Abstract
Directed flow, v1, is measured over a wide range of pseudo-rapidity, |η| < 5.1, in Pb-Pb collisions at 2.76 TeV with ALICE at the LHC. v1 is reported as a function of the pseudo-rapidity, the transverse momentum and collision centrality. Using the neutral spectator deflection at beam rapidity we investigate both the rapidity asymmetric v1 which is sensitive to the collision reaction plane, and the rapidity symmetric v1 which is sensitive to the energy fluctuations in the initial geometry. The results are compared with those at RHIC, and the model calculations.
Highlights
The collective sideward motion of spectators and produced particles arises in non-central heavy-ion collisions
A turnover point changing the v1(η) slope should occur at some rapidity where the fragments
The existing predictions [6], [7] for the LHC energy give a positive slope at midrapidity, opposite to that observed in the data
Summary
The collective sideward motion of spectators and produced particles arises in non-central heavy-ion collisions. This effect is called the directed flow v1. At RHIC energies directed flow at midrapidity has been measured to have a negative slope. Data don’t support a wiggle structure at midrapidity in the observed charged particle directed flow [2].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
