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Author :
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ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (893 download)
Download or read book Quarkonium Production in Proton Antiproton Collisions at the Tevatron written by and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (873 download)
Download or read book Heavy Quark Production at the Tevatron written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from four CDF analyses involving heavy quark production in proton-antiproton collisions at center of mass energy 1.96 TeV. The shapes of b-jets are found to be broader than inclusive predictions and broader than both PYTHIA and HERWIG defaults. A measurement of the production cross section for [psi](2S) is consistent with Run 1 results and with theoretical predictions associated with parton distribution function energy dependence. The inclusive b-jet production cross section is also consistent with theoretical predictions over six orders of magnitude. The b{bar b} differential production cross section is compared to several theoretical models and found to be best described by MC@NLO + JIMMY.
Author : Robert J. Cropp
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book A Measurement of the Polarization of J/Psi Mesons Produced in High-energy Proton-antiproton Collisions written by Robert J. Cropp and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents an analysis of the polarization of ' J'/ y mesons produced in 'pp¢' collisions at a centre-of-mass energy of 1.8 TeV. The collisions were produced by the Fermilab Tevatron collider, the world's highest energy particle accelerator. The data were recorded by the Collider Detector at Fermilab during Run 1 of the Tevatron in 1992-1995. The 'J'/ y meson consists of a charm quark and its antiquark, and is the best-known type of quarkonium, the bound state of a heavy quark-antiquark pair. The measurement of the production polarization of 'J'/ y mesons and other quarkonia provides a test of quarkonium production models. The study of quarkonium production is important for understanding the strong nuclear force between quarks. The strong force is one of the four known fundamental forces, being responsible for binding quarks into hadrons and holding atomic nuclei together. The polarization of centrally produced 'J'/ y mesons has been measured over the transverse momentum range 4-20 GeV/'c', using an analysis of the angular distribution of their decays to [mu]+[mu]-. Decay length measurements made by CDF's silicon vertex detector allowed the promptly produced ' J'/ y mesons to be separated from those produced in ' B'-hadron decays. The prompt and 'B'-decay polarization parameters, Ã'P' and Ã' B', have both been measured. The measured value of Ã' P' is positive at intermediate 'PT', but is consistent with zero above 12 GeV/'c', in apparent disagreement with predictions of the NRQCD factorization formalism.
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Author : Jodi Lamoureux
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ISBN 13 :
Total Pages : 550 pages
Book Rating : 4.:/5 (89 download)
Download or read book Direct [b-quark-anti-b-quark] Production in [proton-anti-proton] Collisions at [square Root Of] S written by Jodi Lamoureux and published by . This book was released on 1993 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Britta Tiller
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ISBN 13 :
Total Pages : 99 pages
Book Rating : 4.:/5 (645 download)
Download or read book Measurement of the Associated Production of Z Bosons and Jets in Proton-antiproton Collisions at the Tevatron written by Britta Tiller and published by . This book was released on 2009 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Freya Blekman
Publisher :
ISBN 13 : 9789064641350
Total Pages : 158 pages
Book Rating : 4.6/5 (413 download)
Download or read book Top Quark Pair Production in Proton Antiproton Collisions written by Freya Blekman and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew Chisholm
Publisher : Springer
ISBN 13 : 3319231200
Total Pages : 193 pages
Book Rating : 4.3/5 (192 download)
Download or read book Measurements of the X c and X b Quarkonium States in pp Collisions with the ATLAS Experiment written by Andrew Chisholm and published by Springer. This book was released on 2015-09-14 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis, which won one of the six 2015 ATLAS Thesis Awards, concerns the study of the charmonium and bottomonium bound heavy quark bound states. The first section of the thesis describes the observation of a candidate for the chi_b(3P) bottomonium states. This represented the first observation of a new particle at the LHC and its existence was subsequently confirmed by D0 and LHCb experiments. The second part of the thesis presents measurements of the prompt and non-prompt production of the chi_c1 and chi_c2 charmonium states in proton-proton collisions. These measurements are compared to several theoretical predictions and can be used to inform the development of theoretical models of quarkonium production.
Author : A. Ali
Publisher : Springer
ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.3/5 (91 download)
Download or read book New Aspects of High-Energy Proton-Proton Collisions written by A. Ali and published by Springer. This book was released on 1988 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articles focus on the planned European proton-proton collider, and concentrate on physics issues, rather than the more technical concerns addressed in the three previous workshops. The use of energies much higher than those of the American Superconducting Super Collider is featured. Topics include reviews of current projects, hadron collisions, lep
Author : Hua-Sheng Shao
Publisher : Springer
ISBN 13 : 9811016240
Total Pages : 173 pages
Book Rating : 4.8/5 (11 download)
Download or read book Heavy Quarkonium Production Phenomenology and Automation of One-Loop Scattering Amplitude Computations written by Hua-Sheng Shao and published by Springer. This book was released on 2016-07-09 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the study of heavy quarkonium production at high-energy colliders as a useful tool to explain both the perturbative and non-perturbative aspects of quantum choromodynamics. It provides the first comprehensive comparison between the theory and recent experiments and clarifies some longstanding puzzles in the heavy quarkonium production mechanism. In addition, it describes in detail a new framework for implementing precise computations of the physical observables in quantum field theories based on recently developed techniques. It can be used to simulate the complicated collider environment of the Large Hadron Collider at the Conseil Européen pour la Recherche Nucléaire (CERN). Its accomplishment implies that the Monte Carlo simulations for high-energy physics experiments have reached the limits of precision. It offers readers a wealth of valuable information on the relevant techniques.
