Download or read book The Rise of the Proton anti proton Total Cross Section at Tevatron Energies and Beyond written by P. M. Kluit and published by . This book was released on 1987 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Proton antiproton Total Cross Section at the Tevatron Collider written by Dimitrios Alexandros Dimitroyannis and published by . This book was released on 1990 with total page 342 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 1988 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Measurement of the Proton antiproton Total Cross Section at Center of Mass Energy of 1800 GEV written by Carlos Avila and published by . This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Range of Proton antiproton Annihilation written by Maurice Levy and published by . This book was released on 1960 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental data on elastic and inelastic scattering cross-sections of antiprotons in hydrogen are now available up to energies of the order of several BeV. Although the total p-p cross-section is decreasing slowly when the energy increases, it still remains, at 2 BeV, of the order of twice the p-p cross-section. Preliminary data obtained at CERN tend to indicate that the limit of equality of the two cross-sections which is predicted by the theorem of Pomeranchuk is still not reached at 10.7 BeV. This can be taken as an indication that the pure annihilation process still remains fairly important at that high energy.

Download or read book High Energy Physics Index written by and published by . This book was released on 1990 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Worlds In Astroparticle Physics Proceedings Of The International Workshop written by Ana Maria Mourao and published by World Scientific. This book was released on 1998-05-14 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the first meeting on “New Worlds in Astroparticle Physics” focus on the joint field of particle physics and astrophysics. This is a field widely open to both theory and experiment. Important questions of particle physics — from the role of the Higgs scalar to the deconfined QCD phase, the developments beyond the Standard Model and the subtle behavior of neutrinos — are discussed. The same is true for the relevant questions in astrophysics and cosmology — from the fluctuations in the photon background radiation to large scale structure formation, dark matter searches and the origin of cosmic rays at very high energies. The two viewpoints, from the small sizes or from the large scales, are convergent and reveal the same universe: the universe of astroparticle physics.

Download or read book A Measurement of the Top antitop Production Cross Section in Proton antiproton Collisions at Center of Mass Energy written by Ulysses Allen Grundler and published by ProQuest. This book was released on 2008 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: I present a measurement of the tt¯ production cross section at s = 1.96 TeV using 2034 pb-1 of CDF Run II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes a t → Wb branching fraction of 100 percent. Events consistent with tt¯ decay are found by identifying jets containing heavy-flavor semileptonic decays to muons. The dominant backgrounds are evaluated directly from the data. Based on 248 candidate events and an expected background of 86.8+/-5.6 events, I measure a production cross section of 8.7+/-1.1+0.9-0.8+/-0.6 pb, in agreement with the Standard Model.

Download or read book Measurement of Top Anti top Cross Section in Proton Anti proton Collider at S 1 2 written by Prolay Kumar Mal and published by . This book was released on 2005 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovery of the top quark in 1995 at the Fermilab Tevatron collider concluded a long search following the 1977 discovery of bottom (b) quark [1] and represents another triumph of the Standard Model (SM) of elementary particles. Top quark is one of the fundamental fermions in the Standard Model of electroweak interactions and is the weak-isospin partner of the bottom quark. A precise measurement of top pair production cross-section would be a test of Quantum Chromodynamics (QCD) prediction. Presently, Tevatron is the world's highest energy collider where protons (p) and anti-protons ({anti p}) collide at a centre of mass energy (ps) of 1.96 TeV. At Tevatron top (t) and anti-top ({anti t}) quarks are predominantly pair produced through strong interactions--quark annihilation ({approx_equal} 85%) and gluon fusion ({approx_equal} 15%). Due to the large mass of top quark, t or {anti t} decays ({approx} 10{sup -25} sec) before hadronization and in SM framework, it decays to a W boson and a b quark with {approx} 100% branching ratio (BR). The subsequent decay of W boson determines the major signatures of t{anti t} decay. If both W bosons (coming from t and {anti t} decays) decay into leptons (viz., ev{sub e}, {mu}{nu}{sub {mu}} or {tau}{nu}{sub {tau}}) the corresponding t{bar t} decay is called dileptonic decay. Of all dileptonic decay modes of t{bar t}, the t{bar t} {yields} WWb{anti b} {yields} ev{sub e}{mu}{nu}{sub {mu}}b{anti b} (e{mu} channel) decay mode has the smallest background contamination from Z{sup 0} production or Drell-Yan process; simultaneously, it has the highest BR ({approx} 3.16%) [2] amongst all dileptonic decay modes of t{bar t}. During Run I (1992-1996) of Tevatron, three e{mu} candidate events were detected by D0 experiment, out of 80 candidate events (inclusive of all decay modes of t{bar t}). Due to the rarity of the t{bar t} events, the measured cross-section has large uncertainty in its value (viz., 5.69 {+-} 1.21(stat) {+-} 1.04(sys) pb {at} {radical}s = 1.8 TeV measured by D0 [3]). This analysis presents a cross section measurement in e{mu} channel utilizing {approx} 228 pb{sup -1} of data collected by D0 experiment during Tevatron Run II (between June 2002 and April 2004).

