M. Zyzak’s research while affiliated with Frankfurt Institute for Advanced Studies and other places

... Compared with protons, pions and kaons have smaller ∆(dv 1 /dy) magnitudes, which is understandable in view of factors such as mean p T and the formation time. A companion STAR analysis [66] assumes the coalescence sum rule using combinations of hadrons without transported quarks and concludes that the presence of the EM-field dominated by the Hall effect in mid-central events explains the observed v 1 splitting. The combined inference from Ref. [66] and the current work is that a competition between the Hall effect and the Faraday+Coulomb effect, its flavor and centrality dependence may lead to the observed v 1 splittings. ...

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Observation of the electromagnetic field effect via charge-dependent directed flow in heavy-ion collisions at the Relativistic Heavy Ion Collider

... This is the so-called standard event plane method [13]. The event plane method has been widely used in the collective flow analysis in the past decades [14][15][16][17][18][19][20] , but it is still crucial to optimize the method for the CEE experiment and to validate that the collective flow signal obtained from CEE spectrometer is reliable. ...

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Studies of Directed Flow with Event Plane Method in the HIRFL-CSR External-target Experiment

... TeV [11][12][13][14][15][16], challenges conventional expectations regarding the conditions necessary for a substantial QGP influence. ...

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Do QGP Droplets Drive Anisotropy in Small Systems? Insights from RHIC and the LHC

... This simple model has proven to be very successful in describing the measured yields of many different hadron species in heavy-ion collisions across a broad collision energy range [22,27,[36][37][38]. Figure 1 depicts various F-O points from different experiments, including STAR-BES [27], NA49 [25,[39][40][41], E-802 [25,42,43], and GSI-SIS [44]. To fill the gap at high μ B , we additionally performed fits to the recent data for 0-10 % central Au-Au collisions at √ s NN = 3 GeV from the STAR Collaboration [45,46] using Thermal-FIST and the Id-HRG model in the strangeness-canonical ensemble. Namely, we fitted the 4π yields of primordial protons, light nuclei (d, 3 H, 3 H, 4 H), 054903-2 N part , and the yields of , K 0 S , K − , φ, − normalized by N part . ...

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Chemical freeze-out curve in heavy-ion collisions and the QCD critical point

... Moreover, subtle differences in background effects between Ru + Ru and Zr + Zr collisions arising from approximately defined nuclear structures can significantly influence the relative magnitudes of the CME observables. Furthermore, incorporating higher-order deformations, such as quadrupole β 2 and octupole β 3 deformations, into the WS equation could provide deeper insights into the event-by-event initial geometric configurations [39]. This would not only make the initial conditions more interesting but also lead to a more varied initial magnetic field, which could have significant implications for the observed CME signals. ...

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Exploring the chiral magnetic effect in isobar collisions through chiral anomaly transport

... The combined UrQMD+SMM framework has recently demonstrated its capabilities to describe the light nuclei and hypernuclei multiplicities and spectra in Au+Au collisions at √ s NN = 3 GeV [37] and is therefore well suited for the present analysis of harmonic flow. [14,48]. The lower panel shows the ratio integrated over the midrapidity interval |y| ≤ 0.5 as a function of mass number A. ...

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Directed and elliptic flow of light nuclei and hypernuclei in Au+Au collisions at $\sqrt{s_\mathrm{NN}}=3$ GeV: Coalescence vs. Statistical Fragmentation

... (a) CMS x J ratio between two given track multiplicity selections, compared with Pythia8+EPOS MC [18] (b) STAR per-trigger jet spectra for trigger and recoil sides, for both high and low event activity selections[20]. (c) ALICE comparison of hadron+jet azimuthal correlations in high-multiplicity pp events with MB and Pythia8[22]. ...

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Hard-jet correlations in large and small systems

... Productions of hypernuclei in relativistic heavy ion collisions have attracted much attention in experiment [9][10][11] and theory [12][13][14][15][16]. Several experiments, such as the STAR at the BNL Relativistic Heavy Ion Collider (RHIC) [17][18][19][20] and the ALICE at the CERN Large Hadron Collider (LHC) [21][22][23][24], have collected a relative wealth of data on hypernucleus formations. In theory, two popular production mechanisms, the thermal production mechanism [25][26][27] and the coalescence mechanism [28][29][30], have been employed to successfully describe some production properties of hypernuclei. ...

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Productions of $^3_{\Lambda}$H, $^4_{\Lambda}$H and $^4_{\Lambda}$He in different coalescence channels in Au-Au collisions at $\sqrt{s_{NN}}=3$ GeV

... By requiring BEMC energy deposits greater than 0.7 GeV in back-to-back azimuthal sextants, STAR collected approximately 24 × 10 6 UPC J/ψ-triggered events, corresponding to an integrated luminosity of 13.5 nb −1 . This enabled precise measurements of J/ψ photoproduction in UPCs and the first observation of Ψ(2S) photoproduction at RHIC [226,227]. ...

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Probing Quantum Phenomena through Photoproduction in Relativistic Heavy-Ion Collisions

... By requiring BEMC energy deposits greater than 0.7 GeV in back-to-back azimuthal sextants, STAR collected approximately 24 × 10 6 UPC J/ψ-triggered events, corresponding to an integrated luminosity of 13.5 nb −1 . This enabled precise measurements of J/ψ photoproduction in UPCs and the first observation of Ψ(2S) photoproduction at RHIC [226,227]. ...

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Probing Quantum Phenomena through Photoproduction in Relativistic Heavy-Ion Collisions