Jinhui Chen’s research while affiliated with Fudan University and other places

... In comparison to the net-baryon fluctuations, the temperature fluctuation has attracted less attention, yet it still provides an ideally powerful probe of QCD thermodynamics and phase transitions as same as the fluctuations of conserved charges. Recent advances in heavy-ion collision experiments now enable the isolation of the thermal fluctuations from confounding effects, such as the initial state geometry fluctuations [28][29][30][31][32], flow contributions, and other non-thermal sources, allowing temperature fluctuations to be extracted from EbE mean transverse momentum fluctuations of final-state charged particles [27]. EbE mean transverse momentum fluctuations have been extensively measured across collision energies and systems in various heavy-ion facilities, offering a new avenue to study the QCD phase diagram [31,[33][34][35][36][37][38]. ...

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High-order fluctuations of temperature in hot QCD matter

... We ignore short range correlations, as well as those due to Pauli exclusion principle, which we do not expect to have a major impact on angular correlations. These are known for instance to have modest effects on angular correlations and spatial anisotropies in heavy-ion collisions[53,54,55,56]. We shall also ignore later (in Section 4) the correlations due to the center of mass motion, although these could be sizable for light nuclei. ...

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Angular structure of many-body correlations in atomic nuclei: From nuclear deformations to diffractive vector meson production in $\gamma A$ collisions

... In recent years, the study of nuclear structure has garnered significant attention in the context of heavy-ion collisions. Notable advancements have been achieved in various areas, including deformed nuclei [36][37][38][39][40][41] α clusters [42][43][44], neutron halos [45,46], and neutron skins [47][48][49][50]. To address the challenges in this field, we propose modifying the initial nuclear structure. ...

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Impact of Initial-State Nuclear and Sub-Nucleon Structures on Ultra-Central Puzzle in Heavy Ion Collisions

... (11), (22), and (31) are not necessarily unidirectional. As noted in Ref. [61], global spin alignment may also arise from the CME. For instance, the CME induces charge separation of π + and π − , some of which later coalesce into ρ mesons with ρ 00 ̸ = 1/3. ...

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Effect of vector meson spin coherence on the measurements of chiral magnetic effect in heavy-ion collisions

... 分Glauber模型 [62] 拟合. 这样, 与旁观者相关的量就可 根据如下Wigner函数计算得到 [64][65][66][67] [75] . 下, 这些比率可直接反映初始碰撞几何和涨落效应. ...

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Probing longitudinal structures of quark gluon plasma in extreme states of nuclear matter

... This spin alignment phenomenon is related to the chiral chemical potential and angular velocity. Some studies [17,18,[47][48][49] have manifested that whether the spin density matrix element ρ 00 of the vector meson deviates from 1=3 is a key factor in studying the spin alignment of the vector meson ρ. ...

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Chiral phase transition and spin alignment of vector mesons with chiral imbalance in a rotating QCD medium

... [75,[79][80][81], is the large fluctuations of the correlated strangeness (s) and anti-strangeness (s) color fields, though that mechanism would not explain the measured p T and centrality dependence of the effect. It has been argued [82] that ρ 0 -meson spin alignment, if similar to that reported for the ϕ-meson, can contribute to charge separation ∆γ measurements due to the anisotropic distribution of the daughter π + and π − in the ρ 0 rest frame relative to the RP. This effect, if exists, is unlikely to be related to the magnetic field, and thus could be treated similarly to other RP-dependent backgrounds discussed in Sect. ...

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Experimental Search for the Chiral Magnetic Effect in Relativistic Heavy-Ion Collisions: A Perspective

... Experiment−The experiment was performed with the spectrometer facility of the A1 Collaboration [19] at Mainz Microtron (MAMI). A 0.75 mm wide and 45 mm long natural lithium target (2.4 g/cm 2 mass thickness), composed with about 92.7% 7 Li and 7.3% 6 Li, was bombarded with a 855 MeV electron beam along its long direction (more details in ref. [20]). When the energy transferred from the beam electron to a proton in 7 Li nucleus via a virtual photon is larger than 300 MeV, the proton can be excited into a ∆ + (1232) which is shortlived and decays to a nucleon and a π + . ...

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Measurement of $\rm ^{6}H$ ground state energy in an electron scattering experiment at MAMI-A1

... τ b 1 differs from other versions of 1-jettiness such as τ a 1 defined in [22] or τ 1 in [27], which define 1-jettiness regions and reference axes defined by certain algorithms such as jet and jettiness algorithms [28]. These versions have a slightly simpler factorization theorem in the resummation region [22,27], but can be somewhat more complicated to measure experimentally than τ b 1 . ...

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Precision DIS thrust predictions for HERA and EIC

... Methods.-In the present study, we use the AMPT model [52,53] to simulate the evolution of a collision system at relativistic energies and obtain the final phasespace distribution of kinetically freeze-out nucleons. This model has been widely adopted for studying light nuclei production and jet observables, such as the jet shape [54], jet quenching effects [55][56][57][58], deuteron production and deuteron elliptic flow [32,59], light (hyper)nuclei production and correlation [45,60,61] as well as nuclear structure effects [62][63][64] and so on. The AMPT model contains four main stages: initial condition, parton cascade, hadronization, and hadronic decays and rescatterings. ...

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Jet-Induced Enhancement of Deuteron Production in $pp$ and $p$-Pb Collisions at the LHC