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Indications Of Suppression Of Excited Upsilon States In Pbpb Collisions At Sqrts Nn
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Book Synopsis Indications of Suppression of Excited $\Upsilon$ States in PbPb Collisions at $\sqrt{S_{NN}}$ by :
Download or read book Indications of Suppression of Excited $\Upsilon$ States in PbPb Collisions at $\sqrt{S_{NN}}$ written by and published by . This book was released on 2011 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comparison of the relative yields of Upsilon resonances in the mu(+) mu( - ) decay channel in PbPb and pp collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV, is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4 GeV/c and pseudorapidity below 2.4, the double ratio of the Upsilon(2S) and Upsilon(3S) excited states to the Upsilon(1S) ground state in PbPb and pp collisions, (Upsilon(2S+3S)/Upsilon(1S)[PbPb])/(Upsilon(2S+3S)/Upsilon(1S)[pp]), is found to be 0.31 - 0.15 + 0.19 (stat.) +/- 0.03 (syst.). The probability to obtain the measured value, or lower, if the true double ratio is unity, has been calculated to be less than 1%.
Book Synopsis Strong Suppression of [upsilon] Excited States in Pb+Pb Collisions at [square Root]s[subscript NN] by : Chad Steven Flores
Download or read book Strong Suppression of [upsilon] Excited States in Pb+Pb Collisions at [square Root]s[subscript NN] written by Chad Steven Flores and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The relative yields of [upsilon] mesons produced in p + p and Pb+Pb collisions at [square root] s[subscript NN] = 5.02 TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, [upsilon](2S) and [upsilon](3S), to the ground state, [upsilon](1S), in both Pb+Pb and p + p collisions at the same energy. The double ratios, [[upsilon](nS)/[upsilon](1S)][subscript PbPb] /[[upsilon](nS)/[upsilon](1S)][subscript pp] ,are measured to be 0.308 ± 0.055 (stat) ± 0.019 (syst) for the [upsilon](2S) and less than 0.26 at 95% confidence level for the [upsilon](3S). The double ratios are studied as a function of collision centrality, as well as dimuon transverse momentum, and rapidity. As a function ofcollision centrality the [upsilon](2S) double ratio is consistent with unity in the most peripheral (70–100%) bin and is consistent with zero in the most central (0–5%) bin. The [upsilon](2S) double ratio is consistent with a constant dependence on the kinematic variables, with a large suppression seen throughout the studied kinematic range. No significant [upsilon](3S) signal is found in the Pb+Pb data. The [upsilon](3S) double ratio is consistently below unity for all bins, including the most peripheral (50–100%) bin, indicating a strong suppression of the [upsilon](3S) relative to the [upsilon](1S).
Book Synopsis Suppression of $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S)$ Production in PbPb Collisions at $\sqrt{s_{NN}}$ by :
Download or read book Suppression of $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S)$ Production in PbPb Collisions at $\sqrt{s_{NN}}$ written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The production yields of Upsilon(1S), Upsilon(2S), and Upsilon(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76 TeV. The data correspond to integrated luminosities of 166 inverse microbarns and 5.4 inverse picobarns for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of Upsilon rapidity $y$ up to 2.4, and transverse momentum pt up to 20 GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to ~2 and 8, for the Upsilon(1S) and Upsilon(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or pt. The Upsilon(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of ~7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma.
Book Synopsis Nuclear Modification of $\Upsilon$ States in PPb Collisions at $\sqrts_\mathrm{NN}}$ by : Armen Tumasyan
Download or read book Nuclear Modification of $\Upsilon$ States in PPb Collisions at $\sqrts_\mathrm{NN}}$ written by Armen Tumasyan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of [Upsilon](1S + 2S +3S) Production in P + P and Au + Au Collisions at \(\sqrt{s_{\mathrm{NN}}} by :
Download or read book Measurement of [Upsilon](1S + 2S +3S) Production in P + P and Au + Au Collisions at \(\sqrt{s_{\mathrm{NN}}} written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of bottomonium production in heavy-ion and p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three [Upsilon] states, [Upsilon](1S + 2S + 3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au+Au and p+p collisions at \(\sqrt{s_{\mathrm{NN}}}=200\) GeV. The [Upsilon](1S + 2S + 3S) 2!ee− differential cross section at midrapidity was found to be Beed[sigma]/dy = 108 ± 38 (stat) ± 15 (syst) ± 11 (luminosity) pb in p+p collisions. The nuclear modification factor in the 30% most central Au+Au collisions indicates a suppression of the total [Upsilon] state yield relative to the extrapolation from p+p collision data. Thus, the suppression is consistent with measurements at higher energies by the CMS experiment at the Large Hadron Collider.
