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Title: Λ hyperon polarization in relativistic heavy ion collisions from a chiral kinetic approach

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1375550
Grant/Contract Number:
SC0015266
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 2; Related Information: CHORUS Timestamp: 2017-08-18 19:34:06; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Sun, Yifeng, and Ko, Che Ming. Λ hyperon polarization in relativistic heavy ion collisions from a chiral kinetic approach. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.96.024906.
Sun, Yifeng, & Ko, Che Ming. Λ hyperon polarization in relativistic heavy ion collisions from a chiral kinetic approach. United States. doi:10.1103/PhysRevC.96.024906.
Sun, Yifeng, and Ko, Che Ming. Fri . "Λ hyperon polarization in relativistic heavy ion collisions from a chiral kinetic approach". United States. doi:10.1103/PhysRevC.96.024906.
@article{osti_1375550,
title = {Λ hyperon polarization in relativistic heavy ion collisions from a chiral kinetic approach},
author = {Sun, Yifeng and Ko, Che Ming},
abstractNote = {},
doi = {10.1103/PhysRevC.96.024906},
journal = {Physical Review C},
number = 2,
volume = 96,
place = {United States},
year = {Fri Aug 18 00:00:00 EDT 2017},
month = {Fri Aug 18 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 18, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

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  • We measure the transverse polarization of Λ and Λ¯ hyperons produced in proton-proton collisions at a center-of mass energy of 7 TeV is measured. The analysis uses 760 μb ₋1 of minimum bias data collected by the ATLAS detector at the LHC in the year 2010. The measured transverse polarization averaged over Feynman x F from 5 × 10 ₋5 to 0.01 and transverse momentum p T from 0.8 to 15 GeV is ₋0.010 ± 0.005(stat) ± 0.004(syst) for Λ and 0.002 ± 0.006(stat) ± 0.004(syst) for Λ¯ . It is also measured as a function of x F andmore » p T, but we observed no significant dependence on these variables. Prior to this measurement, the polarization was measured at fixed-target experiments with center-of-mass energies up to about 40 GeV. The ATLAS results are compatible with the extrapolation of a fit from previous measurements to the x F range covered by this measurement.« less
    Cited by 3
  • We measure the transverse polarization of Λ and Λ¯ hyperons produced in proton-proton collisions at a center-of mass energy of 7 TeV is measured. The analysis uses 760 μb ₋1 of minimum bias data collected by the ATLAS detector at the LHC in the year 2010. The measured transverse polarization averaged over Feynman x F from 5 × 10 ₋5 to 0.01 and transverse momentum p T from 0.8 to 15 GeV is ₋0.010 ± 0.005(stat) ± 0.004(syst) for Λ and 0.002 ± 0.006(stat) ± 0.004(syst) for Λ¯ . It is also measured as a function of x F andmore » p T, but we observed no significant dependence on these variables. Prior to this measurement, the polarization was measured at fixed-target experiments with center-of-mass energies up to about 40 GeV. The ATLAS results are compatible with the extrapolation of a fit from previous measurements to the x F range covered by this measurement.« less
  • © 2016 CERN for the benefit of the ALICE Collaboration. The production of the hypertriton nuclei HΛ3 and H[U+203E]Λ-3 has been measured for the first time in Pb-Pb collisions at sNN=2.76 TeV with the ALICE experiment at LHC. The p T -integrated HΛ3 yield in one unity of rapidity, dN/dy×B.R.(HΛ3→He3,π-)=(3.86±0.77(stat.)±0.68(syst.))×10-in the 0-10% most central collisions, is consistent with the predictions from a statistical thermal model using the same temperature as for the light hadrons. The coalescence parameter B 3 shows a dependence on the transverse momentum, similar to the B 2 of deuterons and the B 3 of 3 Hemore » nuclei. The ratio of yields S3=HΛ3/(He3×Λ/p) was measured to be S 3 =0.60±0.13(stat.)±0.21(syst.) in 0-10% centrality events; this value is compared to different theoretical models. The measured S 3 is compatible with thermal model predictions. The measured HΛ3 lifetime, τ=181-39+54(stat.)±33(syst.)ps is in agreement within 1σ with the world average value.« less
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