Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Hadron Production In Light And Heavy Quark And Antiquark Jets
Download Hadron Production In Light And Heavy Quark And Antiquark Jets full books in PDF, epub, and Kindle. Read online Hadron Production In Light And Heavy Quark And Antiquark Jets ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Hadron Production in Light and Heavy, Quark and Antiquark Jets by :
Download or read book Hadron Production in Light and Heavy, Quark and Antiquark Jets written by and published by . This book was released on 1996 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors review four hadronization studies performed by the SLD experiment at SLAC, involving separation of light (Z° → u{anti u}, d{anti d}, s{anti s}), c, and b flavors using precision vertexing, and separation of q- and {anti q}-jets using the highly polarized SLC electron beam. They measured the differences between the average charged multiplicities in Z° → light, → c{anti c}, and →b{anti b} events, and found that the results were consistent with predictions of perturbative QCD. Next, they measured?/?/p/?°/?° production in light events for the first time, and compared with production in c- and b-flavor events. They then examined particle production differences in light quark and antiquark hemispheres, and observed more high momentum baryons and K−s̀ than antibaryons and Ks̀ in quark hemispheres, consistent with the leading particle hypothesis. Lastly, they performed a search for jet handedness in light q- and {anti q}-jets. Assuming Standard Model values of quark polarization in Z° decays, they have set an improved upper limit on the analyzing power of the handedness method.
Book Synopsis Hadron Production in Quark, Antiquark, and Gluon Jets from Electron-Positron Interactions at the Z0 Pole by :
Download or read book Hadron Production in Quark, Antiquark, and Gluon Jets from Electron-Positron Interactions at the Z0 Pole written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present production measurements of the charged hadrons [pi]{sup {+-}}, K{sup {+-}} and p/{bar p} in ee− interactions at the Z° pole. The excellent particle identification capability of the SLC Large Detector (SLD) at the Stanford Linear Collider (SLC) are used. In addition to studies over a wide momentum range in hadronic Z° events of all five flavors, we have made the most precise measurements in light (uds), c and b flavor events separately. Unambiguous flavor dependencies have been observed, and the results have been compared with the predictions of several QCD fragmentation models. We have also exploited the unique feature of electron beam polarization in our experiment to compare hadron production separately in quark and antiquark jets. Direct evidence that higher momentum hadrons are more likely to contain the primary quark and antiquark is seen, with precision sufficient to provide new model tests. Finally, we have studied hard gluon jets in detail. We have confirmed that gluon jets have a higher multiplicity of softer particles than light quark jets, and found this enhancement to be the same for [pi]{sup {+-}}, K{sup {+-}} and p/{bar p} at the few percent level at all momenta. Any overall difference in the hadron fractions is limited to 0.018 at the 95% confidence level, indicating that there are no differences at the hadronization stage in jet formation between gluons and quarks.
Book Synopsis Hadron Production in Quark and Antiquark Jets by :
Download or read book Hadron Production in Quark and Antiquark Jets written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a number of jet fragmentation measurements ee− --> hadrons. The ALEPH collaboration measures inclusive rho°(770), f0(980) and f2(1270) production rates, improving the world averages. The SLD collaboration measures pi{sup {+-}}, K{sup {+-}} and p/anti-p production in light-, c- and b-flavor Z° decays, as well as leading hadrons in light-quark jets, precisely. The DELPHI collaboration measures the average charged multiplicity in light- and b-flavor events at 183 and 189 GeV, verifying a precise prediction of QCD and excluding flavor-independent fragmentation.
Book Synopsis Hadron Production in Quark, Antiquark, and Gluon Jets from Electron-positron Interactions at the Z0 Pole by : Hyejoo Kang
Download or read book Hadron Production in Quark, Antiquark, and Gluon Jets from Electron-positron Interactions at the Z0 Pole written by Hyejoo Kang and published by . This book was released on 2002 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Heavy Quark Jets Produced by E+e± Annihilation at 29 GeV by : Peter Cavanagh Rowson
Download or read book Properties of Heavy Quark Jets Produced by E+e± Annihilation at 29 GeV written by Peter Cavanagh Rowson and published by . This book was released on 1985 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Jets of Hadrons written by Werner Hofmann and published by Springer. This book was released on 2006-04-11 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis '96 QCD and High Energy Hadronic Interactions by : J. Thanh Van Tran
Download or read book '96 QCD and High Energy Hadronic Interactions written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1996 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Physics by : National Research Council
Download or read book Nuclear Physics written by National Research Council and published by National Academies Press. This book was released on 1999-03-31 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic progress has been made in all branches of physics since the National Research Council's 1986 decadal survey of the field. The Physics in a New Era series explores these advances and looks ahead to future goals. The series includes assessments of the major subfields and reports on several smaller subfields, and preparation has begun on an overview volume on the unity of physics, its relationships to other fields, and its contributions to national needs. Nuclear Physics is the latest volume of the series. The book describes current activity in understanding nuclear structure and symmetries, the behavior of matter at extreme densities, the role of nuclear physics in astrophysics and cosmology, and the instrumentation and facilities used by the field. It makes recommendations on the resources needed for experimental and theoretical advances in the coming decade.
