May 31, 2011
Wilson Hall
US/Central timezone
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Contribution List

Displaying 29 contributions out of 29
Session: Session 3
International Services is researching the process by which people adapt to living and working at Fermilab, with focus on psychological processes known as Culture Shock and "transition shock". The goal is to develop systems and resources to emphasize enjoyable aspects and minimize stressful aspects. International Services is confirming anecdotal data about adapting to Fermilab, and exploring pos ... More
Presented by HALEY PSCHIRRER on 31 May 2011 at 1:40 PM
Session: Session 4
Track: Intensity Frontier
MINOS is a long-baseline neutrino oscillation experiment utilizing the NuMI neutrino beam from Fermilab. Although not designed for atmospheric neutrino analyses, the uniqueness of the MINOS magnetized detector enables neutrino induced muon charge discrimination and the measurement of the charge asymmetry due to matter effects as a function of zenith angle and neutrino energy. The oscillation proba ... More
Presented by XINJIE QIU on 31 May 2011 at 4:20 PM
Session: Session 4
Track: Intensity Frontier: MINERvA
I will talk about new reconstruction algorithm that is based on a medical CT scan image reconstruction to reconstruct electron shower event in MINERvA detector.
Presented by JAEWON PARK on 31 May 2011 at 4:55 PM
Session: Session 4
Track: Intensity Frontier: MINERvA
We present recent anti-neutrino Quasi-Elastic scattering results in the few GeV region. Data was taken with the MINERvA detector in the NuMI beam at Fermilab. We discuss sample selection and show data and simulation comparisons.
Presented by JESSE CHVOJKA on 31 May 2011 at 4:40 PM
Session: Session 4
Track: Intensity Frontier: MINERvA
MINERvA experiment is running since the last year and the first analysis are taking place. In this presentation I show the candidate event formation from our data and the tools that manage the readout dead time. Both of them are very important in the reconstruction stage.
Presented by LEONIDAS ALIAGA SOPLIN on 31 May 2011 at 5:40 PM
Session: Session 3
Track: Cosmic Frontier
In this presentation, we describe a study of ten strong gravitational lenses. A gravitational lens is a mass distribution which causes the deflection of light from a more distant astronomical source, sometimes forming a ring or an arc visible in space. In this case, all of the lenses are clusters of galaxies. These lensing systems were discovered in the Sloan Digital Sky Survey by the Sloan Bri ... More
Presented by MATTHEW WIESNER on 31 May 2011 at 1:50 PM
Session: Session 3
Track: Cosmic Frontier
DM-Ice is a new direct detection dark matter experiment planned for deployment deep in the South Pole ice underneath the IceCube Neutrino Telescope. This detector will consist of approximately 250-kg of NaI(Tl) scintillating crystals and will have sensitivity to testing the expected annual modulation in the dark matter signal. Following the results of DAMA/LIBRA and preliminary findings of ... More
Presented by WALTER PETTUS on 31 May 2011 at 2:10 PM
Session: Session 2
Track: Energy Frontier
A summary of electroweak results from the CMS Collaboration is given. The inclusive cross sections have been measured to better than 2% with a 4% luminosity uncertainty. The rate of jet production in association with W and Z bosons has been extensively studied and includes a test of Berends-Giele scaling. The W polarization in unpolarized pp collisions has been observed. Measurements of the W ... More
Presented by MICHELE DE GRUTTOLA on 31 May 2011 at 11:20 AM
Session: Session 4
Track: Intensity Frontier: MINERvA
Ideas how to reconstruct charge current Pi zero production in the Minerva Experiment.