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ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (873 download)
Download or read book Evidence for Electroweak Top Quark Production in Proton-antiproton Collisions at S**1/2 written by and published by . This book was released on 2007 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first evidence for electroweak single top quark production using nearly 1 fb−1 of Tevatron Run II data at √s = 1.96 TeV. We select single-top-like data events in the lepton+jets decay channel and separate them from backgrounds using the matrix element analysis method. This technique uses leading order matrix elements to compute an event probability for both signal and background hypotheses. Using the expected signal acceptance, background, and observed data we measure the single top quark cross section: [sigma](p{bar p} → tb + tqb + X) = 4.6{sub -1.5}+1.8 pb. The probability for the background to have fluctuated up to give at least the cross section measured in this analysis is 0.21%, which corresponds to a Gaussian equivalent significance of 2.9[sigma].
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ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (16 download)
Download or read book Quarkonium Production in High Energyproton-proton and Proton-nucleus Collisions written by and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a brief overview of the most relevant current issues related to quarkonium production in high energy proton-proton and proton-nucleus collisions along with some perspectives. After reviewing recent experimental and theoretical results on quarkonium production in pp and pA collisions, we discuss the emerging field of polarization studies. Afterwards, we report on issues related to heavy-quark production, both in pp and pA collisions, complemented by AA collisions. To put the work in broader perpectives, we emphasize the need for new observables to investigate the quarkonium production mechanisms and reiterate the qualities that make quarkonia a unique tool for many investigations in particle and nuclear physics.
Author :
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ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (16 download)
Download or read book Evidence for Electroweak Top Quark Production in Proton-antiproton Collisions at {u221A}s written by and published by . This book was released on 2007 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first evidence for electroweak single top quark production using nearly 1 fb-1 of Tevatron Run II data at √s = 1.96 TeV. We select single-top-like data events in the lepton+jets decay channel and separate them from backgrounds using the matrix element analysis method. This technique uses leading order matrix elements to compute an event probability for both signal and background hypotheses. Using the expected signal acceptance, background, and observed data we measure the single top quark cross section: ?(p$ar{p}$ → tb + tqb + X) = 4.6$+top{-1.5}$1.8 pb. The probability for the background to have fluctuated up to give at least the cross section measured in this analysis is 0.21%, which corresponds to a Gaussian equivalent significance of 2.9?.
Author : Peter Dominic Tamburello
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (434 download)
Download or read book Measurement of the Top Quark Production Cross Section in Proton-antiproton Collisions at 1.8 TeV Center of Mass Energy written by Peter Dominic Tamburello and published by . This book was released on 1998 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proton Structure in Proton-antiproton Collisions written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton-antiproton collisions at the Fermilab Tevatron collider currently offer the highest energy collisions available in the laboratory. In this paper the authors briefly discuss measurements which are sensitive to the internal structure of the proton. They also describe measurements which search for substructure in the partons, the quarks and gluons which form the proton.
Author : Leszek Krzysztof Kosarzewski
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book Study of Quarkonium Production in Relativistic Proton-proton Collisions in the STAR Experiment written by Leszek Krzysztof Kosarzewski and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dotyczy: particle physics, high energy physics, proton-proton collisions, strong interaction, quarkonium, fizyka cząstek elemntarnych, fizyka wysokich energii, zderzenia proton-proton, oddziaływania silne, kwarkonium.
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ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (727 download)
Download or read book Top Quark Physics at the Tevatron written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tevatron proton-antiproton collider at Fermilab with its centre of mass energy of 1.96 TeV is currently the only source for the production of top quarks. Its increased luminosity and centre of mass energy in Run II allow both collider detectors CDF and D0 to study top quarks with unprecedented scrutiny. Recent results on the top quark's pair production cross section and its properties such as mass, electric charge, helicity of the W boson in its decay and branching fraction B(t --> Wb) are presented and probe the validity of the Standard Model.
Download or read book Studies of the Top Quark at the Tevatron written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on studies of the top quark, beyond the measurements of its mass and produciton cross section, which have been carried out recently by the CDF and D0 collaborations, based on [approximately]110[+-]6 pb[sup -1] of proton-antiproton collisions at a center-of-mass energy of 1.8 TeV. Each experiment has searched for t[yields]H[sup +]b decays and, from the lack of observable signal, excluded previously unexplored regions of the [M[sub H+], tan[beta]] parameter space. D0 has studied the correlation between the spin states of pair-produced top quarks, and CDF has studied the helicity of the W bosons produced in the decay of top quarks. Within large statistical uncertainties, both measurements agree with predictions of the standard model.
