Inclusive charm production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Υ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>n</mml:mi><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>decay

Kang, Daekyoung; Kim, Tae−Won; Lee, Jung-Il; Yu, Chaehyun

doi:10.1103/physrevd.76.114018

Cited by 24 publications

(22 citation statements)

References 30 publications

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“…BABAR also finds this rate to be considerably in excess (i.e., roughly double) of that expected from bb annihilation into a single photon. The excess is seen to be in agreement with a prediction [606] based on splitting a virtual gluon, but appears to be too small to accommodate an octet-state contribution [607].…”

Section: Observation Of υ(1s) → Antideuteron +Xsupporting

confidence: 75%

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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Section: Observation Of υ(1s) → Antideuteron +Xsupporting

confidence: 75%

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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“…3, manifest a clear excess over the expected single virtual photon contribution, evaluated from the measured D * ± fragmentation function at √ s = 10.5 GeV [16]. The excess is consistent with the rate and shape expected from the splitting for a single virtual gluon, (1.20 ± 0.29)% [17], and disfavors a substantial color octet contribution [18].…”

Section: Observation Of ϒ(1s) → X D * ±supporting

confidence: 56%

Studies of Bottomonium at B[sub A]B[sub AR]

West¹,

Credé²,

Eugenio³

et al. 2010

AIP Conference Proceedings

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Abstract. We present studies of the bottomonium spectrum using 122 million ϒ(3S) decays and 90 million ϒ(2S) decays collected with the BABAR detector operating at the PEP II asymmetric-energy storage rings at SLAC. These studies include the first observation of the η b meson and its confirmation, an energy scan between √ s = 10.54 and 11.20 GeV, and a measurement of the momentum distributions of open charm produced in ϒ(1S) decays.

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“…[1,2]. branching fractions and charm-momentum distributions for the inclusive charm production in Υ(nS) decays, which are being analyzed by the CLEO Collaboration [14]. The result listed in this paper can also be used to determine the NRQCD matrix elements for the 2S charmonium states.…”

Section: Numerical Resultsmentioning

confidence: 99%

Cornell Potential Parameters for S-Wave Heavy Quarkonia

Chung¹,

Lee²,

Kang³

2008

J. Korean Phy. Soc.

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We compute derived quantities for various values of the model parameter of the Cornell potential model for the S-wave heavy quarkonia with radial quantum numbers n = 1, 2, and 3. Our results can be used to determine leading and relative-order-v 2 nonrelativistic quantum chromodynamics matrix elements for S-wave charmonia and bottomonia such as ψ(2S), η c (2S), and Υ(nS) for n = 1, 2, and 3. These matrix elements will be essential ingredients for resumming relativistic corrections to processes involving those S-wave heavy quarkonium states.

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Inclusive charm production inΥ(nS)decay

Cited by 24 publications

References 30 publications

Heavy quarkonium: progress, puzzles, and opportunities

Heavy quarkonium: progress, puzzles, and opportunities

Studies of Bottomonium at B[sub A]B[sub AR]

Cornell Potential Parameters for S-Wave Heavy Quarkonia

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