Book Synopsis Statistical Aspects of Jets Containing Heavy Quarks by : Jared Denali Reiten
Download or read book Statistical Aspects of Jets Containing Heavy Quarks written by Jared Denali Reiten and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jets comprise a rich class of emergent phenomena stemming the underlying theory of the strong nuclear force, Quantum Chromodynamics. As jets are produced in copious quantities in hadron colliders, understanding their internal structure and evolution is of the utmost importance for modern particle physics. In this thesis, we study various aspects of a special class of jets---that is, jets containing heavy quarks, such as charm, bottom and top---which can all be understood from a statistical point of view. In the first part, we consider situations in which the observation of back-to-back heavy-quark dijet pairs shed light on key physics governing the final and initial states of high-energy particle collisions---from the modification of dijet mass spectra by the quark-gluon plasma created in the collisions of heavy ions to the probing of the Sivers spin asymmetry in deep inelastic scattering. In the second part, we analyze the internal landscapes of jets initiated by heavy quarks and demonstrate how the so-called ``dead-cone'' effect manifests in the cumulants of jet substructure distributions. In the third and final part, we adapt concepts from the machine learning community to tag top jets from a background of jets initiated by light quarks and gluons as well develop a novel data type that is particularly well-suited to exposing the characteristic angular structure of top decay products.
Book Synopsis Relativistic Heavy-ion Collisions by : Rudolph C. Hwa
Download or read book Relativistic Heavy-ion Collisions written by Rudolph C. Hwa and published by CRC Press. This book was released on 1990 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers of the June 1989 meeting in Beijing by the China Center of Advanced Science and Technology. This small book covers nucleus- nucleus collisions, states of the vacuum, and highly relativistic heavy ions in the experimental realm. Theoretical papers deal with quark-gluon plasma, and relativistic heavy ion collisions. Annotation copyrighted by Book News, Inc., Portland, OR
Book Synopsis Search for New Phenomena in Top-Antitop Quarks Final States with Additional Heavy-Flavour Jets with the ATLAS Detector by : Daiki Yamaguchi
Download or read book Search for New Phenomena in Top-Antitop Quarks Final States with Additional Heavy-Flavour Jets with the ATLAS Detector written by Daiki Yamaguchi and published by Springer Nature. This book was released on 2019-10-30 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on the search for a new heavy particle, the Vector-Like Top quark (VLT), in the Large Hadron Collider (LHC) at CERN. The signal process is the pair production of VLT decaying into a Higgs boson and top quark (TT→Ht+X, X=Ht, Wb, Zt). The signal events result in top–antitop quarks final states with additional heavy flavour jets. The book summarises the analysis of the data collected with the ATLAS detector in 2015 and 2016. In order to better differentiate between signals and backgrounds, exclusive taggers of top quark and Higgs boson were developed and optimised for VLT signals. These efforts improved the sensitivity by roughly 30%, compared to the previous analysis. The analysis outcomes yield the strongest constraints on parameter space in various BSM theoretical models. In addition, the book addresses detector operation and the evaluation of tracking performance. These efforts are essential to properly collecting dense events and improving the accuracy of the reconstructed objects that are used for particle identification. As such, they represent a valuable contribution to data analysis in extremely dense environments.
Book Synopsis Hadron Production in Ee− Annihilation. QCD and Hadronization by :
Download or read book Hadron Production in Ee− Annihilation. QCD and Hadronization written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent results on hadron production in ee− annihilation are summarized. The topics included are: (1) inclusive hadron production, (2) comparison of light (u, d, s) and heavy (c, b) quark jets; (3) p - anti p correlations; (4) gluon vs. quark jets; (5) analysis of 3 jet events; (6) measurement of the strong coupling constant .cap alpha./sub s/; and (7) forward-backward asymmetries of quarks and leptons. Experimental data are compared with predictions of several models to reveal underlying physics. 62 refs., 22 figs.
Book Synopsis Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes) by : Zygmunt Ajduk
Download or read book Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes) written by Zygmunt Ajduk and published by World Scientific. This book was released on 1997-04-11 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 28th conference from the Rochester series was the major high energy physics conference in 1996. Volume one contains short reports on new theoretical and experimental results. Volume two consists of the review talks presented in the plenary sessions.
