Color-octet quarkonia production

Cho, Peter; Leibovich, Adam K.

doi:10.1103/physrevd.53.150

Cited by 468 publications

(509 citation statements)

References 28 publications

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“…The corresponding differential cross sections can be found in [8,9]. We conclude from our simulation that gluon-gluon fusion actually stands for the dominant process as expected, gluon-quark scattering contributes appreciably, whereas quark-antiquark scattering represents a tiny contribution.…”

Section: Extraction Of Nrqcd Matrix Elements From Tevatron Datamentioning

confidence: 52%

“…Let us look below in some detail at the way hadronization is folded with the partonic description of hadrons, focusing for concreteness on the couple of related papers [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…In the first paper [8], Cho and Leibovich considered for charmonium production (in addition to the CSM) the 3 S 1 coloured intermediate state as a first approach, computing the squared amplitudes as products of perturbative parts standing for the short-distance partonic processes, and the colour-octet matrix element concerning the long-distance hadronization. Finally, a convolution of concrete parton distribution functions and the differential cross-section for the QQ production subprocess was performed, whereby the p t dependence of the charmonia production exclusively coming from the latter.…”

Section: Introductionmentioning

confidence: 99%

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production at the LHC

Cano-Coloma

Sanchis-Lozano

1997

Physics Letters B

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We firstly re-examine hadroproduction of prompt J/ψ's at the Fermilab Tevatron finding that those colour-octet matrix elements presented in literature are systematically overestimated due to the overlooking of the effective primordial transverse momentum of partons (i.e. dynamically generated via initial-state radiation). We estimate the size of these effects using different parton distribution functions in a Monte Carlo framework. Finally, we extrapolate up to LHC energies making a prediction on the expected p t differential cross-section for charmonium.

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Section: Extraction Of Nrqcd Matrix Elements From Tevatron Datamentioning

confidence: 52%

“…Let us look below in some detail at the way hadronization is folded with the partonic description of hadrons, focusing for concreteness on the couple of related papers [8,9].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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production at the LHC

Cano-Coloma

Sanchis-Lozano

1997

Physics Letters B

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“…Higher Fock components in the wavefunction have additional partons and are suppressed by positive powers of the small parameter v. In our calculation we will take into account both color-singlet and color-octet QQ contributions in the production. The NRQCD formalism has been used to calculate differential yields of heavy mesons as a function of their transverse momentum, p T , in p+p collisions [12][13][14][15][16]. The picture of the production process in NRQCD is as follows.…”

Section: Introductionmentioning

confidence: 99%

High transverse momentum quarkonium production and dissociation in heavy ion collisions

2013

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We calculate the yields of quarkonia in heavy ion collisions at RHIC and the LHC as a function of their transverse momentum. Based upon non-relativistic quantum chromodynamics, our results include both color-singlet and color-octet contributions and feed-down effects from excited states. In reactions with ultra-relativistic nuclei, we focus on the consistent implementation of dynamically calculated nuclear matter effects, such as coherent power corrections, cold nuclear matter energy loss, and the Cronin effect in the initial state. In the final state, we consider radiative energy loss for the color-octet state and collisional dissociation of quarkonia as they traverse through the QGP. Theoretical results are presented for J/ψ and Υ and compared to experimental data where applicable. At RHIC, a good description of the high-pT J/ψ modification observed in central Cu+Cu and Au+Au collisions can be achieved within the model uncertainties. We find that measurements of J/ψ yields in proton-nucleus reactions are needed to constrain the magnitude of cold nuclear matter effects. At the LHC, a good description of the experimental data can be achieved only in mid-central and peripheral Pb+Pb collisions. The large five-fold suppression of prompt J/ψ in the most central nuclear reactions may indicate for the first time possible thermal effects at the level of the quarkonium wavefunction at large transverse momenta.

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“…Using approximate values for the NRQCD matrix elements satisfying the restrictions imposed by heavy quark symmetry and compatible with the existing extractions [69,71, 721 the behavior of differential cross section can be studied. The energy dependence of the total cross section, taken at various representative incident neutrino energies, is shown in Table 3.1.…”

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confidence: 99%

The potential for neutrino physics at muon colliders and dedicated high current muon storage rings

et al. 2002

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Abstract:Conceptual design studies are underway for both muon colliders and highcurrent non-colliding muon storage rings that have the potential to become the first true "neutrino factories*. Muon decays in long straight sections of the storage rings would produce uniquely intense and precisely characterized twocomponent neutrino beams -. muon neutrinos plus electron antineutrinos from negative muon decays and electron neutrinos plus muon antineutrinos from positive muons. This article presents a long-term overview of the prospects for these facilities to greatly extend our capabilities for accelerator-based neutrino physics studies for both high rate and long baseline neutrino experiments. As the first major physics topic, recent experimental result.s involving neutrino oscillations have motivated a vigorous design effort towards dedicated neutrino factories that would store muon beams of energies 50 GeV or below. These facilities hold the promise of neutrino oscillation experiments with baselines up to intercontinental distances and utilizing well understood beams that contain, for the first time, a substantial component of multi-GeV electron-flavored neutrinos. In deference to the active and S&-moving nature of neutrino oscillation studies, the discussion of long baseline physics at neutrino factories has been limited to a concise general overview of the relevant theory, detector technologies, beam properties, experimental goaks and potential physics capabilities. The remainder of the article is devoted to the complementary high rate neutrino experiments that would study neutrino-nucleon and neutrino-electron scattering and would be performed at high performance detectors placed as close as is practical to the neutrino production straight section of muon storage rings in order to exploit beams with transverse dimensions as small as a few tens of centimeters.Icontact author, email: bkingQ!bnl.gov .

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Color-octet quarkonia production

Cited by 468 publications

References 28 publications

production at the LHC

production at the LHC

High transverse momentum quarkonium production and dissociation in heavy ion collisions

The potential for neutrino physics at muon colliders and dedicated high current muon storage rings

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