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AbstractAbstract
[en] We present the Poincare algebra interpolating between instant and light-front time quantizations. The angular momentum operators satisfying SU(2) algebra are constructed in an arbitrary interpolation angle and shown to be identical to the ordinary angular momentum and Leutwyler-Stern angular momentum in the instant and light-front quantization limits, respectively. The exchange of the dynamical role between the transverse angular mometum and the boost operators is manifest in our newly constructed algebra
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FG02-96ER40947; Othernumber: PRVDAQ000064000008085013000001; 076118PRD
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Ji, Hantao; Kronberg, Philipp; Prager, Stewart C.; Uzdensky, Dmitri A.
Princeton Plasma Physics Lab., Princeton, NJ (United States). Funding organisation: USDOE Office of Science (United States)2008
Princeton Plasma Physics Lab., Princeton, NJ (United States). Funding organisation: USDOE Office of Science (United States)2008
AbstractAbstract
[en] This paper provides a concise summary of the current status of the research and future perspectives discussed in the Mini-Conference on Angular Momentum Transport in Laboratory and Nature. This Mini-conference, sponsored by the Topical Group on Plasma Astrophysics, was held as part of the American Physical Society's Division of Plasma Physics 2007 Annual Meeting (November 12-16, 2007). This Mini-conference covers a wide range of phenomena happening in fluids and plasmas, either in laboratory or in nature. The purpose of this paper is not to comprehensively review these phenomena, but to provide a starting point for interested readers to refer to related research in areas other than their own
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6 May 2008; 25 p; ACO2-76CHO3073; Also available from OSTI as DE00959388; PURL: https://www.osti.gov/servlets/purl/959388-tA0p9L/; doi 10.2172/959388
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Abelev, B.I.; Adams, J.; Aggarwal, M.M.; Ahammed, Z.; Amonett, J.; Anderson, B.D.; Anderson, M.; Arkhipkin, D.; Averichev, G.S.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L.S.; Baudot, J.; Bekele, S.; Belaga, V.V.; Bellingeri-Laurikainen, A.; Bellwied, R.; Benedosso, F.; Bhardwaj, S.; Bhasin, A.; Bhati, A.K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L.C.; Blyth, S.-L.; Bonner, B.E.; Botje, M.; Bouchet, J.; Brandin, A.V.; Bravar, A.; Bystersky, M.; Cadman, R.V.; Cai, X.Z.; Caines, H.; Calderon de la Barca Sanchez, M.; Castillo, J.; Catu, O.; Cebra, D.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H.F.; Chen, J.H.; Cheng, J.; Cherney, M.; Chikanian, A.; Christie, W.; Coffin, J.P.; Cormier, T.M.; Cosentino, M.R.; Cramer, J.G.; Crawford, H.J.; Das, D.; Das, S.; Daugherity, M.; de Moura, M.M.; Dedovich, T.G.; DePhillips, M.; Derevschikov, A.A.; Didenko, L.; Dietel, T.; Djawotho, P.; Dogra, S.M.; Dong, W.J.; Dong, X.; Draper, J.E.; Du, F.; Dunin, V.B.; Dunlop, J.C.; Dutta Mazumdar, M.R.; Eckardt, V.; Edwards, W.R.; Efimov, L.G.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Filimonov, K.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Fu, J.; Gagliardi, C.A.; Gaillard, L.; Ganti, M.S.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, J.S.; Gorbunov, Y.G.; Gos, H.; Grebenyuk, O.; Grosnick, D.; Guertin, S.M.; Guimaraes, K.S.F.F.; Guo, Y.; Gupta, N.; Gutierrez, T.D.; Haag, B.; Hallman, T.J.; Hamed, A.; Harris, J.W.; He, W.; Heinz, M.; Henry, T.W.; Hepplemann, S.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffman, A.M.; Hoffmann, G.W.; Horner, M.J.; Huang, H.Z.; Huang, S.L.; Hughes, E.W.; Humanic, T.J.; Igo, G.; Jacobs, P.; Jacobs, W.W.; Jakl, P.; Jia, F.; Jiang, H.; Jones, P.G.; Judd, E.G.; Kabana, S.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Khodyrev, V.Yu.; Kim, B.C.; Kiryluk, J.; Kisiel, A.; Kislov, E.M.; Klein, S.R.; Kocoloski, A.; Koetke, D.D.
