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Using Drell Yan To Probe The Underlying Event In Run Ii At Collider Detector At Fermilab Cdf
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Book Synopsis Using Drell-Yan to Probe the Underlying Event in Run II at Collider Detector at Fermilab (CDF) by : Deepak Kar
Download or read book Using Drell-Yan to Probe the Underlying Event in Run II at Collider Detector at Fermilab (CDF) written by Deepak Kar and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: We study the behavior of charged particles produced in association with Drell-Yan lepton-pairs in the region of the Z-boson in proton-antiproton collisions at 1.96 TeV. We use the direction of the Z-boson in each event to define 'toward', 'away', and 'transverse' regions. For Drell-Yan production (excluding the leptons) both the 'toward' and 'transverse' regions are very sensitive to the 'underlying event', which is defined as everything except the two hard scattered components. The data are corrected to the particle level and are then compared with several PYTHIA models (with multiple parton interactions) and HERWIG (without multiple parton interactions) at the particle level (i.e. generator level). The data are also compared with a previous analysis on the behavior of the 'underlying event' in high transverse momentum jet production. The goal is to produce data that can be used by the theorists to tune and improve the QCD Monte-Carlo models of the 'underlying event' that are used to simulate hadron-hadron collisions.
Book Synopsis Using Drell-Yan to Probe the Underlying Event in Run II at Collider Detector at Fermilab (CDF). by :
Download or read book Using Drell-Yan to Probe the Underlying Event in Run II at Collider Detector at Fermilab (CDF). written by and published by . This book was released on 2008 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the behavior of charged particles produced in association with Drell-Yan lepton-pairs in the region of the Z-boson in proton-antiproton collisions at 1.96 TeV. We use the direction of the Z-boson in each event to define 'toward', 'away', and 'transverse' regions. For Drell-Yan production (excluding the leptons) both the 'toward' and 'transverse' regions are very sensitive to the 'underlying event', which is defined as everything except the two hard scattered components. The data are corrected to the particle level and are then compared with several PYTHIA models (with multiple parton interactions) and HERWIG (without multiple parton interactions) at the particle level (i.e. generator level). The data are also compared with a previous analysis on the behavior of the 'underlying event' in high transverse momentum jet production. The goal is to produce data that can be used by the theorists to tune and improve the QCD Monte-Carlo models of the 'underlying event' that are used to simulate hadron-hadron collisions.
Book Synopsis Multiple Parton Interactions at the LHC by : Paolo Bartalini
Download or read book Multiple Parton Interactions at the LHC written by Paolo Bartalini and published by World Scientific Publishing. This book was released on 2018-11-08 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many high-energy collider experiments (including the current Large Hadron Collider at CERN) involve the collision of hadrons. Hadrons are composite particles consisting of partons (quarks and gluons), and this means that in any hadron–hadron collision there will typically be multiple collisions of the constituents — i.e. multiple parton interactions (MPI). Understanding the nature of the MPI is important in terms of searching for new physics in the products of the scatters, and also in its own right to gain a greater understanding of hadron structure. This book aims at providing a pedagogical introduction and a comprehensive review of different research lines linked by an involvement of MPI phenomena. It is written by pioneers as well as young leading scientists, and reviews both experimental findings and theoretical developments, discussing also the remaining open issues.
Book Synopsis Underlying Event Studies at ATLAS and CDF. by :
Download or read book Underlying Event Studies at ATLAS and CDF. written by and published by . This book was released on 2011 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improving our understanding and modeling of the underlying event in high energy collider environment is important for more precise measurements at the LHC. CDF Run II data for the underlying event associated with Drell-Yan lepton pair production and early ATLAS data measuring underlying event activity with respect to the leading transverse momentum track are presented. The data are compared with several QCD Monte Carlo models. It is seen that no current standard Monte Carlo tune adequately describes all the early ATLAS data and CDF data simultaneously. The underlying event observables presented here are particularly important for constraining the energy evolution of multiple parton interaction models. One of the goals of these analyses is to provide data that can be used to test and improve MC models for current and future physics studies at the LHC. The underlying event observables presented here are particularly important for constraining the energy evolution of multiple partonic interaction models, since the plateau heights of the underlying event profiles are highly correlated to multiple parton interaction activity. The data at 7 TeV are crucial for MC tuning, since measurements are needed with at least two energies to constrain the energy evolution of MPI activity. PYTHIA tune A and tune AW do a good job in describing the CDF data on the underlying-event observables for leading jet and Drell-Yan events, respectively, although the agreement between predictions and data is not perfect. The leading-jet data show slightly more activity in the underlying event than PYTHIA Tune A, although they are very similar - which may indicate the universality of underlying event modeling. However, all pre-LHC MC models predict less activity in the transverse region (i.e in the underlying event) than is actually observed in ATLAS leading track data, for both center-of-mass energies. There is therefore no current standard MC tune which adequately describes all the early ATLAS data. However, using diffraction-limited minimum bias distributions and the plateau of the underlying event distributions presented here, ATLAS has developed a new PYTHIA tune AMBT1 (ATLAS Minimum Bias Tune 1) and a new HERWIG+ JIMMY tune AUET1 (ATLAS Underlying Event Tune 1) which model the p{sub T} and charged multiplicity spectra significantly better than the pre-LHC tunes of those generators. It is critical to have sensible underlying event models containing our best physical knowledge and intuition, tuned to all relevant available data.
Book Synopsis Single Event Effects and Their Mitigation for the Collider Detector at Fermilab by : Richard J. Tesarek
Download or read book Single Event Effects and Their Mitigation for the Collider Detector at Fermilab written by Richard J. Tesarek and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present an overview of radiation induced failures and operational experiences from the Collider Detector at Fermilab (CDF). In our summary, we examine single event effects (SEE) in electronics located in and around the detector. We present results of experiments to identify the sources and composition of the radiation and steps to reduce the rate of SEEs in our electronics. Our studies have led to a better, more complete understanding of the radiation environment in a modern hadron collider experiment.