Presented by JOSE PALOMINO GALLO on 31 May 2011 at 5:10 PM
Session: Session 1
Presented by Zeynep ISVAN on 31 May 2011 at 7:55 AM
Session: Session 4
Track: Intensity Frontier
Liquid Argon Time Projection Chambers (LArTPC) are being developed to study the neutrino sector because of their sensitivity and scalability. In a LArTPC, light detection information is used in conjunction with a wire chamber to reconstruct charged particle paths. MicroBooNE is a LArTPC being built at Fermilab to measure neutrino cross-sections in liquid argon and investigate the low-energy excess ... More
Presented by TESS SMIDT on 31 May 2011 at 4:00 PM
Session: Session 1
Track: Energy Frontier
We use an unbinned likelihood fit, as used in previous precision top quark mass measurements, with events from lepton + jet top quark decays where the lepton has been identified as a hadronically decaying tau. We use ppbar collisions at 1.96 TeV at CDF. Events require a single lepton identified as a hadronic tau, missing Et, and 4 jets of which at least one must be tagged as a b jet. The likelihoo ... More
Presented by DARYL HARE on 31 May 2011 at 8:20 AM
Session: Session 1
Track: Energy Frontier
We present a model-independent measurement of t-channel electroweak production of single top quarks in ppbar collisions at center of mass energy of 1.96 TeV. Using 5.4 fb^−1 of integrated luminosity collected by the D0 detector at the Fermilab Tevatron Collider, and selecting events containing an isolated electron or muon, missing transverse energy and one or two jets originating from the fragme ... More
Presented by JYOTI JOSHI on 31 May 2011 at 9:00 AM
Session: Session 1
Track: Energy Frontier
We present a measurement of the b-tagging efficiency using 32pb-1 of data collected in 2010 with the CMS detector operating at the proton-proton LHC with sqrt(s)=7 TeV. The measurement is based on data samples that have a least two reconstructed jets and a non-isolated muon close to one of the jets. The measurements are made as a function of the jet pT and eta. Results are presented for diffe ... More
Presented by SAMVEL KHALATYAN on 31 May 2011 at 9:20 AM
Session: Session 1
Track: Energy Frontier
Recently two measurements of the correlation between the spin of the top quark and antiquark have been performed at D0. In the {ttbar -> W+bW-bbar ->l+nubl-nub} final states we select about 300 ttbar pairs, corresponding to an integrated luminosity of 5.4 fb^-1. In the first analysis the correlation is extracted from the angles of the two leptons in the t and tbar rest frames, yielding a corr ... More
Presented by TIM HEAD on 31 May 2011 at 8:40 AM
Session: Session 1
Track: Energy Frontier: Higgs Physics
An overview of a search for the Higgs boson in the H \rightarrow \tau\tauハdecay channel in data collected with CDF detector at the Tevatron collider is presented. To fully explore the discovery potential of this channel sophisticated methods are required for identification and energy measurements of tau leptons decaying hadronically as well as the for accurate reconstruction of the mass of \tau\ ... More
Presented by ANDEY ELAGIN on 31 May 2011 at 10:10 AM
Session: Session 2
Track: Energy Frontier
The Heavy Quark Expansion theory predicts that the ratio among the B^0 and B_s lifetime to be very close to 1. The B^0 lifetime has been measured with a precision around 1%, so having a precision measurement of Bs lifetime can be a test of this framework. I will describe a method to measure the Bs lifetime using the semileptonic channel $B^{0}_s\rightarrow D^{+}_s\mu X$ with data collected by the ... More
Presented by JORGE MARTINEZ ORTEGA on 31 May 2011 at 12:20 PM
Session: Session 3
Track: Intensity Frontier
The proposed Mu2e experiment aims to search for neutrino-less muon to electron conversion with sensitivity improved by three orders of magnitude relative to previous experiments. To achieve this goal, Mu2e needs to obtain a cosmic ray veto efficiency of better than 99.9%. We report the preliminary results of recent R&D efforts for three-layer plastic scintillator veto system. The results are ... More
Presented by YURI OKSUZIAN on 31 May 2011 at 3:10 PM
Session: Session 2
Track: Energy Frontier
We present a search for anomalous production of events containing a W or Z boson and additional leptons. The search uses data corresponding to $5.1$ $\mathrm{fb}^{-1}$ of integrated luminosity from $p\bar{p}$ collisions at a center-of-mass energy of $\sqrt{s}=1.96$ TeV. We find no indications of non-standard-model phenomena. Limits are set for a dark-matter inspired model of supersymmetric dark ... More
Presented by SCOTT WILBUR on 31 May 2011 at 11:40 AM