Brookhaven National Laboratory (US)
arXiv e-print [ PDF ]2007
Brookhaven National Laboratory (US)
arXiv e-print [ PDF ]2007
AbstractAbstract
[en] The system created in non-central relativistic nucleus-nucleus collisions possesses large orbital angular momentum. Due to spin-orbit coupling, particles produced in such a system could become globally polarized along the direction of the system angular momentum. We present the results of Lambda and anti-Lambda hyperon global polarization measurements in Au+Au collisions at sqrt sNN=62.4 GeV and 200 GeV performed with the STAR detector at RHIC. The observed global polarization of Lambda and anti-Lambda hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, lbar P Lambda, anti-Lambda rbar<= 0.02, is compared to the theoretical values discussed recently in the literature
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LBNL--63648; AC02-05CH11231; Available from OSTI as DE00932583; PURL: https://www.osti.gov/servlets/purl/932583-4L6Ay5/; Journal Publication Date: 08/29/2007
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Journal Article
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Physical Review. C, Nuclear Physics (Online); ISSN 1089-490X;
; v. 76; vp

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AbstractAbstract
[en] This note contains a discussion of various expansions of the angular momentum projection operator in terms of the operators J+, J- and Jo. This gives us opportunity to rederive the famous Loewdin's shift operator formula. As a starting point the integral representation of the projector is used, which is done in a somewhat different way than that proposed by Raynal. (orig.)
[de]
Die Arbeit enthaelt eine Diskussion verschiedener Entwicklungen des Drehimpulsprojektionsoperators im Hinblick auf die Operatoren J+, J- und Jo. Das gibt uns die Gelegenheit, die beruehmte Verschiebungsoperatorformel von Loewdin erneut abzuleiten. Als Ausgangspunkt wird die Integraldarstellung des Projektors in einer von Raynals Vorschlaegen etwas abweichenden Form verwendet. (orig./AK)Primary Subject
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4 refs.
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Z. Phys., A; v. 275(3); p. 277-282
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AbstractAbstract
No abstract available
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Chinese Academy of Sciences, Lanzhou (China). Inst. of Modern Physics; National Laboratory of Heavy Ion Accelerator, Lanzhou (China); 174 p; ISBN 7-5022-2675-3;
; 2002; p. 19

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Book
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Ramachandran, G.; Vidya, M.S.
DAE symposium on nuclear physics (held at Bombay during December 26-30, 1991) : Contributed papers.Vol. 34B (1991)1991
DAE symposium on nuclear physics (held at Bombay during December 26-30, 1991) : Contributed papers.Vol. 34B (1991)1991
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[en] Short communication. 5 refs
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Kailas, S.; Singh, P. (Bhabha Atomic Research Centre, Bombay (India)) (eds.); Department of Atomic Energy, Bombay (India); 568 p; 1991; p. 237-238; Bhabha Atomic Research Centre; Bombay (India); DAE symposium on nuclear physics; Bombay (India); 26-30 Dec 1991
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AbstractAbstract
[en] The eigenvalue j(j+1) of the total angular momentum operator squared J2 follows from the commutation relations for angular momentum. An alternative proof is given based on the uncertainty relation for the angular momentum components J1 and J2. For expectation values in the state vertical bar j, j>, the uncertainty relation holds as an equality and is used in the proof. (author)
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Available online at the Web site for the European Journal of Physics (ISSN 1361-6404) http://www.iop.org/; Country of input: Syrian Arab Republic
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Journal Article
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European Journal of Physics; ISSN 0143-0807;
; v. 19(2); p. 119-123

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AbstractAbstract
[en] It is shown how the number of J-states in a configuration can be calculated approximately. A particularly simple method for obtaining the moments of Jsub(z) is presented. Starting from a simple Gaussian approximation to the distribution of M, the total projection of angular momentum, it is natural to make an expansion in terms of the cumulants of the distribution. Results from various approximations are compared with the exact values. It is found that an expansion due to Edgeworth gives more reliable results than the Gram-Charlier series. (orig.)
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Journal Article
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Zeitschrift fuer Physik. A, Atoms and Nuclei; ISSN 0340-2193;
; v. 301(3); p. 237-242

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Manchon, Louis
Universite Paris-Saclay, Ecole doctorale no. 127, Astronomie et Astrophysique d'Ile de France - AAIF, Espace Technologique, Immeuble Discovery, Route de l'Orme aux Merisiers RD 128, 91190 Saint-Aubin (France); Institut d'Astrophysique Spatiale, Universite Paris-Sud, Orsay (France); Lesia, Observatoire de Paris, PSL Research University, CNRS, Universite Pierre et Marie Curie, Universite Denis Diderot, 92195 Meudon (France)2021
Universite Paris-Saclay, Ecole doctorale no. 127, Astronomie et Astrophysique d'Ile de France - AAIF, Espace Technologique, Immeuble Discovery, Route de l'Orme aux Merisiers RD 128, 91190 Saint-Aubin (France); Institut d'Astrophysique Spatiale, Universite Paris-Sud, Orsay (France); Lesia, Observatoire de Paris, PSL Research University, CNRS, Universite Pierre et Marie Curie, Universite Denis Diderot, 92195 Meudon (France)2021
AbstractAbstract
