Bulletin of the American Physical Society
Joint Fall 2011 Meeting of the Texas Sections of the APS, AAPT, and Zone 13 of the SPS
Volume 56, Number 7
Thursday–Saturday, October 6–8, 2011; Commerce, Texas
Session L3: High Energy Physics III |
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Chair: Pavel Nadolsky, Southern Methodist University Room: Sam Rayburn Center Second Floor, Room Traditions |
Saturday, October 8, 2011 9:25AM - 9:37AM |
L3.00001: On the correlation of extra MSSM Higgs to stringent flat directions in heterotic string theory Jared Greenwald It has been proposed that the number of extra copies of MSSM Higgs, as found in heterotically derived string GUT models, may be correlated to the existence and multiplicity of all-order stringent flat directions. We consider a handful of these GUT models and show that, even with a small number of MSSM Higgs, one can find all possibilities of flatness or lack thereof. Specifically, we present three flipped SU(5) and an SO(10) model and report on their respective D and F-flatness. We will report on each of the models' observable and hidden gauge content as well. Additionally, we comment on the possible relationship between flat direction phenomenology and moduli stabilization. [Preview Abstract] |
Saturday, October 8, 2011 9:37AM - 9:49AM |
L3.00002: LUX Dark Matter Search Experiment Rachel Mannino The Large Underground Xenon (LUX) dark matter search experiment is a two-phase xenon time-projection chamber (TPC) which is positioned to be the most sensitive dark matter detector once it is deployed underground in the fall 2012. I will discuss the design, construction, and current status of the detector as it is being commissioned on the surface and readied for a science run. [Preview Abstract] |
Saturday, October 8, 2011 9:49AM - 10:01AM |
L3.00003: Constraints on the gluon PDF from inclusive jet production Zhihua Liang We studied how well we can constraint the gluon Parton Distribution Function(PDF) with the LHC data, and we will present an fixed order(s) jet event caculation program for this research. This code is based on the EKS codes, together with the Cuba Library, ROOT system and fastJet. [Preview Abstract] |
Saturday, October 8, 2011 10:01AM - 10:13AM |
L3.00004: Measuring low energy quenching factors for nuclear recoils in NaI(Tl) Tyana Stiegler, James White, Robert Webb An investigation of the low energy nuclear recoil response of NaI(Tl) will be discussed. The experiment uses low energy neutrons produced via the Li(p,n) reaction and utilizes a high light output NaI(Tl) crystal. The goal is to improve on published measurements at energies relevant to DAMA/LIBRA and other low-mass WIMP experiments. The experimental design and setup, shielding optimization, neutron beam calibration techniques and preliminary results will be included. [Preview Abstract] |
Saturday, October 8, 2011 10:13AM - 10:25AM |
L3.00005: Bc absorption cross sections by pions M.A.K. Lodhi, Faisal Akram, Shaheen Irfan, Sonaina Undleeb The cross sections of Bc absorption by mesons are calculated using hadronic Lagrangian based on SU(5) flavor symmetry by imposing the gauge symmetry. The coupling constants are preferably determined empirically using vector meson dominance (VMD) model, heavy quark symmetries or QCD sum rules. Calculated cross sections are found to be in range 2 to 7 mb and 0.2 to 2 mb for the processes and respectively, when the monopole form factor is included. It is noted that the cross section estimates are highly dependent on the choice of form factor and the value of cut off parameter aside from the values of coupling constants used. These results could be useful in calculating production rate of meson in relativistic heavy ion collisions. [Preview Abstract] |
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