Planck 2013&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

Session

Parallel Session on LHC and DM

23 May 2013, 16:00

Bonn

Conveners

Parallel Session on LHC and DM

• Leszek Roszkowski

Parallel Session on LHC and DM

• Leszek Roszkowski

109. Naturalness of Light Neutralino Dark Matter

Yasutaka Takanishi

23/05/2013, 16:00

We (P. Grothaus, M. Lindner, Y. T.) investigate neutralino dark matter in the low-energy phenomenological minimal supersymmetric standard model taking account of the newest results from the Large Hadron Collider as well as all other experimental bounds from collider physics and the cosmological abundance. We find that near updates of direct searches signicantly rule out a large area of the...

110. Dark matter, singlet extensions of the nuMSM, and symmetries

Kyle Allison

23/05/2013, 16:20

The Lyman-alpha forest bound severely constrains the non-resonant production of warm dark matter in the nuMSM. It has been shown that an extension of the nuMSM by a Higgs singlet phi can provide a dark matter production mechanism through the decays of phi that readily satisfies or escapes the Lyman-alpha bound. I will discuss the astrophysical and cosmological constraints on such models and...

111. SUSY-QCD corrections to neutralino-stop co-annihilation

Quentin Le Boulc'h

23/05/2013, 16:40

We have computed the one-loop SUSY-QCD corrections for neutralino-stop coannihilation into electroweak gauge and Higgs bosons in the MSSM. I will show that these annihilation channels are phenomenologically relevant within the pMSSM, in particular in the light of the observation of the Higgs boson with a mass of about 126 GeV at the LHC. I will show numerical results for the cross sections and...

112. Higgs couplings after Moriond 2013

Beranger Dumont

23/05/2013, 17:00

Performing a fit to all publicly available data, we analyze the extent to which the latest results from the LHC and Tevatron constrain the couplings of the Higgs boson-like state at ~ 125 GeV, as well as invisible (or undetected) decays. This is based on arXiv:1212.5244 (to appear in JHEP) and G. Belanger, BD, U. Ellwanger, J. F. Gunion, S. Kraml, in preparation.

113. Higgs signal at the LHC for the 4D Composite Higgs Model

Daniele Barducci

23/05/2013, 17:20

General Composite Higgs models provide an elegant solution to the hierarchy problem present in the Standard Model (SM) and give an alternative pattern leading to the mechanism of electroweak symmetry breaking (EWSB). We present a recently proposed realistic realization of this general idea analyzing in detail the Higgs production and decay modes. Comparing them with the latest Large Hadron...

114. Constraints on models with universal extra dimensions from dilepton searches at the LHC

Lisa Edelhäuser

23/05/2013, 17:40

Models with universal extra dimensions predict that each Standard Model particle is accompanied by a tower of Kaluza-Klein resonances. Canonical searches for the production and cascade decays of first Kaluza-Klein modes through missing transverse momentum signatures suffer in general from low detection efficiencies because of the rather compressed Kaluza-Klein particle mass spectrum. We...

106. Non-Equilibrium Thermal Dark Matter

Bryan Zaldivar

23/05/2013, 18:00

Dark Matter (DM) may have been produced out of thermal equilibrium in the early universe. This possibility has been investigated before through the so-called "Freeze-in" scenario of Feebly-Interacting-Massive-Particles. In this talk I show that this is just a particular case of a general out-of-equilibrium-generated DM, by describing new alternatives which are totally different at a...

107. Interplay between Fermi gamma-ray lines and collider searches

Hyun Min Lee

23/05/2013, 18:30

We explore the interplay between lines in the gamma-ray spectrum and LHC searches involving missing energy and photons. As an example, we consider a singlet Dirac fermion dark matter with the mediator for Fermi gamma-ray line at 130 GeV. A new chiral or local U(1) symmetry makes weak-scale dark matter natural and provides the axion or Z' gauge boson as the mediator connecting between dark...

108. Two ultimate tests of constrained supersymmetry

Kamila Kowalska

23/05/2013, 19:00

The discovery of the Higgs boson at 126 GeV seems to imply masses in the multi-TeV regime for the simplest constrained SUSY models. Thus, with the exception of limited regions of the parameter space where stop mixing is large, in these scenarios the new physics might be out of reach even for the 14 TeV run. We discuss the prospects of using two alternative and complementary ways to explore the...