Speaker
Rajeev Bhalerao
(TIFR)
Description
We present a complete set of multiparticle correlation observables for
ultrarelativistic heavy-ion collisions. These include moments of the
distribution of the anisotropic flow in a single harmonic, and also
mixed moments, which contain the information on correlations between
event planes of different harmonics. We explain how all these moments
can be measured using just two symmetric subevents separated by a
rapidity gap. This procedure is less demanding in terms of detector
acceptance than the one based on several rapidity windows separated
pairwise by gaps. These moments present a multi-pronged probe of the
physics of flow fluctuations. For instance, they allow to test the
hypothesis that event-plane correlations are generated by non-linear
hydrodynamic response. They can be measured easily at LHC and even
with detectors having smaller acceptance, and can be directly compared
with theoretical calculations. We illustrate the method with
simulations of events in A MultiPhase Transport (AMPT) model [1]. It
is important to test if experimental data at LHC confirm these
predictions.
[1] R.S. Bhalerao, J.-Y. Ollitrault, S. Pal, Phys. Lett. B 742 (2015) 94
| On behalf of collaboration: | NONE |
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Author
Rajeev Bhalerao
(TIFR)
Co-authors
Jean-Yves Ollitrault
(CNRS)
Subrata Pal
(Tata Institute of Fundamental Research, Mumbai, India)
