Pion interferometry and resonances in pp and AA collisions

Padula, Sandra S.; Gyulassy, Miklós

doi:10.1016/0375-9474(92)90614-p

Cited by 9 publications

(10 citation statements)

References 17 publications

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“…However, this sample contains hadron pairs from the decay of resonances such as , which are not present in the like-sign combinations. These contribute to the low- Q region and can give a spurious BEC signature with a large effective radius of the source [57–63]. …”

Section: Discussionmentioning

confidence: 99%

Two-particle Bose–Einstein correlations in pp collisions at $$\mathbf {\sqrt{s} =}$$ s = 0.9 and 7 TeV measured with the ATLAS detector

Aad¹,

Abbott²,

Abdallah³

et al. 2015

Eur. Phys. J. C

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The paper presents studies of Bose–Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range 100 MeV and 2.5 in proton collisions at centre-of-mass energies of 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. The integrated luminosities are approximately 7 b, 190 b and 12.4 nb for 0.9 TeV, 7 TeV minimum-bias and 7 TeV high-multiplicity data samples, respectively. The multiplicity dependence of the BEC parameters characterizing the correlation strength and the correlation source size are investigated for charged-particle multiplicities of up to 240. A saturation effect in the multiplicity dependence of the correlation source size parameter is observed using the high-multiplicity 7 TeV data sample. The dependence of the BEC parameters on the average transverse momentum of the particle pair is also investigated.

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Section: Discussionmentioning

confidence: 99%

Two-particle Bose–Einstein correlations in pp collisions at $$\mathbf {\sqrt{s} =}$$ s = 0.9 and 7 TeV measured with the ATLAS detector

Aad¹,

Abbott²,

Abdallah³

et al. 2015

Eur. Phys. J. C

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“…There are several effects which may reduce the strength of the time-delay signal observable via the R out /R side ratios that will require further investigation. First, the decay of long-lived resonances can simulate time delay [42]. Interferometry with kaons instead of pions is therefore preferable [37].…”

Section: Discussionmentioning

confidence: 99%

Hydrodynamics and collective behaviour in relativistic nuclear collisions

Rischke

1996

Nuclear Physics A

103

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Hydrodynamics is applied to describe the dynamics of relativistic heavy-ion collisions. The focus of the present study is the influence of a possible (phase) transition to the quark-gluon plasma in the nuclear matter equation of state on collective observables, such as the lifetime of the system and the transverse directed flow of matter. It is shown that such a transition leads to a softening of the equation of state, and consequently to a time-delayed expansion which is in principle observable via two-particle correlation functions. Moreover, the delayed expansion leads to a local minimum in the excitation function of transverse directed flow around AGS energies.

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“…First, effects of resonance decays are small (only the shorter-lived K ⋆ resonances influence the final kaon spectra, at most a (small) 10%-effect at temperatures corresponding to freeze-out [13]). For pion interferometry, however, the decay of long-lived resonances plays an important role and virtually increases the (average) source size and lifetime of the system [34]. This results in considerable modifications of the inverse width of the two-particle correlation functions of pions [13,31,35].…”

Section: Discussionmentioning

confidence: 99%

Kaon interferometry as signal for the QCD phase transition at RHIC

Bernard¹,

Rischke²,

Maruhn³

et al. 1997

Nuclear Physics A

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Pion and kaon correlations in relativistic nuclear collisions are studied in the framework of boost-invariant, cylindrically symmetric hydrodynamics. It is investigated how the inverse widths, R out , R side , of the two-particle correlation functions in out-and side-direction depend on the average transverse momentum K ⊥ of the particle pair, the initial energy density ǫ 0 , and the equation of state of the system. The QCD transition leads to a time delay in the expansion of the system and consequently to an enhancement of the ratio R out /R side . This time-delay signal is found to be particularly strong for large average transverse momenta K ⊥ ∼ 1 GeV and initial energy densities accessible at RHIC, ǫ 0 ∼ 10 − 20 GeV fm −3 . Neutral kaon pair correlation functions, which are not influenced by final state Coulomb effects and less contaminated by resonance decays than pion correlation functions, seem to be the ideal tool to detect this collective time-delay signature of the QCD transition. † Supported by DFG, BMBF, GSI, and DOE.

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Pion interferometry and resonances in pp and AA collisions

Cited by 9 publications

References 17 publications

Two-particle Bose–Einstein correlations in pp collisions at $$\mathbf {\sqrt{s} =}$$ s = 0.9 and 7 TeV measured with the ATLAS detector

Two-particle Bose–Einstein correlations in pp collisions at $$\mathbf {\sqrt{s} =}$$ s = 0.9 and 7 TeV measured with the ATLAS detector

Hydrodynamics and collective behaviour in relativistic nuclear collisions

Kaon interferometry as signal for the QCD phase transition at RHIC

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