Bulletin of the American Physical Society
Annual Meeting of the APS Four Corners Section
Volume 60, Number 11
Friday–Saturday, October 16–17, 2015; Tempe, Arizona
Session I7: Particle Physics IV |
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Chair: Stephen Pate, New Mexico State University Room: PSF173 |
Saturday, October 17, 2015 11:00AM - 11:24AM |
I7.00001: Future Colliders Invited Speaker: Shufang Su With the discovery of the Higgs boson at the Large Hadron Collider, fundamental physics finds itself at one of the most exciting crossroads in its history. In this talk, I will discuss the remaining problems in particle physics after the Higgs discovery. I will explore several options for future colliders that are proposed worldwide and the physics potential of those future machines. [Preview Abstract] |
Saturday, October 17, 2015 11:24AM - 11:36AM |
I7.00002: The third generation squark search at the 14 TeV LHC Huanian Zhang In the search for top/bottom squark (stop/sbottom) in SUSY at the LHC, the common practice has been to assume a $100\%$ decay branching fraction for a given search channel. In realistic MSSM scenarios of a Bino-like LSP with light Wino or Higgsino next-to-LSPs (NLSPs), there are often more than one significant decay modes to be present, which significantly weaken the current sbottom search limits at the LHC. On the other hand, the combination of the multiple decay modes offers alternative discovery channels for sbottom searches. In this talk, I will present the decay patterns of stop and sbottom for some realistic MSSM scenarios, and the search sensitivity at the 14 TeV LHC with 300 ${\rm fb}^{-1}$ integrated luminosity. For the stop/sbottom pair production at the 14 TeV LHC, we find that the third generation squark can be discovered up to 1050 GeV at 5 $\sigma$ significance, or excluded up to 1200 GeV if there is no SUSY signal over Standard Model backgrounds being found. [Preview Abstract] |
Saturday, October 17, 2015 11:36AM - 11:48AM |
I7.00003: Compton scattering: from deeply virtual to quasi-real Yao Ji, Andrei Belitsky, Dieter Müller We address the question of interpolation of the virtual Compton scattering process off a polarized nucleon target between the deeply virtual regime for the initial-state photon and its near on-shell kinematics making use of the photon helicity-dependent Compton Form Factors (CFFs) as a main ingredient of the formalism. We suggest a simple parametrization of the Compton hadronic tensor in terms of CFFs which are free from kinematical singularities and are directly related, at large photon virtualities, to Generalized Parton Distributions. We also provide a relation of our basis spanned by a minimal number of Dirac bilinears to the one introduced by Tarrach for the parametrization of the virtual Compton tensor and utilize the former to establish a set of equalities among our CFFs and Generalized Polarizabilities. As a complementary result, we express Compton scattering in the Born approximation in terms of CFFs as well. [Preview Abstract] |
Saturday, October 17, 2015 11:48AM - 12:00PM |
I7.00004: Measuring the Temperature Dependence of the Radiation Tolerance of Electronics John Cumalat, Ben Bentele, David Christian, Michael Krohn, Steve Wagner The need for highly radiation tolerant electronics is critical in the era of running experiments at the CERN Large Hadron Collider. In a collaboration between the University of Colorado and the Fermilab ASIC group, we report the results of a 1 Grad irradiation of 65nm CMOS transistors performed in the Gamma Irradiation Facility (GIF) at Sandia National Laboratory. We describe the facility, the vortex tube cooling technique, and our experimental setup. Our measurements show significant radiation damage, but the damage is less severe as the temperature is reduced. [Preview Abstract] |
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