Book Synopsis Looking Inside Jets by : Simone Marzani
Download or read book Looking Inside Jets written by Simone Marzani and published by Springer. This book was released on 2019-05-11 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise primer reviews the latest developments in the field of jets. Jets are collinear sprays of hadrons produced in very high-energy collisions, e.g. at the LHC or at a future hadron collider. They are essential to and ubiquitous in experimental analyses, making their study crucial. At present LHC energies and beyond, massive particles around the electroweak scale are frequently produced with transverse momenta that are much larger than their mass, i.e., boosted. The decay products of such boosted massive objects tend to occupy only a relatively small and confined area of the detector and are observed as a single jet. Jets hence arise from many different sources and it is important to be able to distinguish the rare events with boosted resonances from the large backgrounds originating from Quantum Chromodynamics (QCD). This requires familiarity with the internal properties of jets, such as their different radiation patterns, a field broadly known as jet substructure. This set of notes begins by providing a phenomenological motivation, explaining why the study of jets and their substructure is of particular importance for the current and future program of the LHC, followed by a brief but insightful introduction to QCD and to hadron-collider phenomenology. The next section introduces jets as complex objects constructed from a sequential recombination algorithm. In this context some experimental aspects are also reviewed. Since jet substructure calculations are multi-scale problems that call for all-order treatments (resummations), the bases of such calculations are discussed for simple jet quantities. With these QCD and jet physics ingredients in hand, readers can then dig into jet substructure itself. Accordingly, these notes first highlight the main concepts behind substructure techniques and introduce a list of the main jet substructure tools that have been used over the past decade. Analytic calculations are then provided for several families of tools, the goal being to identify their key characteristics. In closing, the book provides an overview of LHC searches and measurements where jet substructure techniques are used, reviews the main take-home messages, and outlines future perspectives.
Book Synopsis High Energy Physics 99 Proceedings of the International Europhysics Conference on High Energy Physics, Tampere, Finland, 15-21 July 1999 by : K Huitu
Download or read book High Energy Physics 99 Proceedings of the International Europhysics Conference on High Energy Physics, Tampere, Finland, 15-21 July 1999 written by K Huitu and published by CRC Press. This book was released on 2000-01-01 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Energy Physics 99 contains the 18 invited plenary presentations and 250 contributions to parallel sessions presented at the International Europhysics Conference on High Energy Physics. The book provides a comprehensive survey of the latest developments in high energy physics. Topics discussed include hard high energy, structure functions, soft interactions, heavy flavor, the standard model, hadron spectroscopy, neutrino masses, particle astrophysics, field theory, and detector development.
Book Synopsis Measurement of Charged Hadron Spectra at the Z° with Cherenkov Ring Imaging by :
Download or read book Measurement of Charged Hadron Spectra at the Z° with Cherenkov Ring Imaging written by and published by . This book was released on 1997 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation attempts to probe hadronization, the process by which the fundamental quarks described by quantum chromodynamics produce the jets of hadrons that the author observed in experiments. The measurements are made using ee− collisions at the SLAC Linear Collider (SLC), operating at the Z° resonance with the SLC Large Detector (SLD), and the unique capabilities of the SLC/SLD facility are exploited. First, the spectra of charged hadrons ([pi]{sup {+-}}, K{sup {+-}}, and p/{bar p}) are measured. This is accomplished with the SLD Cherenkov Ring Imaging Detector (CRID), one of a first generation of devices that have been developed for efficient particle identification over a wide momentum range. The use of the CRID is central to this dissertation, and its design and performance are described in detail here. The measured spectra agree with other measurements at the Z° and extend the momentum coverage. Next, the excellent spatial resolution of the SLD tracking systems, along with the small and stable beam spots of the SLC, is employed to identify jets produced from heavy b or c quarks and to separate them from the remaining light-quark (uds) jets. This removes the effects of heavy quark fragmentation and decays of heavy-quark hadrons from the study of hadronization. The first measurements of particle spectra in light-quark jets are then presented. Finally, the highly-polarized incident electron beam of the SLC, together with the electroweak asymmetries of the quarks, is exploited to separate quark and antiquark jets. Significant differences in quark-antiquark production of protons and of kaons are observed at high momenta. This signal suggests a leading particle effect, where the particles containing the primary quark of a jet are more likely to populate the high-momentum phase space than are other hadrons.
Book Synopsis On the Profiles of Jets Initiated by Light and Heavy Quarks by :
Download or read book On the Profiles of Jets Initiated by Light and Heavy Quarks written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We review some recent results in applications of the analytical perturbative technique to the description of particle distributions in QCD jets. Gluon emission in top production is briefly discussed.
