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

Session

Parallel Session on LHC

21 May 2013, 14:00

Bonn

Conveners

Parallel Session on LHC

• Jamie Tattersall

Parallel Session on LHC

• Jamie Tattersall

66. Light RPV stops hiding in the LHC data

Riccardo Torre

21/05/2013, 14:00

I will discuss the 8 TeV LHC reach on pair produced heavy flavored di-jet resonances. Motivated by theories of R-parity violation in supersymmetry I will concentrate on a final state with two b-jets and two light jets. I will exploit b-tagging to reject the background and discuss its importance at the trigger level to probe light stops. I will also present kinematical selections that can be...

67. Light stops emerging in WW cross section measurements?

Krzysztof Rolbiecki

21/05/2013, 14:30

Recent ATLAS and CMS measurements show a slight excess in the WW cross section measurement. While still consistent with the Standard Model within 1-2 sigma, the excess could be also a first hint of physics beyond the Standard Model. We argue that this effect could be attributed to the production of scalar top quarks within supersymmetric models. The stops of mass ~200 GeV has the right cross...

58. Top and bottom partner production in composite Higgs models at the LHC

Jose Santiago

21/05/2013, 15:00

Natural composite Higgs models predict light top and bottom partners, vector-like quarks that mix strongly with the top and bottom quarks. We describe the strategy to discover them and the Large Hadron Collider and their use to explore further aspects of models of strong electroweak symmetry breaking.

68. Spin-1 resonances as a signature of composite Higgs at the LHC

Anna Kaminska

21/05/2013, 16:00

This talk will focus on the consequences of electroweak symmetry breaking by strong dynamics, assuming the existence of a light composite scalar appearing as a pseudo- Goldstone boson of some global symmetry of the new strongly interacting sector. In such a scenario, the composite scalar has properties very similar to the Standard Model Higgs, but the existence of additional resonances with...

69. Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC

Antonio Racioppi

21/05/2013, 16:20

We analyze the impact of effective axial-vector coupling of the gluon on spin polarization observables in $t\bar{t}$ pair production at the LHC (arXiv:1212.3272, to appear on PRD). Working at leading order in QCD, we compute the $t\bar{t}$ spin-correlation and left-right spin asymmetry coefficients in the helicity basis in the laboratory frame as functions of the new physics scale $\Lambda$...

70. The MSSM at the end of LHC Phase 1 - status report

Enrico Maria Sessolo

21/05/2013, 16:40

The discovery of the Higgs boson at 126 GeV seems to imply masses in the multi-TeV regime for the simplest constrained SUSY models. Such a heavy supersymmetric spectrum is somewhat at odds with the naturalness criterion. Moreover, in such a framework it is impossible to obtain the correct value of $(g-2)_\mu$. By construction, SUSY models with light sleptons and light third generation squarks...

71. Using top polarization for improving third generation squark searches

Suchita Kulkarni

21/05/2013, 17:00

If supersymmetry is the solution to the Higgs mass hierarchy problem, this requires the existence of light stops and sbottoms. The current reach of the experimental searches for stops and sbottoms at the LHC is however still limited. In this work, we exploit the information about top polarization in sbottom (and stop) decays into tops, in order to gain better control over the signals arising...

72. Supersymmetric Parameter Determination at the LHC using a Neural Network

Nicki Bornhauser

21/05/2013, 17:20

Finding signs of new physics and even knowing the underlying theory does not automatically come along with the knowledge of the model parameters. In most new physics theories the relation mapping the measured observables onto the model parameters is unknown. In this talk the ability of a neural network is demonstrated to find this unknown relation in parameter space. As example different...

73. Probing dynamical electroweak symmetry breaking with cosmic rays

Dennis D. Dietrich

21/05/2013, 17:40

The energies attained by cosmic rays offer an opportunity for probing the mechanism for dynamical electroweak symmetry breaking directly. In this talk we will discuss which signals are expected to be observed in air showers in the presence of such mechanisms.