J/ψ and ψ′ production at the CERN p̄p collider

Albajar, C.; Albrow, M.; Allkofer, O. C.; Ankoviak, K.; Apsimon, R.; Aubert, B.; Bacci, C.; Bartha, S.; Bauer, G.; Bettini, A.; Bézaguet, A.; Biddulph, P.; Böhn, H.; Böhrer, A.; Bonino, R.; Bos, K.; Botlo, M.; Brockhausen, D.; Buchanan, C.; Buschbeck, B.; Busetto, G.; Caner, A.; Casoli, P.; Castilla‐Valdez, H.; Cavanna, F.; Cennini, P.; Centro, S.; Ceradini, F.; Ciapetti, G.; Cittolin, S.; Clayton, E. F.; Cline, D.; Colás, J.; Conte, R.; Coughlan, J. A.; Dau, D.; Daum, D.; Negra, M. Della; Demoulin, M.; Denegri, D.; Dibon, H.; Diciaccio, A.; Hedo, F. J. Diez; Dobrzynzki, L.; Dorenbosch, J.; Dowell, J. D.; Drijard, D.; Eggert, K.; Eisenhandler, E.; Ellis, N.; Evans, H.; Faissner, H.; Felcini, M.; Fensome, I. F.; Ferrando, A.; Forston, L.; Fuess, T. A.; Garvey, J.; Geiser, A.; Givernaud, A.; Gonidec, A.; Gonzales, Amanda; Gregory, Jonathan M.; Gronberg, J.; Holthuizen, D.; Jank, W.; Jorat, G.; Josa, M. I.; Kalmus, P. I. P.; Karimäki, V.; Kenyon, I. R.; Kinnunen, R.; Krammer, M.; Kryn, D.; Lacava, F.; Lammel, S.; Landon, M. P. J.; Lemoigne, Y.; Levegrün, S.; Linglin, D.; Lipa, P.; Markou, C.; Markytan, M.; Marquina, M. A.; Martinelli, R.; Maurin, G.; McMahon, S. J.; Mendiburu, J. P.; Meneguzzo, A. T.; Merlo, J.-P.; Meyer, T. C.; Moers, T.; Mohammadi, M.; Morgan, K.; Morsch, A.; Moulin, André; Müller, Th.; Muñoz, Raúl C.; Naumann, L.; Nédélec, P.; Nikitas, M.; Nisati, A.; Norton, A.; O’Dell, V.; Otwinowski, S.; Pancheri, G.; Passaseo, M.; Pauß, F.; Petrolo, E.; Mortari, G. Piano; Pietarinen, E.; Pimiä, M.; Placci, A.; Pontecorvo, L.; Porte, J. P.; Priem, Richard L.; Prosi, P.; Radermacher, E.; Rauschkolb, M.; Reithler, H.; Revol, J. P.; Robins, S. A.; Robinson, D.; Rodrigo, T.; Rohlf, J.; Rubbia, C.; Sajot, G.; Salicio, J.; Samyn, D.; Schinzel, D.; Schleichert, R.; Schröder, M.; Seez, C.; Shah, T.; Sphicas, P.; Stork, D. H.; Stubenrauch, C.; Sumorok, K.; Szoncsó, F.; Tan, C.H.; Taurok, A.; Taylor, L.; Tether, S.; Teykal, H.; Thompson, G.; Torrente-Luján, E.; Tuchscherer, H.; Tuominiemi, J.; Guchte, W. van de; Dijk, Albert van; Vargas, M.; Veneziano, S.; Vialle, J.P.; Virdee, T.; Schlippe, W. von; Vrána, J.; Vuillemin, V.; Wacker, K.; Wagner, Hermann; Wu, X.; Wulz, C.-E.; Yvert, M.; Zacharov, I.; Zanello, L.; Zolnierowski, Y.; Zotto, P.

doi:10.1016/0370-2693(91)90227-h

Cited by 66 publications

(56 citation statements)

References 23 publications

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“…(GeV) s [73], NA50/51 [74,75]) p+p (ISR [66], this result), and p+p (UA1 [64], CDF [9]) collisions. The dashed (blue) line shows the CEM calculation [52].…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 93%

