Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector

Abdallah, J.; Abreu, P.; Adam, W.; Adžić, P.; Albrecht, Thomas; Alderweireld, T.; Alemany–Fernández, R.; Allmendinger, T.; Allport, P. P.; Almehed, S.; Amaldi, U.; Amapane, N.; Amato, S.; Anashkin, E.; Andreazza, A.; Andringa, S.; Anjos, N.; Antilogus, P.; Apel, W. D.; Arnoud, Y.; Ask, S.; Åsman, B.; Augustin, J.-E.; Augustinus, A.; Baillon, P.; Ballestrero, A.; Bambade, P.; Barbier, R.; Bardin, D. Y.; Barker, G. J.; Baroncelli, A.; Battaglia, M.; Baubillier, M.; Becks, K. H.; Begalli, M.; Behrmann, A.; Bellunato, T.; Belous, K.; Benekos, N.; Benvenuti, A. C.; Bérat, C.; Berggren, M.; Berntzon, L.; Bertrand, Daniel; Besançon, M.; Besson, N.; Blöch, D.; Blom, M.; Bonesini, M.; Boonekamp, M.; Booth, P.S.L.; Borisov, G.; Botner, O.; Bouquet, B.; Bowcock, T. J. V.; Boyko, I. R.; Bračko, M.; Brenner, R.; Brodet, E.; Brückman, P.; Brunet, J. M.; Bugge, L.; Buschmann, P.; Calvi, M.; Camporesi, T.; Canale, V.; Carena, F.; Carimalo, C.; Castro, N. F.; Cavallo, F. R.; Chapkin, M.; Charpentier, Ph.; Checchia, P.; Chierici, R.; Chliapnikov, P.; Chung, S. U.; Cieślik, K.; Collins, P.; Contri, R.; Cosme, G.; Cossutti, F.; Costa, M. J.; Crawley, Brian; Crennell, D.; Cuevas, J.; D’Hondt, J.; Dalmau, J.; Silva, T. da; Silva, W. Da; Ricca, G. Della; Angelis, A. De; Boer, W. De; Clercq, C. De; Lotto, B. De; Maria, N. De; Min, A. De; Paula, L. De; Ciaccio, L. Di; Simone, A. Di; Doroba, K.; Drees, J.; Dris, M.; Eigen, G.; Ekelöf, T.; Ellert, M.; Elsing, M.; Santo, M. C. Espírito; Fanourakis, G.; Fassouliotis, D.; Feindt, M.; Fernández, J. P.; Ferrer, A.; Ferro, F.; Flagmeyer, U.; Foeth, H.; Fokitis, E.; Fulda-Quenzer, F.; Fuster, J.; Gandelman, M.; García, C.; Gavillet, Ph.; Gazis, E. N.; Gelé, D.; Geralis, T.; Gokieli, R.; Golob, B.; Gómez-Ceballos, G.; Gonçalves, P.; Graziani, E.; Grosdidier, G.; Grzelak, K.; Guy, J.; Haag, C.; Hahn, F.; Hahn, S. R.; Hallgren, A.; Hamacher, K.; Hamilton, K.; Hansen, J. R.; Haug, S.; Hauler, F.; Hedberg, V.; Hennecke, M.; Herr, H.; Holmgren, S. O.; Holt, P. J.; Houlden, M.; Hultqvist, K.; Jackson, J. N.; Jarlskog, C.; Jarlskog, G.; Jarry, P.; Jeans, D.; Johansson, Erik; Johansson, P.; Jönsson, P.; Joram, C.; Jungermann, L.; Kapusta, F.; Katsanevas, S.; Katsoufis, E.; Keränen, R.; Kernel, G.; Kerševan, B. P.; Kiiskinen, A.; King, B. T.; Kjaer, N. J.; Kluit, P.; Kokkinias, P.; Kourkoumelis, C.; Kouznetsov, O.; Krumstein, Z.; Kucharczyk, M.; Kurowska, J.; Laforge, B.; Lämsä, J.; Leder, G.; Ledroit, F.; Leinonen, L.; Leitner, R.; Lemonne, J.; Lenzen, G.; Lepeltier, V.; Lesiak, T.; Liebig