Book Synopsis A Measurement of Low-mass Drell-Yan Production at the Collider Detector at Fermilab by : Andrew Ferrell Scott
Download or read book A Measurement of Low-mass Drell-Yan Production at the Collider Detector at Fermilab written by Andrew Ferrell Scott and published by . This book was released on 2000 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agriculture written by and published by . This book was released on 1910 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The CDF Computing and Analysis System by :
Download or read book The CDF Computing and Analysis System written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Collider Detector at Fermilab (CDF) collaboration records and analyses proton anti-proton interactions with a center-of-mass energy of 2 TeV at the Tevatron. A new collider run, Run II, of the Tevatron started in April. During its more than two year duration the CDF experiment expects to record about 1 PetaByte of data. With its multi-purpose detector and center-of-mass energy at the frontier, the experimental program is large and versatile. The over 500 scientists of CDF will engage in searches for new particles, like the Higgs boson or supersymmetric particles, precision measurement of electroweak parameters, like the mass of the W boson, measurement of top quark parameters, and a large spectrum of B physics. The experiment has taken data and analyzed them in previous runs. For Run II, however, the computing model was changed to incorporate new methodologies, the file format switched, and both data handling and analysis system redesigned to cope with the increased demands. This paper (4-036 at Chep 2001) gives an overview of the CDF Run II compute system with emphasis on areas where the current system does not match initial estimates and projections. For the data handling and analysis system a more detailed description is given.
Book Synopsis CDF - Run II Status and Prospects by :
Download or read book CDF - Run II Status and Prospects written by and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: After a five year upgrade period, the CDF detector located at the Fermilab Tevatron Collider is back in operation taking high quality data with all subsystems functional. We report on the status of the CDF experiment in Run II and discuss the start-up of the Tevatron accelerator. First physics results from CDF are presented. We also discuss the prospects for B physics in RunII, in particular the measurements of B{sub S}° flavour oscillations and CP violation in B decays.
Book Synopsis Stare ruske Ikone iz zbirke drzavne Tretjakovske Galerije, Narodni Muzej Beograd by :
Download or read book Stare ruske Ikone iz zbirke drzavne Tretjakovske Galerije, Narodni Muzej Beograd written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Large Extra Dimensions with Diphoton Events at CDF [i.e. Collider Detector at Fermilab] by : Simona Murgia
Download or read book Search for Large Extra Dimensions with Diphoton Events at CDF [i.e. Collider Detector at Fermilab] written by Simona Murgia and published by . This book was released on 2002 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Underlying Event Sensitive Observables in Drell-Yan Production Using GENEVA by : Simone Alioli
Download or read book Underlying Event Sensitive Observables in Drell-Yan Production Using GENEVA written by Simone Alioli and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Beauty Results from CDF and the Run-II Upgrades by :
Download or read book Recent Beauty Results from CDF and the Run-II Upgrades written by and published by . This book was released on 1996 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports on the most recent results from the Collider Detector Facility (CDF) from 110 pb−1 of data taken at the Fermilab Tevatron from 1992 to 1995. Improved measurements of B meson spectroscopy, lifetimes, and searches for new particle states are presented. Evidence for the effectiveness of same side tagging techniques in the context of mixing measurements is shown with applicability for CP violation studies in Run-II explained. The planned upgrades of importance to {ital b} physics for Run-II are briefly detailed with an emphasis on the expected physics reach in Run-II by CDF.
Book Synopsis Update of Run 1 B Results at CDF by :
Download or read book Update of Run 1 B Results at CDF written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: While the Collider Detector at Fermilab (CDF) is starting a new data run, it is also finishing analyses based on the 100 pb−1 ''Run 1'' data sample collected between 1992 and 1996. In particular, the [Lambda]{sub b} lifetime has been measured using the exclusive decay channel [Lambda]{sub b} → J/[psi][Lambda]°. The B+ cross section, based upon the decay B+ → J/[psi]K+, has been finalized, as well as the ratio of inclusive b quark cross sections at √s = 630 GeV and 1800 GeV. Early results from the new data run with the displaced-track trigger, which shows great promise for b physics at CDF, are presented.
Download or read book The CDF Data Handling System written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Collider Detector at Fermilab (CDF) records proton-antiproton collisions at center of mass energy of 2.0 TeV at the Tevatron collider. A new collider run, Run II, of the Tevatron started in April 2001. Increased luminosity will result in about 1 PB of data recorded on tapes in the next two years. Currently the CDF experiment has about 260 TB of data stored on tapes. This amount includes raw and reconstructed data and their derivatives. The data storage and retrieval are managed by the CDF Data Handling (DH) system. This system has been designed to accommodate the increased demands of the Run II environment and has proven robust and reliable in providing reliable flow of data from the detector to the end user. This paper gives an overview of the CDF Run II Data Handling system which has evolved significantly over the course of this year. An outline of the future direction of the system is given.
Book Synopsis An Additional Study of Multi-muon Events Produced in $p\bar{p}$ Collisions at $\sqrt{s} by :
Download or read book An Additional Study of Multi-muon Events Produced in $p\bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2011 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present one additional study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. We use a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 3.9 fb−1. We investigate the distribution of the azimuthal angle between the two trigger muons in events containing at least four additional muon candidates to test the compatibility of these events with originating from known QCD processes. We find that this distribution is markedly different from what is expected from such QCD processes and this observation strongly disfavours the possibility that multi-muon events result from an underestimate of the rate of misidentified muons in ordinary QCD events.
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