Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Measurements of charge-dependent correlations with CMS

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Heavy Ions Poster Session


Subash Behera (Indian Institute of Technology Madras (IN))


Charge-dependent azimuthal anisotropy Fourier coefficients are measured with two- and three-particle correlations in pPb and PbPb collisions. The difference between positively and negatively charged particles for the second-order two-particle $(v_2\{2\})$ and three-particle $(v_2\{3\})$ coefficients for both pPb and PbPb, and third order two-particle coefficient $(v_3\{2\})$ for PbPb, are presented. The observed results are challenging the hypothesis that attributes charge-dependent azimuthal correlations in heavy ion collisions to the chiral magnetic effect. In addition, the two-particle electric charge balance function is used as a probe to study the charge creation mechanism in high energy heavy ion collisions, for the first time in CMS. The balance function is constructed using like and unlike charged-particle pairs. The width of the balance function, both in relative pseudo-rapidity and relative-azimuthal angle, increases from more central collisions to peripheral ones. Narrowing and widening of these widths indicate late and early hadronization, respectively.

In-person participation No

Primary author

Subash Behera (Indian Institute of Technology Madras (IN))

Presentation materials