Theory Status of Quarkonium Production in Proton-nucleus Collisions PDF Download
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Languages : en
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Languages : en
Pages : 36
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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: Palaiseau Workshop Three Days of Quarkonium Production in Proton-Proton and Proton-Nucleus Collisions 2010
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Category : Heavy particles (Nuclear physics)
Languages : en
Pages : 186
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Author: Xin-nian Wang
Publisher: World Scientific
ISBN: 9814543691
Category :
Languages : en
Pages : 202
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Charmonium suppression is a promising signal of quark-gluon plasma. In this volume, the latest development both in experiments and in the theory of charmonium production in high-energy nuclear collisions are presented and discussed.
Author: Elena G. Ferreiro
Publisher:
ISBN:
Category :
Languages : en
Pages : 187
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Author: Xin-Nian Wang
Publisher: World Scientific Publishing Company Incorporated
ISBN: 9789810239114
Category : Medical
Languages : en
Pages : 189
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Charmonium suppression is a promising signal of quark-gluon plasma. In this volume, the latest development both in experiments and in the theory of charmonium production in high-energy nucleus-nucleus collisions are presented and discussed. This invaluable book is based on E Witten's lectures on topological quantum field theory which were presented in the spring of 1989 at Fine Hall, Princeton. At that time Witten unified several important mathematical works in terms of quantum field theory, most notably the Donaldson polynomial, Gromov/Floer homology and Jones polynomials. In the book Witten explains his three-dimensional construction of Jones polynomials via Chern-Simons gauge theory. The classical moduli space consists of unitary flat connections. To quantize it, he constructs a Hilbert space consisting of holomorphic sections of the natural determinant bundle over the moduli space, or non-Abelian theta functions. He explains that the quantization is independent of complex structures so that the theory becomes topological. He then constructs morphisms in terms of the Feynman path integral. He provides the relevant background, such as the Feynman -- Kac formula and Feynman diagrams, thus making the book more accessible to mathematicians. His construction leads to many beautiful applications, such as the skein relation, the surgery formula and a proof of Verlinde's formula.
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Languages : en
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In the last decades, the mechanism of production of heavy quarkonium states has been the subject of research efforts involving both theoretical and experimental developments. Even though the predictions of the presently accepted models differ, the amount of experimental data does not allow for a determination of the best suited theory. The particular case of charmonium production in hadron collisions is an attractive test case as the charm is heavy enough to allow for perturbative calculations of the production process, and yet the cross sections involved are large enough so that events can be measured with good statistics. The data collected at the HERA-B detector after the HERA-II upgrade is analyzed and used to estimate the fraction of J/Psi produced via radiative Chi sub c decays. The result is compared to theoretical predictions and it is found to agree with calculations based on the color evaporation model and with the calculations using the non-relativistic quantum chromodynamics model.
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Category : Heavy particles (Nuclear physics)
Languages : en
Pages : 186
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Languages : en
Pages :
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Understanding the structure of the hadron is of fundamental importance in subatomic physics. Production of heavy quarkonia is arguably one of the most fascinating subjects in strong interaction physics. It offers unique perspectives into the formation of QCD bound states. Heavy quarkonia are among the most studied particles both theoretically and experimentally. They have been, and continue to be, the focus of measurements in all high energy colliders around the world. Because of their distinct multiple mass scales, heavy quarkonia were suggested as a probe of the hot quark-gluon matter produced in heavy-ion collisions; and their production has been one of the main subjects of the experimental heavy-ion programs at the SPS and RHIC. However, since the discovery of J/psi at Brookhaven National Laboratory and SLAC National Accelerator Laboratory over 36 years ago, theorists still have not been able to fully understand the production mechanism of heavy quarkonia, although major progresses have been made in recent years. With this in mind, a two-week program on quarkonium production was organized at BNL on June 6-17, 2011. Many new experimental data from LHC and from RHIC were presented during the program, including results from the LHC heavy ion run. To analyze and correctly interpret these measurements, and in order to quantify properties of the hot matter produced in heavy-ion collisions, it is necessary to improve our theoretical understanding of quarkonium production. Therefore, a wide range of theoretical aspects on the production mechanism in the vacuum as well as in cold nuclear and hot quark-gluon medium were discussed during the program from the controlled calculations in QCD and its effective theories such as NRQCD to various models, and to the first principle lattice calculation. The scientific program was divided into three major scientific parts: basic production mechanism for heavy quarkonium in vacuum or in high energy elementary collisions; the formation of quarkonium in nuclear medium as well as the strong interacting quark-gluon matter produced in heavy ion collisions; and heavy quarkonium properties from the first principle lattice calculations. The heavy quarkonium production at a future Electron-Ion Collider (EIC) was also discussed at the meeting. The highlight of the meeting was the apparent success of the NRQCD approach at next-to-leading order in the description of the quarkonium production in proton-proton, electron-proton and electron positron collisions. Still many questions remain open in lattice calculations of in-medium quarkonium properties and in the area of cold nuclear matter effects.
Author: Elena G. Ferreiro
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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