, W.; Liko, D.; Lipniacka, A.; Lopes, J. H.; Lopez, J. M.; Loukas, D.; Lutz, P.; Lyons, L.; MacNaughton, J.; Malek, A.; Maltezos, S.; Mandl, F.; Marco, J.; Marco, R.; Maréchal, B.; Margoni, M.; Marin, J. C.; Mariotti, C.; Μάρκου, Α.; Martínez-Rivero, C.; Mašík, J.; Mastroyiannopoulos, N.; Matorras, F.; Matteuzzi, C.; Mazzucato, F.; Mazzucato, M.; Nulty, R. Mc; Meroni, C.; Meyer, W. T.; Migliore, E.; Mitaroff, W.; Mjoernmark, U.; Moa, T.; Moch, M.; Mönig, K.; Monge, R.; Montenegro, J.; Moraes, D.; Moreno, S. Carrillo; Morettini, P.; Muêller, U.; Muenich, K.; Mulders, M.; Mundim, L.; Murray, W. J.; Muryn, B.; Myatt, G.; Myklebust, T.; Nassiakou, M.; Navarria, F. L.; Nawrocki, K.; Němeček, S.; Nicolaidou, R.; Niezurawski, P.; Nikolenko, M.; Nygren, A.; Obłąkowska-Mucha, A.; Obraztsov, V.; Olshevski, A. G.; Onofre, A.; Orava, R.; Österberg, K.; Ouraou, A.; Oyanguren, A.; Paganoni, M.; Paiano, S.; Palacios, J.; Pałka, H.; Papadopoulou, Th. D.; Pape, L.; Parkes, C.; Parodi, F.; Parzefall, U.; Passeri, A.; Passon, O.; Peralta, L.; Perepelitsa, V.; Perrotta, A.; Petrolini, A.; Piedra, J.; Pieri, L.; Pierre, F.; Pimenta, M.; Piotto, E.; Podobnik, T.; Poireau, V.; Pol, M. E.; Polok, G.; Poropat, P.; Pozdniakov, V.; Privitera, P.; Pukhaeva, N.; Pullia, A.; Rameš, J.; Ramler, L.; Read, A. L.; Rebecchi, P.; Rehn, J.; Reid, D.; Reinhardt, R.; Renton, P.; Richard, F.; Řídký, J.; Ripp-Baudot, I.; Rodriguez, D. Rodriguez; Romero, A.; Ronchese, P.; Rosenberg, E. I.; Roudeau, P.; Rovelli, T.; Ruhlmann-Kleider, V.; Ryabtchikov, D.; Sadovsky, A.; Salmi, L.; Salt, J.; Savoy-Navarro, A.; Schwanda, C.; Schwering, B.; Schwickerath, U.; Segar, A. M.; Sekulin, R.; Siebel, M.; Sisakian, A. N.; Smadja, G.; Smirnova, O.; Sokolov, A.; Sopczak, A.; Sosnowski, R.; Spassov, T.; Stanitzki, M. M.; Stocchi, A.; Strauss, J.; Stugu, B.; Szczekowski, M.; Szeptycka, M.; Szumlak, T.; Tabarelli, T.; Taffard, A.; Tegenfeldt, F.; Terranova, F.; Timmermans, J.; Tinti, N.; Tkatchev, L. G.; Tobin, M.; Todorovova, S.; Tomé, B.; Tonazzo, A.; Tortosa, P.; Trávničék, P.; Treille, D.; Tristram, G.; Trochimczuk, M.; Troncon, C.; Tyapkin, I. A.; Tyapkin, P.; Tzamarias, S.; Ullaland, O.; Uvarov, V.; Valenti, G.; Dam, P. Van; Eldik, J. Van; Lysebetten, A. Van; Remortel, N. Van; Vulpen, I. van; Vegni, G.; Veloso, F.; Vénus, W.; Verbeure, F.; Verdier, P.; Verzi, V.; Vilanova, D.; Vitale, L.; Vrba, V.; Wahlen, H.; Washbrook, A.; Weiser, C.; Wicke, D.; Wickens, J.; Wilkinson, G.; Winter, M.; Witek, M.; Yushchenko, O.; Zalewska, A.; Zalewski, P.; Zavrtanik, D.; Zimin, N. I.; Zintchenko, A.; Zoller, Ph.; Župan, M.