Book Synopsis Suppression and Azimuthal Anisotropy of Prompt and Nonprompt $J/\psi$ Production in PbPb Collisions at $\sqrt{s_{NN}}$ by :
Download or read book Suppression and Azimuthal Anisotropy of Prompt and Nonprompt $J/\psi$ Production in PbPb Collisions at $\sqrt{s_{NN}}$ written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The nuclear modification factor ${R_{\mathrm{AA}}} $ and the azimuthal anisotropy coefficient ${v_{2}} $ of prompt and nonprompt (i.e. those from decays of b hadrons) $\mathrm{J}/\psi$ mesons, measured from PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}} = $ 2.76 TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta $p_{\mathrm{T}}> $ 6.5 GeV/$c$ and rapidity $
Book Synopsis Upsilon Production and Suppression as Measured by STAR in P+p, D+Au, and Au+Au Collisions at [squareroot]s(NN) by : Anthony Robert Kesich
Download or read book Upsilon Production and Suppression as Measured by STAR in P+p, D+Au, and Au+Au Collisions at [squareroot]s(NN) written by Anthony Robert Kesich and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Debye screening of inter-quark potentials leading to suppression of heavy quarkonia has long been a studied signature of the onset of partonic deconfinement. We report on the production of [Upsilon](1S+2S+3S) mesons at [squareroot]s(NN) = 200 GeV in p + p, d + Au, and Au + Au collisions as measured by the Solenoidal Tracker At RHIC. We compare our measured yield in p + p collisions to those in d + Au and Au + Au collisions to obtain nuclear modification factors and quantify suppression effects from both hot and cold nuclear matter. We separate our Au + Au measurements into three centrality classes. We obtain a nu- clear modification factor for [Upsilon](1S+2S+3S) in the rapidity range [vertical line]y[vertical line]
Book Synopsis Ultrarelativistic Heavy-Ion Collisions by : Ramona Vogt
Download or read book Ultrarelativistic Heavy-Ion Collisions written by Ramona Vogt and published by Elsevier. This book was released on 2007-06-04 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is designed for advanced undergraduate and graduate students in high energy heavy-ion physics. It is relevant for students who will work on topics being explored at RHIC and the LHC. In the first part, the basic principles of these studies are covered including kinematics, cross sections (including the quark model and parton distribution functions), the geometry of nuclear collisions, thermodynamics, hydrodynamics and relevant aspects of lattice gauge theory at finite temperature. The second part covers some more specific probes of heavy-ion collisions at these energies: high mass thermal dileptons, quarkonium and hadronization. The second part also serves as extended examples of concepts learned in the previous part. Both parts contain examples in the text as well as exercises at the end of each chapter. - Designed for students and newcomers to the field- Focuses on hard probes and QCD- Covers all aspects of high energy heavy-ion physics- Includes worked example problems and exercises
Book Synopsis Nuclear and Particle Physics by : Brian R. Martin
Download or read book Nuclear and Particle Physics written by Brian R. Martin and published by John Wiley & Sons. This book was released on 2011-08-31 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible introduction to nuclear and particle physics with equal coverage of both topics, this text covers all the standard topics in particle and nuclear physics thoroughly and provides a few extras, including chapters on experimental methods; applications of nuclear physics including fission, fusion and biomedical applications; and unsolved problems for the future. It includes basic concepts and theory combined with current and future applications. An excellent resource for physics and astronomy undergraduates in higher-level courses, this text also serves well as a general reference for graduate studies.
