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Top quark mass from CDF

Description: We report on the most recent measurements of the top quark mass in three decay channels, performed by the CDF Collaboration at the Tevatron collider. We combine these results to obtain a mass value of 176.0 #6; 6.5 GeV/ c 2.
Date: March 2, 1999
Creator: Yao, W.-M.
Partner: UNT Libraries Government Documents Department

Search for Scalar Top at CDF

Description: We report results of three searches for scalar top quark. Two of the searches look for direct production of scalar top quark followed by the decay of the scalar quark to charm quark and neutralino or bottom and chargino. The third search looks for top quark decaying to scalar top and neutralino followed by the decay of scalar top to bottom quark and neutralino. We find no evidence for the presence of scalar top quark in any of the searches. Therefore, depending on the search we set limits on the production cross-section, BR(t {yields} {tilde t}{sub 1} + {tilde {chi}}{sup 0}{sub 1}), or m{sub {tilde t}} vs. m{sub {tilde {chi}}{sup 0}{sub 1}}.
Date: May 11, 1999
Creator: Holck, C.
Partner: UNT Libraries Government Documents Department

Initial experience with the CDF layer 00 silicon detector

Description: We report on initial experience with the CDF Layer 00 Detector. Layer 00 is an innovative, low-mass, silicon detector installed in CDF during the upgrade for Run 2A of the Tevatron. Noise pickup present during operation at CDF is discussed. An event-by-event pedestal correction implemented by CDF is presented. This off-line solution prevents L00 from being used in the current incarnation of the on-line displaced track trigger. Preliminary performance of Layer 00 is described.
Date: March 17, 2003
Creator: Hill, C.
Partner: UNT Libraries Government Documents Department

Status of the CDF Run II Silicon Detector

Description: A snapshot of the status of the CDF Run II Silicon Detector is presented, with a summary of commissioning issues since the start of Run II, current performance of the detector, and the use of the data in both the trigger and offline reconstruction.
Date: April 10, 2003
Creator: Nahn, S.
Partner: UNT Libraries Government Documents Department

CDF Run II status and prospects

Description: Run II at the Tevatron Collider started at the beginning of March 2001. With extensive upgrades on both detectors and electronics the CDF II began to collect data. This paper reviews early Run II physics results obtained by analyzing data collected before the middle of June 2002. At the present the understanding of the detector performances is rather high so many analysis are already underway.
Date: February 6, 2003
Creator: Pagliarone, C.
Partner: UNT Libraries Government Documents Department

B physics at CDF

Description: B physics is at the core of the CDF agenda for Run II. With the Tevatron performance gradually improving, samples of data corresponding to about 70 pb{sup -1} are now available. Due to improved detector capabilities these data already allow one to improve a number of Run I results, as well as perform a series of new measurements. We present an overview of the current state of B physics at CDF.
Date: June 4, 2003
Creator: Anikeev, K.
Partner: UNT Libraries Government Documents Department

Strangeness production in minimum-bias events at CDF

Description: In a recently published paper 1 are emphasized, for the soft subsample extracted from the minimum-bias (MB) dataset of p{bar p} collisions, interesting invariances with the c.m. energy of the charged multiplicity and p{sub T} distributions. We present an analogous study on V{sup 0} production.
Date: January 15, 2003
Creator: Moggi, N.
Partner: UNT Libraries Government Documents Department

The Ssart of Run II at CDF

Description: After a hiatus of almost 6 years and an extensive upgrade, Tevatron, the world largest proton-antiproton collider, has resumed the operation for the so called RUN II. In this paper we give a brief overview of the many new features of the Tevatron complex and of the upgraded CDF experiment, and show the presently achieved detector performances as well as highlights of the RUN II physics program in the beauty and electroweak sector.
Date: October 29, 2002
Creator: Rescigno, Marco
Partner: UNT Libraries Government Documents Department

Rare b decays from the CDF experiment

Description: The high cross-section for the production of b quarks at the Tevatron hadron collider make it an ideal place to search for rare B meson species and very low branching fraction decay modes of the more common B mesons. This paper reports the recent discovery of the Bc meson by the CDF collaboration. It also discusses the observation of rare B meson final states involving {psi}(2S) mesons and searches for ultra-rare decays such as B {yields} {mu}{sup +}{mu}{sup -}
Date: October 1, 1998
Creator: Trischuk, W.
Partner: UNT Libraries Government Documents Department