[en] Rotation has important consequences for stellar internal structure and evolution. The centrifugal acceleration deforms the star and balances the gravitational one, mimicking a lower mass star. Most importantly, meridional circulations and rotation-induced turbulence mix chemical elements, extending the life of the star and affecting stellar age determinations, one of the most important problems in astrophysics. Lastly, the interaction between rotation and convection generates magnetic fields, maintaining a dynamo. The associated activity has a determining influence on the survival of stellar atmospheres. Asteroseismic observations from the space missions CoRoT and Kepler have clearly shown that current 1D models of angular momentum transport in stellar radiative zones (turbulent viscosity and meridional circulation) are not satisfactory. Other mechanisms must be in action, such as internal gravity waves, magnetic fields and mixed modes. All models proposed for these mechanisms are incomplete. In particular, their description must account for 2D effects. The 1D description of rotation is usually justified by the fact that horizontal turbulence is much stronger than the vertical in stellar radiative zones, and it suppresses all the latitudinal gradients. Rotation should then be uniform in latitude. This is surely not the case in a convection zone which has differential rotation in latitude. Because internal gravity waves are generated at the base of convective envelopes, the Doppler shift experienced by these waves when they enter the radiation zone should depend on latitude. These waves are further filtered in the transition zone between the convection and radiation zones (the so-called tachocline), a zone that has a strong differential rotation. This PhD thesis is devoted to the implementation of a simplified treatment of transport of angular momentum in a stellar evolution code in which the structure is still partly treated in 1D. This treatment is based on a deformation method that enables the computation of the 2D structure of the star, as well as the induced perturbation of the various fields (density, effective gravity, etc.). The transport of angular momentum is then treated in 2D, and will allow the further study of additional mechanisms of transport. (author)
[fr]
La rotation a des consequences importantes sur la structure interne et l'evolution stellaire. La force centrifuge deforme l'etoile et equilibre en partie la gravite, imitant une etoile de masse inferieure. Plus important encore, la circulation meridienne et la turbulences induites par la rotation melangent les elements chimiques, prolongeant la vie de l'etoile et affectant la determination de l'age stellaire, l'un des problemes les plus importants en astrophysique. Enfin, l'interaction entre la rotation et la convection genere des champs magnetiques. L'activite associee a une influence determinante sur la survie des atmospheres stellaires. Les observations asterosismiques des missions spatiales CoRoT et Kepler ont clairement montre que les modeles 1D actuels de transport du moment cinetique dans les zones radiatives stellaires (viscosite turbulente et circulation meridienne) ne sont pas satisfaisants. D'autres mecanismes entrent certainement en jeu, tels que les ondes de gravite interne, les champs magnetiques ou les modes mixtes. Tous les modeles proposes pour ces mecanismes sont, pour l'instant, incomplets. En particulier, leur description doit tenir compte des effets en 2D. La description 1D de la rotation est generalement justifiee par le fait que la turbulence horizontale est beaucoup plus forte que la verticale dans les zones radiatives stellaires, et supprime tous les gradients latitudinaux. La rotation doit donc etre uniforme en latitude. Ce n'est cependant pas le cas dans une zone de convection qui presente une rotation differentielle en latitude. Comme les ondes de gravite internes sont generees a la base des enveloppes convectives, le decalage Doppler subi par ces ondes lorsqu'elles entrent dans la zone radiative devrait dependre de la latitude. Ces ondes sont ensuite filtrees dans la zone de transition entre les zones de convection et de rayonnement (appelee tachocline), une zone qui presente une forte rotation differentielle. Ce doctorat est consacre a la mise en oeuvre d'un traitement simplifie du transport du moment cinetique dans un code d'evolution stellaire dans lequel la structure est toujours traitee en 1D. Ce traitement est base sur une methode de deformation qui permet de calculer la structure 2D de l'etoile, ainsi que la perturbation induite des differents champs (densite, gravite effective, etc.). Le transport du moment angulaire est ensuite traite en 2D, et permettra d'etudier plus en detail d'autres mecanismes de transport. (auteur)Original Title
Du transport de moment cinetique dans les zones radiatives stellaires, en 2D
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19 Jan 2021; 273 p; 393 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; These de doctorat de l'universite Paris-Saclay, Specialite: Astronomie et Astrophysique
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de Teramond, Guy
SLAC National Accelerator Laboratory (United States). Funding organisation: US Department of Energy (United States)2010
SLAC National Accelerator Laboratory (United States). Funding organisation: US Department of Energy (United States)2010
AbstractAbstract
[en] We discuss some remarkable features of the light-front holographic mapping of classical gravity in anti-de Sitter space modified by a confining dilaton background. In particular, we show that a positive-sign dilaton solution exp(+k2z2) has better chances to describe the correct hadronic phenomenology than the negative solution exp (-k2z2) extensively studied in the literature. We also show that the use of twist-scaling dimensions, instead of canonical dimensions, is required to give a good description of the spectrum and form factors of hadrons. Another key element is the explicit connection of AdS modes of total angular momentum J with the internal structure of hadrons and the proper identification of the orbital angular momentum of the constituents.
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25 Aug 2010; 15 p; 11. Hadron Physics; Sao Paulo (Brazil); 21-26 Mar 2010; AC02-76SF00515; Available from http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-14154.pdf; PURL: https://www.osti.gov/servlets/purl/992965-P9WNPl/
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