English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background: The chiral magnetic effect (CME) is extensively studied inheavy-ion collisions at RHIC and the LHC. An azimuthal correlator called$R_{\Psi_{m}}$ was proposed to measure the CME. By observing the same$R_{\Psi_{2}}$ and $R_{\Psi_{3}}$ (convex) distributions from A Multi-PhaseTransport (AMPT) model, by contrasting data and model as well as large andsmall systems and by event shape engineering (ESE), a recent preprint(arXiv:2006.04251v1) from STAR suggests that the $R_{\Psi_{m}}$ observable issensitive to the CME signal and relatively insensitive to backgrounds, andtheir Au+Au data are inconsistent with known background contributions.  Purpose: We examine those claims by studying the robustness of the$R_{\Psi_{m}}$ observable using AMPT as well as toy model simulations. Wecompare $R_{\Psi_{m}}$ to the more widely used $\Delta\gamma$ azimuthalcorrelator to identify their commonalities and differences.  Methods: We use AMPT to simulate Au+Au, p+Au, and d+Au collisions at$\sqrt{s_{NN}} = 200 \text{ GeV}$, and study the responses of $R_{\Psi_{m}}$ toanisotropic flow backgrounds in the model. We also use a toy model to simulateresonance flow background and input CME signal to investigate their effects in$R_{\Psi_{2}}$. Additionally we use the toy model to perform an ESE analysis tocompare to STAR data as well as predict the degree of sensitivity of$R_{\Psi_{2}}$ to isobar collisions with the event statistics taken at RHIC.  ...

Decipher the $R_{\Psi_{m}}$ correlator in search for the chiral magnetic effect in relativistic heavy ion collisions