PHOBOS Collaboration

Alver, B.; Back, B. B.; Baker, M. D.; Ballintijn, M.; Barton, D. S.; Betts, R. R.; Bickley, A. A.; Bindel, R.; Budzanowski, A.; Busza, W.; Carroll, A.; Chai, Z.; Chetluru, V.; Decowski, M. P.; Garcia, E. Oliver; Gburek, T.; George, N.; Gulbrandsen, K.; Gushue, S.; Halliwell, C.; Hamblen, J.; Heintzelman, G.A.; Henderson, Cynthia T.; Harnarine, I.; Hofman, D.J.; Hollis, R.S.; Hołyński, R.; Holzman, B.; Iordanova, A.; Johnson, Emily; Kane, J.L.; Khan, Nawazish A.; Kucewicz, W.; Kulinich, P.; Kuo, C.M.; Li, W.; Lin, W.; Loizides, C.; Manly, S.; Mignerey, A. C.; Nouicer, R.; Olszewski, A.; Pak, R.; Park, I.C.; Reed, Christopher Robert; Remsberg, L.P.; Reuter, M.; Richardson, E.; Roland, C.; Roland, G.; Rosenberg, L.; Sagerer, J.; Sarin, P.; Sawicki, P.; Sedykh, I.; Skulski, W.; C.E., Smith,; Stankiewicz, M.A.; Steinberg, P.; Stephans, G.S.F.; Sukhanov, A.; Szostak, A.; Tang, J.-L.; Tonjes, M. B.; Trzupek, A.; Vale, C.; Nieuwenhuizen, G. J. van; Vaurynovich, S.S.; Verdier, R.; Veres, G.I.; Wenger, E.; Willhelm, D.; Wolfs, F.L.H.; Wosiek, B. K.; Woźniak, K. W.; Wuosmaa, A.H.; Wyngaardt, S.; Wysłouch, Bolesław

doi:10.1016/j.nuclphysa.2006.07.015

Cited by 206 publications

(427 citation statements)

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“…We generate π + and π − with Poisson multiplicity fluctuations in each event. The p T of π mesons correspond to the measured data in the 30-40% centrality of Au+Au collisions at √ s NN = 200 GeV [42,43]; The η spectra is parameterized as [44] dN ch…”

Section: Trivial Linear Term In Vn(a Ch )mentioning

confidence: 99%

Complications in the interpretation of the charge-asymmetry-dependent π flow for the chiral magnetic wave

Zhao

Feng

et al. 2020

Phys. Rev. C

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The charge asymmetry (A ch ) dependence of the π − and π + elliptic flow difference, ∆v2(A ch ), has been regarded as a sensitive observable for the possible chiral magnetic wave (CMW) in relativistic heavy ion collisions. In this work, we first demonstrate that, due to non-flow backgrounds, the flow measurements by the Q-cumulant method using all charged particles as reference introduce a trivial linear term to ∆v2(A ch ). The trivial slope can be negative in the triangle flow difference ∆v3(A ch ) if the non-flow is dominated by back-to-back pairs. After eliminating the trivial term, we find that the non-flow between like-sign pairs gives rise to an additional positive slope to ∆v2(A ch ) because of the larger dilution effect to π + (π − ) at positive (negative) A ch . We further find that the competition between different π sources can introduce another non-trivial linear-A ch term due to their different multiplicity fluctuations and anisotropic flows. We then study the effect of neutral cluster (resonance) decays as a mechanism for local charge conservation on the slope parameter of ∆v2(A ch ). We find that the slope parameter is sensitive to the kinematics of those neutral clusters. Light resonances give positive slopes while heavy resonances give negative slopes. Local charge conservation from continuum cluster mass distribution can give a positive slope parameter comparable to experimental data. Our studies indicate that many non-CMW physics mechanisms can give rise to a A ch -dependent ∆v2(A ch ) and the interpretation of ∆v2(A ch ) in terms of the CMW is delicate.PACS numbers: 25.75.Gz, 25.75.Ld

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Section: Trivial Linear Term In Vn(a Ch )mentioning

confidence: 99%

Complications in the interpretation of the charge-asymmetry-dependent π flow for the chiral magnetic wave

