Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session C13: Ultra-relativistic Heavy Ions
1:30 PM–3:18 PM,
Saturday, April 13, 2019
Sheraton
Room: Plaza Court 2
Sponsoring
Unit:
DNP
Chair: Dennis Perepelitsa, University of Colorado
Abstract: C13.00009 : Net-lambda fluctuations in Pb-Pb collisions at √SNN = 5.02 TeV in ALICE at the LHC*
3:06 PM–3:18 PM
Presenter:
Ejiro Naomi Umaka
(University of Houston)
Author:
Ejiro Naomi Umaka
(University of Houston)
Collaboration:
This is an abstract from Ejiro Naomi Umaka for the ALICE Collaboration
The analysis describes the measurement of the first and second cumulants of net-Λ distribution in Pb-Pb collisions at √SNN = 5.02 TeV using the ALICE detector. A fundamental goal of heavy-ion collision experiment is to map out the temperature (Tf) and baryon chemical potential (µBf) parameters of the Quantum chromodynamics (QCD) phase diagram at which chemical freeze-out occurs – a point on the phase diagram when particle species produced are fixed. The cumulants of conserved quantities (net-charge, net-baryon, net-strangeness) are directly related to the quark number susceptibilities calculated with lattice QCD. In a fluctuation analysis, net-pion, net-proton, and net-kaon are typically used as proxies for net-charge, net-baryon, and net-strangeness respectively. The lambda particle consists of a strange quark and it is as well a baryon. Hence, measuring the cumulants of net-Λ provides insight into the fluctuations of net-strangeness and net-baryon number. In addition, the ratios of the net-Λ cumulants used to extract Tf and μBf can be compared to those of net-proton to identify the signature of a flavor hierarchy, that is, if heavier quarks freeze-out at a different Tf and μBf from lighter quarks.
*The U.S. Department of Energy under Contract No. DEFG02- 07ER41521
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700