A technique to study the elastic and inelastic interaction of quarkonium with hadrons using femtoscopic correlations

Bahmani, M.; Kikoła, D. P.; Kosarzewski, L. K.

doi:10.1140/epjc/s10052-021-09088-7

Cited by 3 publications

(8 citation statements)

References 50 publications

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“…In the elastic scenario, J/ψ kinematics will be modified. Inelastically, J/ψ may be broken up [32]. As the J/ψ moves away from the charged particles, the comover effect in the final state is expected to diminish.…”

Section: Resultsmentioning

confidence: 99%

“…In the elastic scenario, J/ψ kinematics will be modified. Inelastically, J/ψ may possibly be broken up [32]. Hence, the final state comover effect may affect J/ψ production yield and will become more prominent at high levels of multiplicity.…”

mentioning

confidence: 99%

“…Hence, the final state comover effect may affect J/ψ production yield and will become more prominent at high levels of multiplicity. Experimentally, the final state comover effect can be studied by J/ψ-hadron femtoscopic correlation measurements [32]. Theoretically, FSI has also been implemented in the EPOS event generator [33].…”

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confidence: 99%

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Measurements of J/ψ Production vs. Event Multiplicity in Forward Rapidity in p + p Collisions in the PHENIX Experiment

Shi

2023

Universe

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J/ψ, a charmonium bound state made of a charm and an anti-charm quark, was discovered in the 1970s and confirmed the quark model. Because the mass of charm quarks is significantly above the quantum chromodynamics (QCD) scale ΛQCD, charmonia are considered excellent probes to test perturbative quantum chromodynamics (pQCD) calculations. In recent decades, they have been studied extensively at different high-energy colliders. However, their production mechanisms, which involve multiple scales, are still not very well understood. Recently, in high-multiplicity p+p collisions at RHIC and at the LHC, a significant enhancement of J/ψ production yield has been observed, which suggests a strong contribution of multi-parton interaction (MPI). This is different from the traditional pQCD picture, where charm quark pairs are produced from a single hard scattering between partons in p+p collisions. In this work, we will report the J/ψ normalized production yield as a function of normalized charged particle multiplicity over a board range of rapidity and event multiplicity in the J/ψ→μ+μ− channel with PHENIX Run 15 p+p data at s=200 GeV. The results are compared with PYTHIA 8 simulations with the MPI option turned on and off. Finally, the outlooks of J/ψ in p+Au and Au+p collisions, along with color glass condensate (CGC) predictions and the multiplicity-dependent ψ(2S)/J/ψ ratio in p+p data, will be briefly discussed.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Measurements of J/ψ Production vs. Event Multiplicity in Forward Rapidity in p + p Collisions in the PHENIX Experiment

Shi

2023

Universe

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“…A technique of measuring J/ψ-hadron femtoscopic correlations [15] allows to extract both inelastic and elastic cross sections for the interactions between J/ψ and hadrons from the data. It can be done by measuring J/ψhadron correlation function versus relative momentum of the J/ψ-hadron pair in the pair rest frame and fitting a final state interaction model to the data.…”

Section: Quarkonium-hadron Femtoscopymentioning

confidence: 99%

“…Various observables are studied, which include spectra, spin alignment(polarization), ratios and charged particle multplicity N ch dependence. New observables are also studied, which include associated quarkonium production, double quarkonium production and quarkonium-hadron femtoscopy [15]. These provide…”

Section: Introductionmentioning

confidence: 99%

Quarkonium production in p+p collisions at RHIC and LHC

Kosarzewski¹

2022

Phys. Scr.

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Quarkonium production mechanism is still an unresolved question. This paper provides an overview of recent quarkonium production studies performed at RHIC and LHC in p + p collisions at a wide range of collision energies. After a brief explanation of representative theoretical models, experimental results of the quarkonium spectra and polarizations are presented with comparison to the model calculations. The spectra are overall rather well described by production model calculations, with a few exceptions, while no significant polarization is observed beyond large uncertainties for J/ψ and Υ, and thus no constraint on the models is obtained at present. Recently, new observables have been measured such as charged particle multiplicity dependence of quarkonium production, which provides a way to understand the interplay between hard and soft processes, and associated production of quarkonium (J/ψ in jets and double production), which provides more information about production mechanism. A trend of non-linear increase of quarkonium production with increasing the particle multiplicity is observed both at RHIC and LHC, but it is reproduced by most models and further studies and more data are needed in order to differentiate them. Meanwhile, the first measurements of J/ψ in jets show that it is produced with larger activity within a jet than simulated by PYTHIA. A comment on the study of J/ψ-hadron femtoscopic correlations to measure their mutual interaction is also given. In summary, the production mechanism remains a puzzle, but more precise studies will be possible with upcoming RHIC and LHC runs.

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Measurements of J/ψ Production vs Event Multiplicity in the Forward Rapidity in p + p Collisions in the PHENIX Experiment

Shi¹

2023

Preprint

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J/ψ, a charmonium bound state made of a charm and an anti-charm quark, has been discovered in the 1970s and confirmed the quark model. Because the mass of charms quarks is significantly above the Quantum Chromodynamics (QCD) scale ΛQCD, charmonia are considered as excellent probes to test perturbative Quantum Chromodynamics (pQCD) calculations. Over the past decades, they have been studied extensively at different high energy colliders. However, their production mechanisms, which involves multiple scales, are still not very well understood. Recently, in high multiplicity p+p collisions at RHIC and at the LHC, a significant enhancement of J/ψ production yield has been observed, which suggests a strong contribution from the Multi-Parton Interaction (MPI). This is different from the traditional pQCD picture where charm quark pairs are produced from a single hard scattering between partons in p+p collisions. In this work, we will report the J/ψ normalized production yield as a function of normalized charged particle multiplicity over a board range of rapidity and event multiplicity in the J/ψ→μ+μ− channel with PHENIX Run 15 p+p data at \sqrt{s}=200 GeV. The results are compared with PYTHIA 8 simulations with the MPI option on and off. Finally, the outlooks of J/ψ in p+Au and Au+p collisions along with Color Glass Condensate (CGC) predictions and of multiplicity dependent ψ(2S)/J/ψ ratio in p+p data will be briefly discussed.

show abstract

A technique to study the elastic and inelastic interaction of quarkonium with hadrons using femtoscopic correlations

Cited by 3 publications

References 50 publications

Measurements of J/ψ Production vs. Event Multiplicity in Forward Rapidity in p + p Collisions in the PHENIX Experiment

Measurements of J/ψ Production vs. Event Multiplicity in Forward Rapidity in p + p Collisions in the PHENIX Experiment

Quarkonium production in p+p collisions at RHIC and LHC

Measurements of J/ψ Production vs Event Multiplicity in the Forward Rapidity in p + p Collisions in the PHENIX Experiment

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