doi:10.1016/s0370-2693(03)00660-9

Cited by 47 publications

(61 citation statements)

References 12 publications

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“…In contrast to the LO analysis of Ref. [28], the DELPHI [17] data tend to systematically overshoot the NLO NRQCD result, albeit the deviation is by no means significant in view of the sizeable experimental errors. As is evident from Fig.…”

contrasting

confidence: 74%

“…It is the purpose of this Letter, to overcome this highly unsatisfactory situation jeopardizing the success of NRQCD factorization by performing a global fit to all available high-quality data of inclusive unpolarized J/ψ production, comprising a total of 194 data points from 26 data sets. Specifically, these include p T distributions in hadroproduction from PHENIX [9] at RHIC, CDF at Tevatron I [12] and Tevatron II [8], ATLAS [13], CMS [10], ALICE [14], and LHCb [15] at the LHC; p 2 T , W , and z distributions in photoproduction from ZEUS [16] and H1 [6] at HERA I and H1 [7] at HERA II; a p 2 T distribution in two-photon scattering from DELPHI [17] at LEP II; and a total cross section in e + e − annihilation from Belle [18] at KEKB.…”

mentioning

confidence: 99%

“…dσ(ee→J/ψ ee+X)/dp Our theoretical predictions refer to direct J/ψ production, as the data from Tevatron I [12] do, while the data from KEKB [18], Tevatron II [8], and LHC [10,13,14,15] comprise prompt events and those from LEP II [17], HERA [6,7,16], and RHIC [9] even non-prompt ones. However, the resulting error is small against our theoretical uncertainties and has no effect on our conclusions.…”

mentioning

confidence: 99%

“…Refitting the data with the estimated feed-down contribution subtracted yields O J/ψ ( 74. In conclusion, we performed a NLO NRQCD analysis of all available high-quality data of inclusive unpolarized J/ψ production, from KEKB [18], LEP II [17], RHIC [9], HERA I [6,16] and II [7], Tevatron I [12] and II [8], and the LHC [10,13,14,15], comprising a total of 194 data points from 26 data sets. The fit values of the CO LDMEs in Table 1 agree with our previous ones [4], extracted just from the p T distributions of Refs.…”

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confidence: 99%

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World data ofJ/ψproduction consolidate nonrelativistic QCD factorization at next-to-leading order

2011

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We calculate the cross sections of inclusive J/ψ production in photoproduction and two-photon scattering, involving both direct and resolved photons, and in e + e − annihilation at next-to-leading order (NLO) within the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), including the full relativistic corrections due to the intermediate 1 S J color-octet (CO) states. Exploiting also our previous results on hadroproduction, we perform a combined fit of the respective CO long-distance matrix elements (LDMEs) to all available highquality data of inclusive J/ψ production, from KEKB, LEP II, RHIC, HERA, the Tevatron, and the LHC, comprising a total of 194 data points from 26 data sets.

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contrasting

confidence: 74%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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World data ofJ/ψproduction consolidate nonrelativistic QCD factorization at next-to-leading order

2011

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“…These tend to produce much cleaner events than those produced in inelastic hadron collisions. They may also help to validate the only experimental analysis of quarkonium production in photon-photon collisions to date [24], which clearly required important color-octet contributions [25]. We therefore focus here on quarkonium production in photon-photon collisions at the LHC.…”

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confidence: 99%

Perspectives for inclusive quarkonium production in photon-photon collisions at the LHC

Klasen¹,

Lansberg²

2008

Nuclear Physics B - Proceedings Supplements

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6 pages, 4 figures. Invited talk given by J.P. Lansberg at the Workshop on "High-energy photon collisions at the LHC", April 22-25, 2008, CERN, Switzerland. To appear in the proceedingsInternational audienceWe report on the current status of knowledge on inclusive quarkonium production in high-energy photonphoton collisions. As a perspective for the LHC, we compute various production cross sections via direct photonphoton fusion in ultra-peripheral pp, pA and AA collisions at the LHC using the tree-level quarkonium amplitude generator MadOnia

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Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

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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 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 at BESIII, the LHC, RHIC, FAIR, the Super Flavor and/or Tau-Charm factories, JLab, the ILC, and beyond. The list of newly-found conventional states expanded to include hc(1P ), χc2(2P ), B + c , and η b (1S). In addition, the unexpected and still-fascinating X(3872) has been joined by * Editors † Section coordinators ‡ Corresponding author: bkh2@cornell.edu more than a dozen other charmonium-and bottomonium-like "XY Z" states that appear to lie outside the quark model. Many of these still need experimental confirmation. The plethora of new 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 cc, bb, and bc bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. Lattice QCD has grown from a tool with computational possibilities to an industrialstrength effort now dependent more on insight and innovation than pure computational power. New effective field theories for the description of quarkonium in different regimes have been developed and brought to a high degree of sophistication, thus enabling precise and solid theoretical predictions. Many expected decays and transitions have either been measured with precision or for the first time, but the confusing patterns of decays, both above and below open-flavor thresholds, endure and have deepened. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hotand 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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Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector

Cited by 47 publications

References 12 publications

World data ofJ/ψproduction consolidate nonrelativistic QCD factorization at next-to-leading order

World data ofJ/ψproduction consolidate nonrelativistic QCD factorization at next-to-leading order

Perspectives for inclusive quarkonium production in photon-photon collisions at the LHC

Heavy quarkonium: progress, puzzles, and opportunities

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