### Conveners

#### Correlations and Fluctuations I

- Tapan Nayak (Department of Atomic Energy (IN))

Dr
Jochen Thaeder
(Lawrence Berkeley National Laboratory)

9/28/15, 2:30 PM

Correlations and Fluctuations

Contributed talk

Studying fluctuations of conserved quantities, such as baryon number (B) and charge (Q), provides insight into the properties of matter created in high-energy nuclear collisions. Lattice QCD calculations suggest that higher moments of these quantities are sensitive to the phase structure of the hot and dense nuclear matter created in such collisions.
The Beam Energy Scan (BES)-I program at...

Rashmi Raniwala
(University of Rajasthan (IN))

9/28/15, 2:50 PM

Correlations and Fluctuations

Contributed talk

In a collision of identical nuclei, the extended size and the finite number of nucleons lead to fluctuations in the number of participating nucleons from each nucleus at any impact parameter. This is akin to collisions of unequal-mass nuclei and corresponds to a non-zero momentum of the participant zone in the laboratory frame. Event-by-event fluctuations are estimated by measuring the...

Sooraj Krishnan Radhakrishnan
(State University of New York (US))

9/28/15, 3:10 PM

Correlations and Fluctuations

Contributed talk

ATLAS measurements of correlations between elliptic or triangular flow, vm (m=2,3), and other flow harmonics vn (n=2−5), in Pb+Pb collisions at sqrt(sNN)=2.76 TeV are presented. The vm-vn correlations are measured as a function of centrality, and as a function of varying event-geometry but fixed centrality using the "event-shape" selection technique. The measurements show that the effects of...

Masayuki Asakawa
(Osaka University)

9/28/15, 3:30 PM

Correlations and Fluctuations

Contributed talk

We study the effect of the difference between momentum- and
coordinate-space rapidities on the experimental measurements
of fluctuation observables in relativistic heavy ion collisions.
In theoretical studies on fluctuation observables,
observables in fixed coordinate-space rapidity windows are
concerned because the analyses are usually performed in finite volume.
The experimental...

Hannah Petersen

9/28/15, 3:50 PM

Correlations and Fluctuations

Contributed talk

The higher moments of the net baryon and net charge distributions, e.g. the skewness and kurtosis, are studied within an infinite hadronic matter calculation in a transport approach. By dividing the box into several parts, the volume dependence of the fluctuations is investigated. After confirming that the initial distributions follow the expectations from a Poisson distribution, the influence...

Li Yan
(CNRS)

9/28/15, 4:10 PM

Correlations and Fluctuations

Contributed talk

Higher-order harmonics of anisotropic flow ($v_n$ with $n\ge 4$) can
be measured with the direction of lower-order harmonics, e.g., $v_4$
with respect to the $v_2$ plane.
We show that one can scale these measurements by quantities involving
lower-order harmonics in such a way that the
ratio is independent of initial conditions, and solely involves the
medium nonlinear response.
The...