Charmonium production from hot hadronic matter

Ko, Che Ming; Wang, X.N.; Zhang, Bruce; Zhang, X.F.

doi:10.1016/s0370-2693(98)01390-2

Cited by 49 publications

(37 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The secondary charmonium bound states are produced almost entirely during the mixed phase. This is in contrast to [3]. In fig.…”

Section: Model For Expansion Dynamicsmentioning

confidence: 75%

“…Increasing the transverse expansion parameter from 0.15 to 0.45 in eq.6 decreases the total number of ψ , produced during the mixed phase by 40 %. Taking a quadratic dependence of R(τ ) on proper time as proposed in [3] decreases the yield of ψ , from 0.08 to 0.036, which is still comparable with the number of primary ψ , .…”

Section: Time Evolution Of the Charmonium Abundancesmentioning

confidence: 91%

“…The initially produced cc pairs in hard parton scattering, however, due to charm conservation, will survive in the deconfined medium until the system reaches the critical temperature where the charm quarks hadronize, forming predominately D andD mesons. An appreciable fraction of cc pairs and consequently D,D mesons produced in Pb-Pb collisions at LHC energy can lead to an additional production of charmonium bound states due to reactions such as: DD * + D * D + D * D * → ψ + π and D * D * + DD → ψ + ρ as first indicated in [3]. In this work we present a quantitative description of the secondary J/ψ and ψ , production due to the above processes from the thermal hadronic medium created in Pb-Pb collisions at LHC energy.…”

Section: Secondary Charmonium Productionmentioning

confidence: 97%

See 2 more Smart Citations

Charmonium production from secondary collisions at LHC energy

Braun‐Munzinger¹,

Redlich

2000

Eur. Phys. J. C

View full text Add to dashboard Cite

We consider the charmonium production in thermalized hadronic medium created in ultrarelativistic heavy ion collisions at LHC energy. The calculations for the secondary J/ψ and ψ , production by DD annihilation are performed within a kinetic model taking into account the space-time evolution of a longitudinally and transversely expanding medium. We show that the secondary charmonium production appears almost entirely during the mixed phase and it is very sensitive to the charmonium dissociation cross section with co-moving hadrons. Within the most likely scenario for the dissociation cross section of the J/ψ mesons their regeneration in the hadronic medium will be negligible. The secondary production of ψ , mesons however, due to their large cross section above the threshold, can substantially exceed the primary yield.

show abstract

“…The secondary charmonium bound states are produced almost entirely during the mixed phase. This is in contrast to [3]. In fig.…”

Section: Model For Expansion Dynamicsmentioning

confidence: 75%

Section: Time Evolution Of the Charmonium Abundancesmentioning

confidence: 91%

Section: Secondary Charmonium Productionmentioning

confidence: 97%

See 1 more Smart Citation

Charmonium production from secondary collisions at LHC energy

Braun‐Munzinger¹,

Redlich

2000

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…The case of absorption appears when the imaginary part is Im[ω 2 (T )] < 0. The regeneration scenario [31,32,34,35,36,37,38] corresponds to Im[ω 2 (T )] > 0 in the THO model which stems from the coupling of the charmonium hamiltonian to open charm channels. In addition we shall consider a gaussian wave function for initial QQ state.…”

Section: (T )] + I Im[ω 2 (T )]mentioning

confidence: 99%

“…Once the partial densities of open charm mesons becomes nonnegligible, also the reverse processes of charmonium regeneration in channels like, e.g., D +D → J/ψ + ρ will occur. J/ψ re-generation shall give important contributions to charmonium production in heavy-ion collisions already at RHIC [31,32,33,34,35,36] and the more at the LHC [37,38]. The situation is well summarized in two recent reviews [39,40].…”

Section: Introductionmentioning

confidence: 99%

Quantum mechanical model for J/ψ suppression in the LHC era

Peña

Blaschke

2014

Nuclear Physics A

View full text Add to dashboard Cite

We discuss the interplay of screening, absorption and regeneration effects, on the quantum mechanical evolution of quarkonia states, within a time-dependent harmonic oscillator (THO) model with complex oscillator strength. We compare the results with data for R AA /R AA (CNM) from CERN and RHIC experiments. In the absence of a measurement of cold nuclear matter (CNM) effects at LHC we estimate their role and interpret the recent data from the ALICE experiment. We also discuss the temperature dependence of the real and imaginary parts of the oscillator frequency which stand for screening and absorption/regeneration, respectively. We point out that a structure in the J/ψ suppression pattern for In-In collisions at SPS is possibly related to the recently found X(3872) state in the charmonium spectrum. Theoretical support for this hypothesis comes from the cluster expansion of the plasma Hamiltonian for heavy quarkonia in a strongly correlated medium.

show abstract

Heavy quark measurements with ALICE

Crochet

2002

EPJ direct

View full text Add to dashboard Cite

IntroductionThe LHC heavy ion physics program aims at investigating the properties of strongly interacting matter at extreme energy density where the formation of the Quark Gluon Plasma (QGP) is expected [1]. Among the most promising observables, heavy quarkonium states are especially relevant since they provide, via their leptonic decays, an essential probe of the earliest and hottest stages of heavy ion collisions. From the early predictions of charmonium suppression by Debye screening in a deconfined medium [2] to the recent results from the NA50 collaboration [3], a lot of effort has been devoted to the subject (for reviews see [4,5]). The LHC energy is ideal for a spectroscopy of the whole set of resonances. In particular, because a much higher temperature than that expected to be reached at RHIC is needed to dissolve the Υ meson, the spectroscopy of the Υ family at LHC energies should reveal an unique set of information on the characteristics of the QGP [6]. On the other hand, the study of heavy quark resonances at the LHC is subject to significant differences with respect to the SPS energies. First of all the signals will be sitting on top of a complex combinatorial background, mainly coming from open charm and open bottom decay [7]. Then, in addition to prompt charmonia produced "directly" via hard scattering, secondary charmonia can be produced from bottom decay [8], DD annihilation [9, 10] and statistical hadronization [11,12,13]. Furthermore, the SPS results have demonstrated that the study of onium suppression must be closely joined to the study of open heavy flavours because both open and hidden quarkonia arise from the same underlying production mechanism. Although it is commonly admitted that, at the LHC, a large production rate of cc and bb pairs is expected 1 , the present estimations for heavy flavour production in nucleon-nucleon collisions are subject to some 1 Up to 115 cc and 5 bb should to be produced per central (5% of the total cross-section) PbPb collision [14].

show abstract

Charmonium production from hot hadronic matter

Cited by 49 publications

References 25 publications

Charmonium production from secondary collisions at LHC energy

Charmonium production from secondary collisions at LHC energy

Quantum mechanical model for J/ψ suppression in the LHC era

Heavy quark measurements with ALICE

Contact Info

Product

Resources

About