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Report number	arXiv:1010.5827 ; SLAC-R-996 ; TUM-EFT-11-10 ; CLNS-10-2066 ; ANL-HEP-PR-10-44 ; ALBERTA-THY-11-10 ; CP3-10-37 ; FZJ-IKP-TH-2010-24 ; INT-PUB-10-059 ; JLAB-THY-11-1308 ; FERMILAB-PUB-10-737-T ; TUM-EFT 11-10 ; CLNS 10-2066 ; ANL-HEP-PR-10-44 ; ALBERTA THY 11-10 ; CP3-10-37 ; FZJ-IKP-TH-2010-24 ; INT-PUB-10-059
Title	Heavy quarkonium: progress, puzzles, and opportunities
Author(s)	Brambilla, N. (Munich, Tech. U.) ; Eidelman, S. (Novosibirsk State U. ; Novosibirsk, IYF) ; Heltsley, B.K. (Cornell U., Phys. Dept.) ; Vogt, R. (UC, Davis ; LLNL, Livermore) ; Bodwin, G.T. (Argonne) ; Eichten, E. (Fermilab) ; Frawley, A.D. (Florida State U.) ; Meyer, A.B. (DESY) ; Mitchell, R.E. (Indiana U.) ; Papadimitriou, V. (Fermilab) ; Petreczky, P. (Brookhaven) ; Petrov, A.A. (Wayne State U.) ; Robbe, P. (Orsay, LAL) ; Vairo, A. (Munich, Tech. U.) ; Andronic, A. (Darmstadt, GSI) ; Arnaldi, R. (INFN, Turin) ; Artoisenet, P. (Ohio State U.) ; Bali, G. (Regensburg U.) ; Bertolin, A. (INFN, Padua) ; Bettoni, D. (Ferrara U. ; INFN, Ferrara) ; Brodzicka, J. (Cracow, INP) ; Bruno, G.E. (Bari U. ; INFN, Bari) ; Caldwell, A. (Munich, Max Planck Inst.) ; Catmore, J. (Lancaster U.) ; Chang, C.H. (Beijing, Inst. Theor. Phys. ; CCAST World Lab, Beijing) ; Chao, K.T. (Peking U.) ; Chudakov, E. (Jefferson Lab) ; Cortese, P. (INFN, Turin) ; Crochet, P. (Clermont-Ferrand U.) ; Drutskoy, A. (Cincinnati U.) ; Ellwanger, U. (Orsay, LPT) ; Faccioli, P. (LIP, Lisbon) ; Gabareen Mokhtar, A. (SLAC) ; Garcia i Tormo, X. (Alberta U.) ; Hanhart, C. (Julich, Forschungszentrum) ; Harris, F.A. (Hawaii U.) ; Kaplan, D.M. (IIT, Chicago) ; Klein, S.R. (LBL, Berkeley) ; Kowalski, H. (DESY) ; Lansberg, J.P. (Ecole Polytechnique, CPHT ; Orsay, IPN) ; Levichev, E. (Novosibirsk, IYF) ; Lombardo, V. (INFN, Milan) ; Lourenco, C. (CERN) ; Maltoni, F. (Louvain U.) ; Mocsy, A. (Pratt Inst.) ; Mussa, R. (INFN, Turin) ; Navarra, F.S. (Sao Paulo U.) ; Negrini, M. (Ferrara U. ; INFN, Ferrara) ; Nielsen, M. (Sao Paulo U.) ; Olsen, S.L. (Seoul Natl. U.) ; Pakhlov, P. (Moscow, ITEP) ; Pakhlova, G. (Moscow, ITEP) ; Peters, K. (Darmstadt, GSI) ; Polosa, A.D. (INFN, Rome) ; Qian, W. (Orsay, LAL ; Tsinghua U., Beijing) ; Qiu, J.W. (SUNY, Stony Brook ; Brookhaven) ; Rong, G. (Beijing, Inst. High Energy Phys.) ; Sanchis-Lozano, M.A. (Valencia U., IFIC) ; Scomparin, E. (INFN, Turin) ; Senger, P. (Darmstadt, GSI) ; Simon, F. (Munich, Tech. U. ; Munich, Max Planck Inst.) ; Stracka, S. (Milan U. ; INFN, Milan) ; Sumino, Y. (Tohoku U.) ; Voloshin, M. (Minnesota U.) ; Weiss, C. (Jefferson Lab) ; Wohri, H.K. (LIP, Lisbon) ; Yuan, C.Z. (Beijing, Inst. High Energy Phys.)
Publication	2011
Imprint	29 Oct 2010
Number of pages	181
Note	Comments: 181 pages, 112 figures. Submitted to European Physics Journal C. Editors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vairo 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vairo
In:	Eur. Phys. J. C 71 (2011) 1534
DOI	10.1140/epjc/s10052-010-1534-9
Subject category	Particle Physics - Phenomenology
Abstract	A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the $B$-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA, JLab, and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations. The plethora of newly-found quarkonium-like states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b}, and b\bar{c} bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitativ e success for others. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hot- and cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts.

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