Top quark mass and production from CDF

Description: We present the latest results about the top quark obtained by the CDF experiment using a data sample of about 110 pb{sup -1} collected at the Fermilab Tevatron collider. We briefly describe the production cross section determination and the top mass measurement. Finally we review the search for the top quark in rare decay channels and the first direct calculation of the CKM matrix element V{sub tb}.
Date: September 1, 1997
Creator: Leone, S.
Partner: UNT Libraries Government Documents Department

Searches for beyond the MSSM phenomena at CDF

Description: CDF searches for R{sub p} violation, extra quark generations, and long-lived charged massive particles are presented. These phenomena are not predicted by the Minimal Supersymmetric Standard Model (MSSM) and therefore complement the classic SUSY searches. Prospects for continuing these analyses during Run II of the Tevatron are outlined.
Date: April 13, 1999
Creator: Chertok, M.
Partner: UNT Libraries Government Documents Department

CDF: Run II Physics Projections

Description: In March 2001, the Fermilab Tevatron will start a new physics run of p{bar p} collisions at {radical}s = 2.0 TeV. The CDF experiments will collect a data sample of 2 fb{sup {minus}1} in the first two years. In this paper the authors describe the B physics prospects at CDF during the upcoming run.
Date: December 20, 2000
Creator: Tanaka, Maashi
Partner: UNT Libraries Government Documents Department

Status of CDF Run II Upgrade

Description: For the past several years, the CDF collaboration has been upgrading its detector to accommodate the higher luminosity and beam energy expected during Run II (2001-2006) at the Tevatron p{bar p} collider. Accelerator improvements include increasing the instantaneous luminosity by an order of magnitude with respect to Run I to 2 x 10{sup 32} cm{sup {minus}2} s{sup {minus}1} and increasing the center of mass energy from 1.8 TeV to 2.0 TeV. The detector upgrades include replacing the entire tracking volume, extending the muon coverage, adding a time of flight system, and improving the selection capabilities of the trigger. The partially instrumented detector underwent a commissioning run during September/October 2000 in preparation for starting data taking in Spring 2001 with the full detector. Now that Run II has been extended through 2006, we expect to collect an integrated luminosity of 2 fb{sup {minus}1} during the first two years of running and up to a total of 15 fb{sup {minus}1} by the end of Run II.
Date: December 20, 2000
Creator: Cranshaw, Jack
Partner: UNT Libraries Government Documents Department

A study of jet energy measurement at CDF

Description: This thesis describes the effort being made to improve the Jet Energy Reconstruction as performed by the CDF international collaboration at the Tevatron collider. This experiment studies proton-antiproton interactions at a center of mass energy of 1.8 TeV. During the three years data taking period Run 1, from 1992 to 1995 the CDF experiment collected an amount of data corresponding to a total integrated luminosity of 110 pb{sup -1}. One of the major results obtained analyzing this data sample is the discovery of the top quark. In the year 2000 a new period of data taking, Run 11, will start with a higher luminosity and a slightly higher center of mass energy giving us the chance to explore high energy physics even deeper. In preparation of this new run several upgrades are being made to adapt the CDF detector to the high luminosity foreseen and to improve its capabilities. Many signatures requested to trigger the detector aim at signaling a quark or a gluon in the final state. Unfortunately we are not able to measure quarks as free particles because they undergo a fragmentation process when turning into jets of particles. Thus it is of key importance to build up algorithms which reconstruct the energy of the initial parton starting from the jet informations. The description of the algorithm adopted till now will be given as an introduction to the new method being developed, that will be the main subject of this thesis. In Chapter I we will give a theoretical introduction on strong interactions to describe the mechanism to produce hadronic jets. In Chapter 2 we will describe some results from the experiment where the reconstruction of hadronic jets was important. Here we will also mention some important results which we think we can obtain during new the data ...
Date: September 1, 1998
Partner: UNT Libraries Government Documents Department

Top Quark Production and Decay Measurements from CDF

Description: The CDF collaboration is completing a number of studies on the top quark, based on samples collected during Run I of the Tevatron Collider. The production and decay properties of the top quark are being examined in most of the t {anti t} decay channels, and many of these results have recently been published. The study of the top quark has moved beyond measurements of its mass and production cross section, to detailed studies of W polarization in top decays, single top production, branching fractions, the W - t - b coupling, and search for rare decays.
Date: January 1, 1999
Creator: Tollefson, K.
Partner: UNT Libraries Government Documents Department