Zhao

Feng

et al. 2020

Phys. Rev. C

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“…Moreover, other interesting measurements that have shown similar phenomena in the high multiplicity events in proton-proton collisions as in central heavy ion collisions, e.g. long-range ridge-like structure [13,14], and strangeness enhancement [15], have stimulated the search for the onset of such and similar phenomena in the high multiplicity condition regardless of the colliding systems size. In addition, although it is well known that PYTHIA doesn't include final state interactions, previous simulated data (PYTHIA) [13,16] have shown qualitatively, but not quantitatively, similar patterns and structures for some of the observables, as in central heavy ion collisions.…”

Section: Introductionmentioning

confidence: 96%

“…long-range ridge-like structure [13,14], and strangeness enhancement [15], have stimulated the search for the onset of such and similar phenomena in the high multiplicity condition regardless of the colliding systems size. In addition, although it is well known that PYTHIA doesn't include final state interactions, previous simulated data (PYTHIA) [13,16] have shown qualitatively, but not quantitatively, similar patterns and structures for some of the observables, as in central heavy ion collisions. Such observations might indicate a non-trivial contributions for the commonly adopted observables from the underlying particle production mechanisms in QCD, and therefore the presented analysis.…”

Section: Introductionmentioning

confidence: 99%

The Onset of Jet Quenching Phenomenon

AlFiky¹,

Elsherif²,

Hamed³

2020

Pis'ma Zh. Eksp. Teor. Fiz.

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The aim of this study is to set a baseline for the jet quenching measurements of the Quark Gluon Plasma (QGP) formed in the large system size Nucleus-Nucleus (A-A) at top central collisions, via studying simulated small system size, Nucleon-Nucleon (N-N) collisions. The proton-proton (p-p) collisions were simulated using PYTHIA, at center of mass energies √ s N N = 200 GeV and √ s N N = 13 T eV corresponding to the available energies at the current collider experiments; the Relativistic Heavy Ion Collider (RHIC), and the Large Hadron Collider (LHC). At both energies, the two-particle azimuthal correlation functions have been considered, and the yield associated with the high transverse momentum (p T ) particles were extracted at its near-side (∆φ ≈ 0) and away-side (∆φ ≈ π) at mid pseudo rapidity (|η| ≤ 2). The ratio between the near-side yields in the high multiplicity events to these of the low multiplicity events (I N HL ), as well as, the ratio of the away-side yields (I A HL ) were calculated at both energies as a function of the hadron fractional energy z T of the high-p T particle. At both energies, the values of I N HL and I A HL were less than unity, and of trivial dependence on z T . The values of I A HL are always less than these of I N HL at the same multiplicity and energy, and both quantities show a pattern of systematic decreases with the multiplicity. Such multiplicity dependence cannot be used neither to exclude the jet quenching nor to prove it in the high multiplicity events in p-p collisions, as the suppressions have been found at both sides, near and away of the high-p T particle.

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“…For such interpretations, it is assumed that, in p + p collisions, no intermediate partonic medium is formed. However, recent results show that such assumptions may not be correct for high multiplicity p + p collisions [12][13][14]. In this regard, for understanding dynamics of QCD medium formed in relativistic heavy ion collisions, it is very crucial to understand results of p + p collisions.…”

Section: Introductionmentioning

confidence: 99%

Glauber model for a small system using the anisotropic and inhomogeneous density profile of a proton

et al. 2020

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Recent studies reveal that at high energies, collisions of small system like p + p give signatures similar to that widely observed in heavy ion collisions hinting towards a possibility of forming a medium with collective behaviour. With this motivation, in this work, we have used Glauber model, which is traditionally applied to heavy ion collisions, in small system using anisotropic and inhomogeneous density profile of proton and found that the proposed model reproduces the charged particle multiplicity distribution of p + p collisions at LHC energies very well. Collision geometric properties like mean impact parameter, mean number of binary collisions ( N coll ) and mean number of participants ( Npart ) at different multiplicities are determined. Having estimated N coll , we have calculated nuclear modification-like factor (Rpp) in p+p collisions. We also estimated eccentricity and elliptic flow as a function of charged particle multiplicity using linear response to initial geometry.

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PHOBOS Collaboration

Cited by 206 publications

References 0 publications

Complications in the interpretation of the charge-asymmetry-dependent π flow for the chiral magnetic wave

Complications in the interpretation of the charge-asymmetry-dependent π flow for the chiral magnetic wave

The Onset of Jet Quenching Phenomenon

Glauber model for a small system using the anisotropic and inhomogeneous density profile of a proton

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