skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: S119n spin-lattice relaxation in α-SnF2
Award ID(s):
0411790
PAR ID:
10012651
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
Physical Review B
Volume:
79
Issue:
21
ISSN:
1098-0121
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. The polarization of the Λ and Λ ¯ hyperons along the beam direction has been measured in proton-lead ( p -Pb ) collisions at a center-of-mass energy per nucleon pair of 8.16 TeV. The data were obtained with the CMS detector at the LHC and correspond to an integrated luminosity of 186.0 ± 6.5 nb 1 . A significant azimuthal dependence of the hyperon polarization, characterized by the second-order Fourier sine coefficient P z , s 2 , is observed. The P z , s 2 values decrease as a function of charged particle multiplicity, but increase with transverse momentum. A hydrodynamic model that describes the observed P z , s 2 values in nucleus-nucleus collisions by introducing vorticity effects does not reproduce either the sign or the magnitude of the p -Pb results. These observations pose a challenge to the current theoretical implementation of spin polarization in heavy ion collisions and offer new insights into the origin of spin polarization in hadronic collisions at LHC energies. 
    more » « less