An effective theory of quarkonia in QCD matter

Makris, Yiannis; Vitev, Ivan

doi:10.1007/jhep10(2019)111

Cited by 22 publications

(23 citation statements)

References 81 publications

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“…Theory, phenomenology, and experimental measurements of quarkonia have gone a long way since the early investigation of J/ψ production in fixed target experiments at CERN and the works by Gavin, Gyulassy and Jackson. In these proceedings I reported on the derivation of the leading and sub-leading Lagrangians of NRQCD G for a single virtual gluon exchange [10]. This was achieved using three different approaches: i) the background field method, ii) a matching (with QCD) procedure, and iii) a hybrid method.…”

Section: Discussionmentioning

confidence: 99%

“…In Ref. [10] we revisited this conjecture making use of the leading power (LP) factorization of NRQCD [17,18], which is expected to hold at high transverse momenta (p T m Q ). In this limit the production cross section is factorized into short distance matching coefficients that describe the production and propagation of a parton k and the NRQCD fragmentation functions,…”

Section: Energy Loss Approach To Quarkonium Productionmentioning

confidence: 99%

“…The details of the derivation of the NRQCD G Lagrangian using the three different methods discussed above can be found in our paper [10]. We summarize the leading and subleading terms in the Lagrangian that arise from the heavy quark sector coupling to the medium, i.e.…”

Section: The Lagrangian Of Nrqcd Gmentioning

confidence: 99%

“…If we consider the non-relativistic limit of the t-channel gluon exchange diagram for a particular source, in addition to the above rules we obtain explicit expressions for the Glauber and Coulomb fields A µ,a G , A µ,a C . The interested reader can find those results in [10].…”

Section: The Lagrangian Of Nrqcd Gmentioning

confidence: 99%

“…As in the vacuum, production of quarkonia in nuclear matter remains a multi-scale problem. We have recently demonstrated that one can generalize NRQCD to incorporate interactions of the non-relativistic heavy quarks with the medium [10]. This was achieved by incorporating the Glauber and Coulomb gluon exchanges of the heavy quarks with the quasiparticles of QCD matter.…”

Section: Introductionmentioning

confidence: 99%

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Toward an effective theory of quarkonium production nuclear matter

Vitev¹

2019

Proceedings of 13th International Workshop in High pT Physics in the RHIC and LHC Era — PoS(High-pT2019)

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These proceedings are dedicated to Miklos Gyulassy's 70 th birthday. In his long and distinguished career he has made seminal contributions to many areas of heavy ion theory, including early papers on quarkonium phenomenology in fixed-target heavy ion experiments. Theoretical and experimental studies of the J/ψ and ϒ states have evolved considerably in the past decades, and I describe a recent generalization of non-relativistic Quantum Chromodynamics to include interactions in a generic nuclear medium. NRQCD with Glauber gluons aims to provide a universal microscopic description of the interaction of heavy quarkonia in a range of phases that include cold nuclear matter, dense hadron gas, and quark-gluon plasma. Such effective field theory is an important step toward understanding the common trends in proton-nucleus and nucleus-nucleus data on quarkonium suppression.

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Section: Discussionmentioning

confidence: 99%

Section: Energy Loss Approach To Quarkonium Productionmentioning

confidence: 99%

Section: The Lagrangian Of Nrqcd Gmentioning

confidence: 99%

Section: The Lagrangian Of Nrqcd Gmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward an effective theory of quarkonium production nuclear matter

Vitev¹

2019

Proceedings of 13th International Workshop in High pT Physics in the RHIC and LHC Era — PoS(High-pT2019)

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Quarkonium semiclassical transport in quark-gluon plasma: factorization and quantum correction

Yao

Mehen

2021

J. High Energ. Phys.

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We study quarkonium transport in the quark-gluon plasma by using the potential nonrelativistic QCD (pNRQCD) effective field theory and the framework of open quantum systems. We argue that the coupling between quarkonium and the thermal bath is weak using separation of scales, so the initial density matrix of the total system factorizes and the time evolution of the subsystem is Markovian. We derive the semiclassical Boltzmann equation for quarkonium by applying a Wigner transform to the Lindblad equation and carrying out a semiclassical expansion. We resum relevant interactions to all orders in the coupling constant at leading power of the nonrelativistic and multipole expansions. The derivation is valid for both weakly coupled and strongly coupled quark-gluon plasmas. We find reaction rates in the transport equation factorize into a quarkonium dipole transition function and a chromoelectric gluon distribution function. For the differential reaction rate, the definition of the momentum dependent chromoelectric gluon distribution function involves staple-shaped Wilson lines. For the inclusive reaction rate, the Wilson lines collapse into a straight line along the real time axis and the distribution becomes momentum independent. The relation between the two Wilson lines is analogous to the relation between the Wilson lines appearing in the gluon parton distribution function (PDF) and the gluon transverse momentum dependent parton distribution function (TMDPDF). The centrality dependence of the quarkonium nuclear modification factor measured by experiments probes the momentum independent distribution while the transverse momentum dependence and measurements of the azimuthal angular anisotropy may be able to probe the momentum dependent one. We discuss one way to indirectly constrain the quarkonium in-medium real potential by using the factorization formula and lattice calculations. The leading quantum correction to the semiclassical transport equation of quarkonium is also worked out. The study can be easily generalized to quarkonium transport in cold nuclear matter, which is relevant for quarkonium production in eA collisions in the future Electron-Ion Collider.

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Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at $$ \sqrt{s_{\textrm{NN}}} $$ = 5.02 TeV

Acharya,

Adamová,

Aglieri Rinella

et al. 2024

J. High Energ. Phys.

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The transverse momentum (pT) and centrality dependence of the nuclear modification factor RAA of prompt and non-prompt J/ψ, the latter originating from the weak decays of beauty hadrons, have been measured by the ALICE collaboration in Pb–Pb collisions at $$ \sqrt{s_{\textrm{NN}}} $$ s NN = 5.02 TeV. The measurements are carried out through the e+e− decay channel at midrapidity (|y| < 0.9) in the transverse momentum region 1.5 < pT < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a significant suppression for pT > 5 GeV/c, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping pT intervals, and cover the kinematic region down to pT = 1.5 GeV/c at midrapidity, not accessible by other LHC experiments. The suppression of prompt J/ψ in central and semicentral collisions exhibits a decreasing trend towards lower transverse momentum, described within uncertainties by models implementing J/ψ production from recombination of c and $$ \overline{\textrm{c}} $$ c ¯ quarks produced independently in different partonic scatterings. At high transverse momentum, transport models including quarkonium dissociation are able to describe the suppression for prompt J/ψ. For non-prompt J/ψ, the suppression predicted by models including both collisional and radiative processes for the computation of the beauty-quark energy loss inside the quark-gluon plasma is consistent with measurements within uncertainties.

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An effective theory of quarkonia in QCD matter

Cited by 22 publications

References 81 publications

Toward an effective theory of quarkonium production nuclear matter

Toward an effective theory of quarkonium production nuclear matter

Quarkonium semiclassical transport in quark-gluon plasma: factorization and quantum correction

Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at $$ \sqrt{s_{\textrm{NN}}} $$ = 5.02 TeV

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