Miguel Mondragon
31/05/2011, 08:00
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...
Daryl Hare
31/05/2011, 08:20
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...
Jyoti Joshi
31/05/2011, 09:00
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...
Samvel Khalatyan
31/05/2011, 09:20
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...
Adrian Buzatu
(Higgs mini-session)
31/05/2011, 09:40
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...
Yuji Sudo
31/05/2011, 09:55
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...
Andey Elagin
31/05/2011, 10:10
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...
Justin Pilot
31/05/2011, 10:25
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...
Daisuke Yamato
31/05/2011, 11:00
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...
Michele de Gruttola
31/05/2011, 11:20
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...
Scott Wilbur
31/05/2011, 11:40
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...
Jorge Martinez Ortega
31/05/2011, 12:20
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...
Matthew Wiesner
31/05/2011, 13:50
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...
Walter Pettus
31/05/2011, 14:10
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...
Nachiketa Chakraborty
31/05/2011, 14:30
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...
Ellen Klein
31/05/2011, 14:50
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.
Yuri Oksuzian
31/05/2011, 15:10
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...
Ms
Martina Cancelo
(Batavia High School)
31/05/2011, 15:30
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...
Tess Smidt
31/05/2011, 16:00
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...
Xinjie Qiu
31/05/2011, 16:20
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...
Jesse Chvojka
31/05/2011, 16:40
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.
Jaewon Park
31/05/2011, 16:55
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.
Jose Palomino Gallo
31/05/2011, 17:10
Intensity Frontier: MINERvA
Ideas how to reconstruct charge current Pi zero production in the Minerva Experiment.
Leonidas Aliaga Soplin
31/05/2011, 17:40
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.