea with a pair of gluinos which leads to 4-jets + E̸ T signal, and apply the same idea to the t-tbar dilepton...
Alejandro de la Puente
(University of Notre Dame/Fermilab)
28/08/2011, 12:10
We study an extension of the Higgs sector of the Minimal Supersymmetric Standard Model (MSSM) in which effects of new degrees of freedom at the TeV scale are considered, allowing for sources of CP violation beyond those of the MSSM (BMSSM).
We analyze the impact of these new sources of CP violation in Higgs Collider Phenomenology, identifying signatures that are not realized either in the...
Dr
Sogee Spinner
(University of Wisconsin Madison)
28/08/2011, 12:10
Extending the MSSM by two new abelian symmetries allows for the understanding of both the size of the mu-term and the lack of baryon violating operators that would destabilize the proton. Many interesting phenomenological points ensue including a Z' that couples only to the third generation and exotic colored triplets which could lead to visible baryon number violation at the LHC.
Mr
Natsumi Nagata
(Nagoya university)
28/08/2011, 12:15
In the anomaly-mediated supersymmetry (SUSY) breaking scenario, neutral gaugino of SU(2)_L multiplet, Wino, can be the lightest SUSY particle and become a candidate for dark matter. We calculated scattering cross section of Wino dark matter with nucleon, which is responsible for direct detection of the dark matter, on the assumption that the SUSY particles and the heavier Higgs bosons have...
Mr
Alvise Varagnolo
(IFAE, Barcelona)
28/08/2011, 12:15
We have investigated grand unified theories in scenarios where EW symmetry breaking is triggered by a composite Higgs (accompanied by a composite top), building minimal consistent models that can survive EW Precision Tests with reasonable fine tuning and that predict new exotic states. We have also analysed the signatures of these global symmetry partners of the Higgs and the top at hadron colliders.
Dr
Motohiko Kusakabe
(Institute for Cosmic Ray Research, University of Tokyo)
28/08/2011, 12:35
When the baryon density parameter determined from WMAP-7 data is used, the standard Big Bang Nucleosynthesis (BBN) model predicts primordial 7Li abundance a factor of about three larger than abundance levels inferred from observations of metal-poor halo stars. This discrepancy can be the most prominent problem of standard BBN (SBBN) model, and might originate from exotic particle and nuclear...
Mr
Chien-Yi Chen
(Carnegie Mellon University)
28/08/2011, 12:35
Alternatives to SUSY: phenomenology
Once new heavy particles are discovered at the Large Hadron Collider (LHC), determination of the properties of these particles, such as masses, spins and couplings, is important to distinguish major scenarios of TeV scale new physics. However, new physics processes with missing energy in the final state are challenging to analyze at the LHC since they offer only few kinematical handles. In...
Mr
James Halverson
(University of Pennsylvania)
28/08/2011, 12:35
MSSM-like quiver gauge theories naturally arise in D-brane compactifications and make up a subset of the data necessary to fully specify a string vacuum of this type. In addition to requiring field theoretic anomaly cancellation, consistency of the string theory requires that the chiral spectrum of a quiver satisfy additional constraints not present in field theory, rendering many quivers with...
Mr
Toshifumi Yamada
(Sokendai, KEK)
28/08/2011, 12:35
In the bulk matter Randall-Sundrum (RS) model, matter fields reside in the bulk of 5D warped spacetime and the Higgs field on the IR brane. Fields of 1st and 2nd generation matter particles are localized towards the UV brane while those of 3rd generation towards the IR brane, so that the hierarchical structure of Yukawa couplings arises geometrically, without hierarchy in fundamental...