Book Synopsis An Introduction to Synchrotron Radiation by : Philip Willmott, PhD
Download or read book An Introduction to Synchrotron Radiation written by Philip Willmott, PhD and published by John Wiley & Sons. This book was released on 2011-06-15 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the reader to the basic concepts of the generation and manipulation of synchrotron light, its interaction with matter, and the application of synchrotron light in the “classical” techniques, while including some of the most modern technological developments. As much as possible, complicated mathematical derivations and formulas are avoided. A more heuristic approach is adopted, whereby the general physical reasoning behind the equations is highlighted. Key features: A general introduction to synchrotron radiation and experimental techniques using synchrotron radiation Contains many detailed “worked examples” from the literature Of interest for a broad audience - synchrotrons are possibly one of the best examples of multidisciplinary research Four-colour presentation throughout
Book Synopsis Hot Hadronic Matter by : Jean Letessier
Download or read book Hot Hadronic Matter written by Jean Letessier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has seen the development of the operational understanding of fun damental interactions within the standard model. This has detoured our attention from the great enigmas posed by the dynamics and collective behavior of strongly interacting particles. Discovered more than 30 years ago, the thermal nature of the hadronic particle spectra has stimulated considerable theoretical effort, which so far has failed to 'confirm' on the basis of microscopic interactions the origins of this phenomenon. However, a highly successful Statistical Bootstrap Model was developed by Rolf Hagedorn at CERN about 30 years ago, which has led us to consider the 'boiling hadronic matter' as a transient state in the trans formation of hadronic particles into their melted form which we call Quark-GIuon-Plasma (QGP). Today, we return to seek detailed understanding of the thermalization processes of hadronic matter, equipped on the theoretical side with the knowledge of the fundamental strong interaction theory, the quantum chromo-dynamics (QCD), and recognizing the im portant role of the complex QCD-vacuum structure. On the other side, we have developed new experimental tools in the form of nuclear relativistic beams, which allow to create rather extended regions in space-time of Hot Hadronic Matter. The confluence of these new and recent developments in theory and experiment led us to gather together from June 27 to July 1, 1994, at the Grand Hotel in Divonne-Ies-Bains, France, to discuss and expose the open questions and issues in our field.
Download or read book Heavy Flavours written by A J Buras and published by World Scientific. This book was released on 1992-11-26 with total page 803 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of review articles on the most outstanding topics in heavy flavour physics. All the authors have made significant contributions to this field. The book reviews in detail the theoretical structure of heavy flavour physics within the Standard Model and its confrontation with existing experimental data.The physics of the top quark and of the Higgs play an important role in this volume. Beginning with radiative electroweak corrections and their impressive tests at LEP and hadron colliders, the book summarizes the present status of quark mixing, CP violation and rare decays. The dynamics of exclusive D- and B-meson decays, the τ-lepton physics and the newly discovered heavy quark symmetries are discussed in detail. The impact of strong interactions on weak decays is clearly visible in many articles. The physics of heavy flavours at LEP, HERA and hadron colliders constitutes an important part of the book. Another significant topic is the possible role of heavy flavours in the spontaneous symmetry breaking of gauge symmetries. Finally the most recent advances in lattice calculations of the properties of heavy flavours and the lattice studies of the dynamics of heavy flavours are presented.
Author :H.V. Klapdor-Kleingrothaus Publisher :Springer Science & Business Media ISBN 13 :364256643X Total Pages :747 pages Book Rating :4.6/5 (425 download)
Book Synopsis Dark Matter in Astro- and Particle Physics by : H.V. Klapdor-Kleingrothaus
Download or read book Dark Matter in Astro- and Particle Physics written by H.V. Klapdor-Kleingrothaus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dark matter in the Universe has become one of the most exciting and central fields of astrophysics, particle physics and cosmology. The lectures and talks in this book emphasize the experimental and theoretical status and perspectives of the ongoing search for dark matter, and the future potential of the field into the next millennium, stressing in particular the interplay between astro- and particle physics.
Book Synopsis Flora of North America North of Mexico by :
Download or read book Flora of North America North of Mexico written by and published by . This book was released on 2014 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hadronic Structure by : José L. Goity
Download or read book Hadronic Structure written by José L. Goity and published by World Scientific. This book was released on 2001 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains lectures presented at the 14th Annual Hampton University Graduate Studies at the Continuous Electron Beam Accelerator Facility (HUGS at CEBAF), that took place at Jefferson Lab and Hampton University from June 1st to 18th, 1999. The programme was focused on the structure of hadrons from the low to the high energy regimes, including a balance of theory and experiment, and emphasized topics in electron scattering on the nucleon and nuclei.
Book Synopsis Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop by : Gerard Mourou
Download or read book Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop written by Gerard Mourou and published by . This book was released on 2020 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The CERN Larg Hardron Collider by : Amos Breskin
Download or read book The CERN Larg Hardron Collider written by Amos Breskin and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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