Are the J/ψ and χc A dependencies the same?

Vogt, R.

doi:10.1016/s0375-9474(01)01313-6

Cited by 67 publications

(78 citation statements)

References 48 publications

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“…Nuclear shadowing and energy loss predict equal suppression of J/ψ and ψ(2S) mesons, and so cannot explain the observations. One explanation for the fixed-target results is that the charmonium states produced at central rapidity spend more time in the medium than those at forward rapidities; therefore the loosely bound ψ(2S) mesons are more easily suppressed than J/ψ mesons at central rapidity [22][23][24]. In this picture it is expected that the charmonium states will spend a much shorter time in the CNM at LHC energies than at lower energies, leading to similar suppression for ψ(2S) and J/ψ mesons even at central rapidity.…”

Section: Jhep03(2016)133mentioning

confidence: 99%

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

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The production of ψ(2S) mesons is studied in dimuon final states using protonlead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb −1 . The nucleon-nucleon centre-of-mass energy of the pPb collisions is √ s N N = 5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward production ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the bb cross-section in pPb collisions at √ s N N = 5 TeV is obtained.

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Section: Jhep03(2016)133mentioning

confidence: 99%

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

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“…This effect can modify the feed-down fractions in p+A collisions. On the other hand, if the cc is not formed as a color singlet, it can cross the nuclear matter as a colored preresonant state [86]. If this were true, the breakup cross section of J/ψ and ψ ′ should be the same and there would be no modification of the ψ ′ feed-down fraction in p+A collisions, whereas a possible modification can occur for the χ c since it is expected to be formed mainly as a color singlet.…”

Section: E Outcomes For Heavy Ion Collisionsmentioning

confidence: 99%

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Adare¹,

Afanasiev²,

Aidala³

et al. 2012

Phys. Rev. D

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We report on charmonium measurements [J/ψ (1S), ψ ′ (2S), and χc (1P)] in p+p collisions at √ s = 200 GeV. We find that the fraction of J/ψ coming from the feed-down decay of ψ ′ and χc in the midrapidity region (|y| < 0.35) is 9.6 ± 2.4% and 32 ± 9%, respectively. We also present the pT and rapidity dependencies of the J/ψ yield measured via dielectron decay at midrapidity (|y| < 0.35) and via dimuon decay at forward rapidity (1.2 < |y| < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.

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“…Another complication arises due to "cold nuclear matter effects," i.e., nuclear effects that are independent of temperature and that would occur even if no plasma were formed. There is ongoing controversy as to the nature of these effects, although there is agreement that they lead to suppression of quarkonium yield [20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…(21). We use Gauss units throughout the paper; note that the expressions eB, eE, and eB 0 are the same in Gauss and Lorentz-Heaviside units.…”

Section: Introductionmentioning

confidence: 99%

Quarkonium dissociation in quark-gluon plasma via ionization in a magnetic field

Marasinghe

Tuchin

2011

Phys. Rev. C

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We study the impact of a magnetic field, generated in collisions of relativistic heavy ions, on the decay probability of a quarkonium produced in the central rapidity region. The quark and antiquark components are subject to mutually orthogonal electric and magnetic fields in the quarkonium comoving frame. In the presence of an electric field, the quarkonium has a finite dissociation probability.We use theWKB approximation to derive the dissociation probability. We find that the quarkonium dissociation energy, i.e., the binding energy at which the dissociation probability is of order unity, increases with the magnetic field strength. It also increases with quarkonium momentum in the laboratory frame owing to the Lorentz boost of the electric field in the comoving frame. We argue that J/ψ's produced in heavy-ion collisions at the Large Hadron Collider with P⊥ > 9 GeV would dissociate even in vacuum. In plasma, the J/ψ dissociation in a magnetic field is much stronger because of the decrease of its binding energy with temperature.We discuss phenomenological implications of our results. Disciplines Astrophysics and Astronomy | Physics CommentsThis article is from Physical Review C 84 (2011) We study the impact of a magnetic field, generated in collisions of relativistic heavy ions, on the decay probability of a quarkonium produced in the central rapidity region. The quark and antiquark components are subject to mutually orthogonal electric and magnetic fields in the quarkonium comoving frame. In the presence of an electric field, the quarkonium has a finite dissociation probability. We use the WKB approximation to derive the dissociation probability. We find that the quarkonium dissociation energy, i.e., the binding energy at which the dissociation probability is of order unity, increases with the magnetic field strength. It also increases with quarkonium momentum in the laboratory frame owing to the Lorentz boost of the electric field in the comoving frame. We argue that J/ψ's produced in heavy-ion collisions at the Large Hadron Collider with P ⊥ > 9 GeV would dissociate even in vacuum. In plasma, the J/ψ dissociation in a magnetic field is much stronger because of the decrease of its binding energy with temperature. We discuss phenomenological implications of our results.

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Are the J/ψ and χc A dependencies the same?

Cited by 67 publications

References 48 publications

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Quarkonium dissociation in quark-gluon plasma via ionization in a magnetic field

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