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Lin, Z. H.; Zhu, Guohuai

doi:10.1016/j.physletb.2004.07.037

Cited by 17 publications

(7 citation statements)

References 29 publications

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“…It is desirable to extend the theoretical framework developed in [39,45,46] beyond the LO in v, to see whether such type of soft endpoint logarithms can be resummed to all orders in α s , to render the J/ψ energy spectrum well-behaved in the end point region.…”

Section: Discussion and Summarymentioning

confidence: 99%

“…It simply signals the breakdown of the NRQCD expansion near the kinematic boundary, as a result we should no longer trust our prediction in this region. Recall that for the NLO perturbative correction to the same process, the logarithmic singularity of ln(1 + r − z) is also expected to appear near the maximum of J/ψ energy [45,46]. However, it is worth mentioning that, the ln(1 + r − z) has rather different origin for both types of corrections.…”

Section: A Choice Of Input Parametersmentioning

confidence: 95%

“…3 The end-point collinear logarithms in the color-singlet channel has been resummed, but its impact on the J/ψ spectrum seems rather insignificant [45,46]. 4 However, although including NLO QCD correction helps to get the right answer for the inclusive production rate and energy spectrum of J/ψ in e + e − → J/ψ + X cc , it was noted that even [44], it is still difficult to reproduce the measured J/ψ polarization and angular distribution.…”

Section: +015mentioning

confidence: 99%

“…Therefore it is natural to identify this resulting ln(1 + r − z) with the soft origin. It is interesting to ask whether the method presented in [45,46], which combine NRQCD and the soft-collinear effective theory, can be generalized to resum those types of logarithm in (53) to all orders in α s , to render the J/ψ energy spectrum well-behaved near the end point region.…”

Section: A Choice Of Input Parametersmentioning

confidence: 99%

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Color-singlet relativistic correction to inclusiveJ/ψproduction associated with light hadrons atBfactories

Jia

2010

Phys. Rev. D

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We study the first-order relativistic correction to the associated production of J/ψ with light hadrons at B factory experiments at √ s = 10.58 GeV, in the context of NRQCD factorization.We employ a strategy for NRQCD expansion that slightly deviates from the orthodox doctrine, in that the matching coefficients are not truly of "short-distance" nature, but explicitly depend upon physical kinematic variables rather than partonic ones. Our matching method, with validity guaranteed by the Gremm-Kapustin relation, is particularly suited for the inclusive quarkonium production and decay processes with involved kinematics, exemplified by the process e + e − → J/ψ + gg considered in this work. Despite some intrinsic ambiguity affiliated with the orderv 2 NRQCD matrix element, if we choose its value as what has been extracted from a recent Cornell-potential-model-based analysis, including the relative order-v 2 effect is found to increase the lowest-order prediction for the integrated J/ψ cross section by about 30%, and exert a modest impact on J/ψ energy, angular and polarization distributions except near the very upper end of the J/ψ energy. The order-v 2 contribution to the energy spectrum becomes logarithmically divergent at the maximum of J/ψ energy. A consistent analysis may require that these large end-point logarithms be resummed to all orders in α s .

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Section: Discussion and Summarymentioning

confidence: 99%

Section: A Choice Of Input Parametersmentioning

confidence: 95%

Section: +015mentioning

confidence: 99%

Section: A Choice Of Input Parametersmentioning

confidence: 99%

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Color-singlet relativistic correction to inclusiveJ/ψproduction associated with light hadrons atBfactories

Jia

2010

Phys. Rev. D

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“…[807] used soft-collinear effective theory (SCET) to resum the color-octet contribution to the J/ψ inclusive cross section, the authors of Ref. [808] used SCET to analyze the color-singlet contribution to e + e − → J/ψ + gg, and the authors of Ref. [809] resummed the LO and NLO logarithms in the color-singlet contribution to the J/ψ inclusive cross section.…”

Section: Experiments and Lo Theoretical Expectationsmentioning

confidence: 99%

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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Overview of Non-Relativistic QCD

Soto

The IVth International Conference on Quarks and Nuclear Physics

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Leading power SCET analysis of e+e−→J/ψgg

Cited by 17 publications

References 29 publications

Color-singlet relativistic correction to inclusiveJ/ψproduction associated with light hadrons atBfactories

Color-singlet relativistic correction to inclusiveJ/ψproduction associated with light hadrons atBfactories

Heavy quarkonium: progress, puzzles, and opportunities

Overview of Non-Relativistic QCD

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