View in EDS

Spin alignment of K*0(892) and (1020) mesons in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV.

Saved in:
Bibliographic Details
Title: Spin alignment of K*0(892) and (1020) mesons in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV.
Authors: J H Chen, for the, STAR Collaboration
Source: Journal of Physics G: Nuclear & Particle Physics. Apr2008, Vol. 35 Issue 4, p44068-44068. 1p.
Subjects: Collisions (Nuclear physics), Mesons, Polarization (Nuclear physics), Nuclear physics
Abstract: We present the first spin alignment measurements for the vector mesons K*0(892) and ph(1020) at mid-rapidity in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV. Vector mesons appear to be produced without a strong spin alignment constraining possible spin transfer processes from a large orbital angular momentum of the colliding system as expected in theoretical calculations. The diagonal spin density matrix elements are measured to be r00 = 0.32 ± 0.04 (stat) ± 0.09 (syst) for the K*0 (0.8 < pT < 5.0 GeV/c) and r00 = 0.34 ± 0.02 (stat) ± 0.03 (syst) for the ph (0.4 < pT < 5.0 GeV/c), with respect to the reaction plane in midcentral Au+Au collisions, and are found to be independent of collision centrality and transverse momentum. r00 with respect to the production plane is measured to be less than 2s deviation above 1/3 in both Au+Au and p+p collisions indicating the absence of polarization phenomena in the production dynamics for vector mesons in the measured kinematic region. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Physics G: Nuclear & Particle Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 31866344
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Spin alignment of K*0(892) and (1020) mesons in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV.
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22J+H+Chen%22&quot;&gt;J H Chen&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22for+the%22&quot;&gt;for the&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22STAR+Collaboration%22&quot;&gt;STAR Collaboration&lt;/searchLink&gt;
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Journal+of+Physics+G%3A+Nuclear+%26+Particle+Physics%22&quot;&gt;Journal of Physics G: Nuclear &amp; Particle Physics&lt;/searchLink&gt;. Apr2008, Vol. 35 Issue 4, p44068-44068. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Collisions+%28Nuclear+physics%29%22&quot;&gt;Collisions (Nuclear physics)&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Mesons%22&quot;&gt;Mesons&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Polarization+%28Nuclear+physics%29%22&quot;&gt;Polarization (Nuclear physics)&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Nuclear+physics%22&quot;&gt;Nuclear physics&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We present the first spin alignment measurements for the vector mesons K*0(892) and ph(1020) at mid-rapidity in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV. Vector mesons appear to be produced without a strong spin alignment constraining possible spin transfer processes from a large orbital angular momentum of the colliding system as expected in theoretical calculations. The diagonal spin density matrix elements are measured to be r00 = 0.32 &#177; 0.04 (stat) &#177; 0.09 (syst) for the K*0 (0.8 &lt; pT &lt; 5.0 GeV/c) and r00 = 0.34 &#177; 0.02 (stat) &#177; 0.03 (syst) for the ph (0.4 &lt; pT &lt; 5.0 GeV/c), with respect to the reaction plane in midcentral Au+Au collisions, and are found to be independent of collision centrality and transverse momentum. r00 with respect to the production plane is measured to be less than 2s deviation above 1/3 in both Au+Au and p+p collisions indicating the absence of polarization phenomena in the production dynamics for vector mesons in the measured kinematic region. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: &lt;i&gt;Copyright of Journal of Physics G: Nuclear &amp; Particle Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=31866344
RecordInfo BibRecord:
  BibEntity:
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: 44068
    Subjects:
      – SubjectFull: Collisions (Nuclear physics)
        Type: general
      – SubjectFull: Mesons
        Type: general
      – SubjectFull: Polarization (Nuclear physics)
        Type: general
      – SubjectFull: Nuclear physics
        Type: general
    Titles:
      – TitleFull: Spin alignment of K*0(892) and (1020) mesons in Au+Au and p+p collisions at \sqrt{s_{\rm NN}} = 200 GeV.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: J H Chen
      – PersonEntity:
          Name:
            NameFull: for the
      – PersonEntity:
          Name:
            NameFull: STAR Collaboration
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 04
              Text: Apr2008
              Type: published
              Y: 2008
          Identifiers:
            – Type: issn-print
              Value: 09543899
          Numbering:
            – Type: volume
              Value: 35
            – Type: issue
              Value: 4
          Titles:
            – TitleFull: Journal of Physics G: Nuclear & Particle Physics
              Type: main
ResultId 1