Session: Session 2
Track: Energy Frontier
We present searches for a massive quark (t') decaying to Wq and separately Wb, thus mimicking the top quark decay signature in data collected by the CDF II detector corresponding to 5.6 fb^-1. We use the reconstructed mass of the t' quark and the scalar sum of the transverse energies in the event to discriminate possible new physics from Standard Model processes, and set limits on a standard 4th g ... More
Presented by DAVID COX on 31 May 2011 at 12:00 PM
Session: Session 1
Track: Energy Frontier: Higgs Physics
We present a search for Standard Model Higgs boson (h) production in pp-bar collisions at a center-of-mass energy of 1.96 TeV. for this analysis, we use the data collected with the CDF II detector. We consider h decays into two W bosons of which one decays into a lepton plus a neutrino and another decays into two jets. This is the dominant decay mode for h mass larger than 135 GeV. This decay mode ... More
Presented by YUJI SUDO on 31 May 2011 at 9:55 AM
Session: Session 1
Track: Energy Frontier: Higgs Physics
We present a search for the Standard Model Higgs boson produced in association with a $Z$ boson in the $\ell^+\ell^-b\bar{b}$ $(\ell=e,\mu)$ final state using the CDF detector. The latest iteration of this analysis has benefited from several improvements, including multivariate lepton identification, the inclusion of additional triggers based on missing transverse energy, and the addition of exp ... More
Presented by JUSTIN PILOT on 31 May 2011 at 10:25 AM
Session: Session 1
Track: Energy Frontier: Higgs Physics
We present a search for the Standard Model Higgs boson produced in association with a W boson in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. We search a dataset corresponding to an integrated luminosity of 5.7 fb-1. The analysis uses the channel where the Higgs boson decays to a bottom-antibottom quark pair and the W boson decays leptonically. Therefore, we select events c ... More
Presented by ADRIAN BUZATU on 31 May 2011 at 9:40 AM
Session: Session 2
Track: Energy Frontier
We are searching the Higgs boson associated with a vector boson by using like-sign dilepton events. In these events, the most dominant backgrounds are fake events. As collecting the data, we found that the nominal W veto causes some bias in the fake ratios. Also, pT only background predictions are not sufficient because fakes depend on other variables and result in poor predictions. In this confe ... More
Presented by DAISUKE YAMATO on 31 May 2011 at 11:00 AM
Session: Session 3
Track: Cosmic Frontier
Neu-Rad is an experiment to investigate the recently observed variations in isotope decay rates correlated with the earth-sun distance and solar flares. Isotope decay rates will be observed near high flux neutrino sources with energies similar to what is observed from the sun such as the nuclear reactor facility in Rio De Janerio, Brasil. Isotope decay rates will also be measured at the undergrou ... More
Presented by Ms. Martina CANCELO on 31 May 2011 at 3:30 PM
Session: Session 1
Track: Energy Frontier
The CDF Silicon Vertex Detector plays a critical role in most analyses at CDF, including searches for the Higgs boson, new physics signatures, measurements of Bs-mixing, top quark and W boson masses. Originally designed to withstand up to 3 1/fb, its life has spanned over 11 1/fb of integrated delivered luminosity with surprisingly good performance. In this talk we will present details of detector ... More
Presented by MIGUEL MONDRAGON on 31 May 2011 at 8:00 AM
Session: Session 3
Track: Intensity Frontier
ArgoNeuT, a 170 liter Liquid Argon Time Projection Chamber (LArTPC) neutrino detector, recently collected thousands of neutrino events in the NuMI beam line at Fermilab. After a brief introduction to the experiment, progress on the reconstruction and analysis will be discussed. Candidate neutrino events and future LArTPC experiments will also be presented.
Presented by ELLEN KLEIN on 31 May 2011 at 2:50 PM
Session: Session 3
Track: Cosmic Frontier
The primordial abundances of light elements form an important evidence of the Big Bang Model of the universe. With precise measurements of the baryon-to-photon ratio, η from WMAP, these final abundances, which are functions of η alone in general, are fixed and must be consistent. As a result, any discrepancy between the theoretical and observational abundances of these elements, as exists for li ... More
Presented by NACHIKETA CHAKRABORTY on 31 May 2011 at 2:30 PM
Session: Session 4
Track: Intensity Frontier: MINERvA
Tagging michel electrons in Minerva
Presented by DUN ZHANG on 31 May 2011 at 5:25 PM