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Qcd Tests At Cdf
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Book Synopsis Tests of Perturbative QCD at CDF. by :
Download or read book Tests of Perturbative QCD at CDF. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The inclusive jet cross-section measured by CDF is in excellent agreement with NLO QCD below E[sub T] of 200 GeV. Above 200 GeV the measured cross-section begins to deviate from the QCD predictions with an excess of 20-50% in the 260-360 GeV range. A similar excess is observed in the two-jet mass distribution and the[Sigma] E[sub T] cross-section. The prompt photon cross-section from the CDF is in qualatative agreement with next-to-leading order QCD but has a steeper slope at low p[sub T]. Recent studies suggest that addition of soft radiation to NLO QCD may steepen the cross-section at low p[sub T].
Download or read book QCD Tests at CDF. written by and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results for the inclusive jet cross section and the dijet mass distribution. The inclusive cross section and dijet mass both exhibit significant deviations from the predictions of NLO QCD for jets with E{sub T}>200 GeV, or dijet masses> 400 GeV/c2. We show that it is possible, within a global QCD analysis that includes the CDF inclusive jet data, to modify the gluon distribution at high x. The resulting increase in the jet cross-section predictions is 25-35%. Owing to the presence of k{sub T} smearing effects, the direct photon data does not provide as strong a constraint on the gluon distribution as previously thought. A comparison of the CDF and UA2 jet data, which have a common range in x, is plagued by theoretical and experimental uncertainties, and cannot at present confirm the CDF excess or the modified gluon distribution.
Download or read book QCD Tests with CDF. written by and published by . This book was released on 1992 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurement of scaling violations, the inclusive photon and diphoton cross sections as well as the photon-jet and jet-jet angular distributions are discussed and compared to leading order and next-to-leading order QCD. A study of four-jet events is described, with a limit on the cross section for double parton scattering. The multiplicity of jets in W boson events is compared to theoretical predictions.
Book Synopsis Testing QCD with Jet Physics at CDF. by :
Download or read book Testing QCD with Jet Physics at CDF. written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis QCD Tests and New Physics Search with Jets at CDF. by :
Download or read book QCD Tests and New Physics Search with Jets at CDF. written by and published by . This book was released on 1993 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dijet invariant mass spectrum at a center of mass energy √s = 1.8 TeV measured at the Tevatron Collider by CDF in the 1988--1989 run is presented. Comparison with leading order and next-to-leading order QCD theoretical calculation is performed. A search for a possible quark compositeness and for axigluons, while not showing evidence for new physics, allows one to put limits on the compositeness mass scale [Kappa]{sub c} and on the axigulon mass M{sub a}. Preliminary results for the inclusive jet and the total transverse energy cross section from the high statistics data collected in the present run are shown.
Download or read book Recent QCD Results from CDF. written by and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we report recent QCD analysis with the new data taken from CDF detector. CDF recorded an integrated luminosity of 4.4 nb−1 during the 1988--1989 run at center of mass system (CMS) energy of 1.8 TeV. The major topics of this report are inclusive jet, dijet, trijet and direct photon analysis. These measurements are compared of QCD predictions. For the inclusive jet an dijet analysis, tests of quark compositeness are emphasized. 11 refs., 6 figs.
Download or read book QCD at D0 and CDF. written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected recent Quantum Chromodynamics (QCD) results from the D0 and CDF experiments at the Fermilab Tevatron are presented and discussed. The inclusive jet and inclusive triple differential dijet cross sections are compared to next-to-leading order QCD calculations. The sensitivity of the dijet cross section to parton distribution functions (for hadron momentum fractions (approximately) 0.01 to (approximately) 0.4) will constrain the gluon distribution of the proton. Two analyses of dijet production at large rapidity separation are presented. The first analysis tests the contributions of higher order processes to dijet production and can be considered a test of BFKL or GLAP parton evolution. The second analysis yields a strong rapidity gap signal consistent with colorless exchange between the scattered partons. The prompt photon inclusive cross section is consistent with next-to-leading order QCD only at the highest transverse momenta. The discrepancy at lower momenta may be indicative of higher order processes impacting a transverse momentum or ''k{sub T}'' to the partonic interaction. The first measurement of the strong coupling constant from the Tevatron is also presented. The coupling constant can be determined from the ratio of W + 1jet to W + 0jet cross sections and a next-to-leading order QCD calculation.
