Bulletin of the American Physical Society
2008 Joint Fall Meeting of the Texas and Four Corners Sections of APS, AAPT, and Zones 13 and 16 of SPS, and the Societies of Hispanic & Black Physicists
Volume 53, Number 11
Friday–Saturday, October 17–18, 2008; El Paso, Texas
Session H5: High Energy Physics: Experimental |
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Chair: Jorge Lopez, The University of Texas at El Paso Room: Union East, 3rd Floor Elkins |
Saturday, October 18, 2008 10:30AM - 10:42AM |
H5.00001: CMS Computing at TTU and the Search for New Physics at the LHC Vanalet Rusuriye, Sung-Won Lee, Alan Sill, Chiyoung Jeong With the success of the first circulation of proton beams on the Large Hadron Collider (LHC) at CERN on September 10$^{th}$, the world's largest particle accelerator, LHC, is on track to explore the nature of our universe. This presentation will focus on the LHC-CMS computing efforts being made to prepare for CMS physics analysis, simulation, and commissioning at Texas Tech University. Currently, TTU operates a CMS Tier-3 center that is fully capable of being used for the full range of CMS Projects. Various TTU-Tier-3 activities (data transfer, processing, storage) will be discussed, including the development of remote Data quality Monitoring System. We will also present preliminary results on the search for the Standard Model Higgs boson through the Weak Boson Fusion process, on the basis of Monte Carlo data. [Preview Abstract] |
Saturday, October 18, 2008 10:42AM - 10:54AM |
H5.00002: Cosmology in the Focus Point Region at the Large Hadron Collider Abram Krislock, Bhaskar Dutta, Will Flanagan, Alfredo Gurrola, Teruki Kamon, Nikolay Kolev, Mike VanDyke In the focus point region of supersymmetric parameter space, all of the scalar supersymmetric particles are very heavy. Thus, they are not able to contribute to the early universe annihilation processes of the lightest neutralino, the dark matter candidate in this model. Only the charginos and neutralinos can contribute to such annihilations, which determine the relic density of dark matter. In supersymmetry, the masses of charginos and neutralinos depend only on the model parameters $\mu$, $\mathrm{tan}(\beta)$, and $m_{1/2}$. This talk will focus on determining these three parameters and the dark matter content from neutralino and chargino mass measurements at the LHC. Also, the method for propagating the uncertainties of such determinations to the uncertainty in the relic density will also be discussed. [Preview Abstract] |
Saturday, October 18, 2008 10:54AM - 11:06AM |
H5.00003: Measurements of Neutralino/Chargino Masses in the Focus Point Region at the LHC Will Flanagan, Teruki Kamon, Bhaskar Dutta, Alfredo Gurrola, Nikolay Kolev, Michael VanDyke, Abram Krislock We present a systematic study of the dark matter allowed focus point region in the minimal supergravity (mSUGRA) model and the possibility of measurement of the dark matter content at the LHC. As part of this study, I will present both results and methodology for all neutralino and chargino mass measurements at the LHC. We will look at both the uncertainty and possibility of systematic errors in techniques such as looking for the dilepton edges in these decay modes. These measurements of neutralino and chargino masses at the LHC allow us to solve for the necessary model parameters which we can use to predict the dark matter relic density. This study can be applied to any other model for the focus point region. [Preview Abstract] |
Saturday, October 18, 2008 11:06AM - 11:18AM |
H5.00004: Gluino Mass Reconstruction in the Focus Point Region at the LHC Michael VanDyke, Will Flanagan, Alfredo Gurrola, Abram Krislock, Nikolay Kolev, Teruki Kamon, Bhaskar Dutta The focus point region of the minimal supergravity (mSUGRA) motivated model at the LHC is characterized by gluino pair production with multi-jet and multi-lepton final states. In particular, the final states with top quark and W boson will be the primary focus. In this talk, I will discuss the detection of W boson and top quark using di-jet and three jet analysis. Finally, I will show the reconstruction of the gluino mass from the final states. [Preview Abstract] |
Saturday, October 18, 2008 11:18AM - 11:30AM |
H5.00005: Cavity Technology that will increase the power and reduce the cost of ILC Nathaniel Pogue, Peter McIntyre, Akhdiyor Sattarov Current SRF cavity technology has made the construction of the ILC prohibitively expense. Through several different methods it is possible to increase the power and reduce the cost. This upgrade is the result of work performed in various labs around the country: Jeff Lab, Argonne Lab, and Texas A{\&}M University. Using the technique of superconducting heterostructures it is possible to increase both the gradient and Q of SRF cavities. Such layers can be effectively created using ALD technology. These films can be tested using a specially designed cavity to go four times the BCS limit of Niobium. In combination with the layer newly invented heating techniques can increase cavity performance by reducing trapped vortices. The Polyhedral cavity can eliminate the costly HOM couplers and piezos to compensate for Lorentz detuning. All of these methods in combination could drastically reduce the cost and increase performance of a large linear collider. [Preview Abstract] |
Saturday, October 18, 2008 11:30AM - 11:42AM |
H5.00006: Quality Assurance Test Setup for MPPCs used by the P0D in the T2K Experiment Daniel Ruterbories, Bruce Berger, Norm Buchanan, Ben Gookin, David Warner, Robert Wilson The PiZero sub-detector (P0D) of the T2K off-axis near detector will utilize novel silicon-based photo-sensors, multi-pixel photon counters (MPPCs), from Hamamatsu for readout of all of its 10,400 channels. Prior to use in the P0D each MPPC must be examined as part of a rigorous quality assurance program. This presentation will describe the MPPC quality assurance procedure undertaken at Colorado State University. An overview of the operation of the MPPCs under various bias voltages is given. In addition, the performance of the detectors with various light intensities is presented. [Preview Abstract] |
Saturday, October 18, 2008 11:42AM - 11:54AM |
H5.00007: Status of the CMS HCAL and Performance on the First Beam at the LHC Sung-Won Lee We present the current status of the CMS Hadron Calorimeter (HCAL) performance in preparation for the Large Hadron Collider (LHC) operations at CERN. The CMS HCAL is being commissioned in the underground cavern using cosmic rays together with magnet to test installation procedure and to commissioning of hardware and software, including DAQ and online monitoring system. We also present the performance of the CMS HCAL in the first LHC beams. [Preview Abstract] |
Saturday, October 18, 2008 11:54AM - 12:06PM |
H5.00008: TBD Zafar Yasin |
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