Download or read book Physics Briefs written by and published by . This book was released on 1989-07 with total page 1314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Measurement of the T Anti t Production Cross section in Proton Anti proton Collisions at S 1 2 written by Markus Klute and published by . This book was released on 2004 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary measurement of the t{bar t} production cross section at {radical}s = 1.96 TeV is presented. The {mu}-plus-jets final state is analyzed in a data sample of 94 pb{sup -1} and a total of 14 events are selected with a background expectation of 11.7 {+-} 1.9 events. The measurement yields: {sigma}{sub p{bar p} {yields} t{bar t} + X} = 2.4{sub -3.5}{sup +4.2}(stat.){sub -2.6}{sup +2.5}(syst.) {+-} 0.3(lumi.) pb. The analysis, being part of a larger effort to re-observe the top quark in Tevatron Run II data and to measure the production cross section, is combined with results from all available analyses channels. The combined result yields: {sigma}{sub p{bar p}} {yields} t{bar t} + X = 8.1{sub -2.0}{sup +2.2}(stat.){sub -1.4}{sup +1.6}(syst.) {+-} 0.8(lumi.) pb.

Download or read book A Measurement of the T Anti t Production Cross section in Proton Anti proton Collisions at u221A s written by and published by . This book was released on 2004 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary measurement of the t$ar{t}$ production cross section at √s = 1.96 TeV is presented. The ?-plus-jets final state is analyzed in a data sample of 94 pb-1 and a total of 14 events are selected with a background expectation of 11.7 ± 1.9 events. The measurement yields: ?p$ar{p}$ → t$ar{t}$ + X} = 2.4$+4.2top{-3.5}$(stat.)$+2.5top{-2.6}$(syst.) ± 0.3(lumi.) pb. The analysis, being part of a larger effort to re-observe the top quark in Tevatron Run II data and to measure the production cross section, is combined with results from all available analyses channels. The combined result yields: ? p$ar{p}$ → t$ar{t}$ + X = 8.1$+2.2top{-2.0}$(stat.)$+1.6top{-1.4}$(syst.) ± 0.8(lumi.) pb.

Download or read book Antiproton Proton Physics and the W Discovery written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1983 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beyond The Standard Model Ii Proceedings Of The International Conference On High Energy Physics written by Kimball A Milton and published by World Scientific. This book was released on 1991-07-30 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Critical Current Density of High-Temperature Superconductors (P Chu)Electroweak Symmetry-Breaking Effects at Colliders (V Barger)Precision Tests of the Electroweak Theory (R D Peccei)Hadron Colliders: B Factories for Now and the Future (N S Lockyer)The MSW Effect as the Solution to the Solar Neutrino Problem (S P Rosen)New Physics Effects from String Models (R Arnowitt & P Nath)Solar Neutrino Puzzle and Physics Beyond the Standard Model (R N Mohapatra)The SFT: A Super Fixed Target Beauty Facility at the SSC (B Cox)Non-Standard Stellar Evolution (V Trimble)Analogous Behaviour in the Quantum Hall Effect, Anyon Superconductivity, and the Standard Model (R B Laughlin & S B Libby)Gauge Boson Dynamics (C Quigg)Interpreting Precision Measurements (G L Kane)Rare K Decays: Present Status and Future Prospects (S G Wojcicki)Quantum Mechanics at the Black Hole Horizon (G't Hooft)Target-Space Duality and the Curse of the Wormhole (J H Schwarz)Mass Enhancement and Critical Behavior in Technicolor Theories (T Appelquist)Proton-Proton and Proton-Antiproton Elastic Scattering at High Energies — Theory, Phenomenology, and Experiment (T T Wu) Readership: Graduate students and high energy physicists. keywords:

Download or read book Proceedings of the Second International Conference on Elastic and Diffractive Scattering written by K. Goulianos and published by . This book was released on 1988 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Innovative Detectors for Supercolliders written by Eugenio Nappi and published by World Scientific. This book was released on 2004 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possible upgrade of LHC or a future generation of colliders at the extreme limits of energy and luminosity will require detectors based on very advanced technological solutions to fully exploit the physics opportunities offered. Major steps must be taken to design and realize devices that are able not only to handle very high rates but also to cope with the very harsh radiation environment without suffering any performance degradation.This book reviews the present status, current limits and recent developments in detection techniques and related aspects (simulation, signal acquisition, tracking, particle identification, etc.). Novel ideas in this domain are discussed with emphasis on the directions in which improvements in proven techniques are desired.The proceedings have been selected for coverage in: ? Index to Scientific & Technical Proceedings? (ISTP? / ISI Proceedings)? Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)? CC Proceedings ? Engineering & Physical Sciences