Download or read book QCD Physics at CDF. written by and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of jet production and isolated prompt photon production in p{bar p} collisions at √s = 1.8 TeV from the 1988--89 run of the Collider Detector at Fermilab (CDF). To test QCD with jets, the inclusive jet cross section (p{bar p} → J + X) and two jet angular distributions (p{bar P} → JJ + X) are compared to QCD predictions and are used to search for composite quarks. The ratio of the scaled jet cross sections at two Tevatron collision energies (√s= 546 and 1800 GeV) is compared to QCD predictions for X{sub T} scaling violations. Also, we present the first evidence for QCD interference effects (color coherence) in third jet production (p{bar p} → JJJ + X). To test QCD with photons, we present measurements of the transverse momentum spectrum of single isolated prompt photon production (p{bar p} → [gamma] + X), double isolated prompt photon production (p{bar p} → [gamma][gamma] + X), and the angular distribution of photon-jet events (p{bar p} → [gamma] J + X). We have also measured the isolated production ratio of [eta] and [pi]° mesons (p{bar p} → [eta] + X)/(p{bar p} → [pi]° + X) = 1.02 ± .15(stat) ± .23(sys).
Book Synopsis Qcd And Multiparticle Production - Proceedings Of The Xxix International Symposium On Multiparticle Dynamics by : Ina Sarcevic
Download or read book Qcd And Multiparticle Production - Proceedings Of The Xxix International Symposium On Multiparticle Dynamics written by Ina Sarcevic and published by World Scientific. This book was released on 2000-07-05 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume concentrates on three main areas of current research in high energy physics: (1) multiparticle and diffractive production in perturbative and nonperturbative QCD, (2) confinement-deconfinement mechanism and the RHIC physics, and (3) interface between high-energy collisions and cosmic-ray/astro-physics. The specific topics covered include: QCD at high energies, diffractive production, and small-x physics, multiparticle production and systematics: correlations and fluctuations, hadronic final states in e+e-, lepton-hadron and hadron-hadron collisions, relativistic heavy ion collisions, interface between high-energy collisions and cosmic-ray physics, and recent development in deconfinement.
Book Synopsis Proceedings of the QCD ... Euroconference by :
Download or read book Proceedings of the QCD ... Euroconference written by and published by . This book was released on 2003 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Qcd - 20 Years Later (In 2 Volumes) by : H A Kastrup
Download or read book Qcd - 20 Years Later (In 2 Volumes) written by H A Kastrup and published by World Scientific. This book was released on 1993-06-30 with total page 895 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings provide a general summary of the theoretical and experimental results which have established QCD as the theory of the strong interactions in the past 20 years. The experimental status of this theory in e⁺e⁻ annihilation, deep inelastic lepton-nucleon scattering and hadron-hadron collisions is reviewed and the theoretical implications are critically discussed. In addition, our knowledge on the non-perturbative sector of QCD, based on lattice and sum rule approaches, is summarized.
Download or read book QCD 96 written by S. Narison and published by . This book was released on 1997 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics in Collision 9 by : Jacob Grunhaus
Download or read book Physics in Collision 9 written by Jacob Grunhaus and published by Atlantica Séguier Frontières. This book was released on 1990 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Physics Reference Library by : Herwig Schopper
Download or read book Particle Physics Reference Library written by Herwig Schopper and published by Springer Nature. This book was released on 2020 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first open access volume of the handbook series contains articles on the standard model of particle physics, both from the theoretical and experimental perspective. It also covers related topics, such as heavy-ion physics, neutrino physics and searches for new physics beyond the standard model. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Jet Physics and QCD Tests at the Tevatron Collider by :
Download or read book Jet Physics and QCD Tests at the Tevatron Collider written by and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented detailing the status of tests of perturbative QCD in hard parton-parton collisions generated by high energy collisions of protons and antiprotons at the Fermilab Collider. Recent data fro the CDF and DO experiments are compared to Next-to-Leading Order QCD calculations in hadronic jet production, prompt photon production, jet production in events with W bosons, and b-quark production.
Book Synopsis Hadron Collider Physics 2005 by : Mario Campanelli
Download or read book Hadron Collider Physics 2005 written by Mario Campanelli and published by Springer Science & Business Media. This book was released on 2007-08-17 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of The Hadron Collider Physics Symposia (HCP) 2005, and reviews the state-of-the-art in the key physics directions of experimental hadron collider research. Topics include QCD physics, precision electroweak physics, c-, b-, and t-quark physics, physics beyond the Standard Model, and heavy ion physics. The present volume serves as a reference for everyone working in the field of accelerator-based high-energy physics.