“…The NRQCD includes color singlet and color octet states, and as mentioned at the beginning of this section, cannot be extrapolated to low p T to obtain the rapidity distribution without the addition of an empirical constraint. Figure 23 shows the the (a) p T and (b) x T = 2p T / √ s dependence of the dielectron differential cross section at midrapidity, compared to other p+p and p +p experiments [9,21,[64][65][66]. The shapes of the transverse momentum distributions in Fig.…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 97%

“…A pure LO process leads to n = 4, hence, NLO terms may be important in J/ψ production [68][69][70][71]. [9,21], UA1 [64], PHENIX (this work), STAR [65], and ISR [66] at y ∼ 0.…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 99%

“…8-b) is consistent with that observed in other experiments. Figure 25 shows the collision-energy dependence of the ψ ′ /(J/ψ) yield ratio in low-atomic-mass fixedtarget p+A, p+p , and p+p [9,64,66,[73][74][75] collisions. The ratios from p +p experiments were calculated using the reported J/ψ and ψ ′ cross sections for p T > 5 GeV/c together with their point-to-point uncorrelated uncertainties 3 .…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 99%

See 3 more Smart Citations

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Adare¹,

Afanasiev²,

Aidala³

et al. 2012

Phys. Rev. D

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We report on charmonium measurements [J/ψ (1S), ψ ′ (2S), and χc (1P)] in p+p collisions at √ s = 200 GeV. We find that the fraction of J/ψ coming from the feed-down decay of ψ ′ and χc in the midrapidity region (|y| < 0.35) is 9.6 ± 2.4% and 32 ± 9%, respectively. We also present the pT and rapidity dependencies of the J/ψ yield measured via dielectron decay at midrapidity (|y| < 0.35) and via dimuon decay at forward rapidity (1.2 < |y| < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.

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“…(GeV) s [73], NA50/51 [74,75]) p+p (ISR [66], this result), and p+p (UA1 [64], CDF [9]) collisions. The dashed (blue) line shows the CEM calculation [52].…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 93%

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 97%

“…A pure LO process leads to n = 4, hence, NLO terms may be important in J/ψ production [68][69][70][71]. [9,21], UA1 [64], PHENIX (this work), STAR [65], and ISR [66] at y ∼ 0.…”

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 99%

Section: B Total Cross Section Of Inclusive J/ψmentioning

confidence: 99%

See 2 more Smart Citations

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Adare¹,

Afanasiev²,

Aidala³

et al. 2012

Phys. Rev. D

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“…But the value is not unique, since it may change with different choice of the parameters such as M 0 and ξ max in Eq. (18). If we use the central value of D = 0.18 ± 0.04 measured by the CDF Collaboration at the Tevatron, the predicted ratio in the forward region R f wd.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

AssociatedJ/ψ+γdiffractive production: The nature of the Pomeron and a test of hard diffractive factorization

Hong-an

1998

Phys. Rev. D

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We present a study of diffractive associated J/ψ + γ production at the Fermilab Tevatron and LHC based on the Ingelman-Schlein model for hard diffractive scattering and the factorization formalism of NRQCD for quarkonia production. we find that this process (p +p → p + J/ψ + γ + X) can be used to probe the gluon content of the Pomeron and test the assumption of diffractive hard scattering factorization. Using the renormalized Pomeron flux factor D ≃ 0.11(0.052) , the single diffractive J/ψ + γ production cross section at 4 < P T < 10 GeV , −1 < η < 1 region is found to be of the order of 3.0pb (8.5 pb ). The ratio of single diffractive to inclusive production is 0.50%(0.15%) in central region at the Tevatron (LHC) for the gluon fraction in the Pomeron f g = 0.7, independent of the values of color-octet matrix elements. PACS number(s): 12.40Nn, 13.85.Ni, 14.40.Gx

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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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J/ψ and ψ′ production at the CERN p̄p collider

Cited by 66 publications

References 23 publications

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

AssociatedJ/ψ+γdiffractive production: The nature of the Pomeron and a test of hard diffractive factorization

Heavy quarkonium: progress, puzzles, and opportunities

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