Estimate of background baseline and upper limit on the chiral magnetic effect in isobar collisions at root SNN=200 GeV at the BNL Relativistic Heavy Ion Collider

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00380204" target="_blank" >RIV/68407700:21340/24:00380204 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.110.014905" target="_blank" >https://doi.org/10.1103/PhysRevC.110.014905</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.110.014905" target="_blank" >10.1103/PhysRevC.110.014905</a>

Result language
angličtina
Original language name
Estimate of background baseline and upper limit on the chiral magnetic effect in isobar collisions at root SNN=200 GeV at the BNL Relativistic Heavy Ion Collider
Original language description
For the search of the chiral magnetic effect (CME), STAR previously presented the results from isobar collisions (Ru-96(44) + Ru-96(44), Zr-96(40) + Zr-96(40)) obtained through a blind analysis. The ratio of results in Ru + Ru to Zr + Zr collisions for the CME-sensitive charge-dependent azimuthal correlator (Delta gamma), normalized by elliptic anisotropy (v(2)), was observed to be close to but systematically larger than the inverse multiplicity ratio. The background baseline for the isobar ratio, Y = (Delta gamma/v(2))(Ru)/(Delta gamma/v(2))(Zr), is naively expected to be (1/N)(Ru)/(1/N)(Zr); however, genuine two- and three-particle correlations are expected to alter it. We estimate the contributions to Y from those correlations, utilizing both the isobar data and HIJING simulations. After including those contributions, we arrive at a final background baseline for Y, which is consistent with the isobar data. We extract an upper limit for the CME fraction in the Delta gamma measurement of approximately 10% at a 95% confidence level on in isobar collisions at root S-NN = 200 GeV, with an expected 15% difference in their squared magnetic fields.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/LM2023034" target="_blank" >LM2023034: Brookhaven National Laboratory - Participation of the Czech Republic</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)