Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector
The transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at a center-of-mass energy of 7 TeV is measured. The analysis uses 760 μb[superscript −1] of minimum bias data collected by the ATLAS detector at the LHC in the year 2010. The measured transverse polariz...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2015
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| Online Access: | http://hdl.handle.net/1721.1/97387 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826191539993313280 |
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| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | The transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at a center-of-mass energy of 7 TeV is measured. The analysis uses 760 μb[superscript −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[subscript F] from 5 × 10[superscript −5] to 0.01 and transverse momentum p[subscript 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 [bar over Λ]. It is also measured as a function of x[subscript F] and p[subscript T], but no significant dependence on these variables is observed. 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[subscript F] range covered by this measurement. |
| first_indexed | 2024-09-23T08:57:27Z |
| format | Article |
| id | mit-1721.1/97387 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:57:27Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/973872022-09-26T09:26:23Z Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. The transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at a center-of-mass energy of 7 TeV is measured. The analysis uses 760 μb[superscript −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[subscript F] from 5 × 10[superscript −5] to 0.01 and transverse momentum p[subscript 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 [bar over Λ]. It is also measured as a function of x[subscript F] and p[subscript T], but no significant dependence on these variables is observed. 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[subscript F] range covered by this measurement. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2015-06-12T14:03:01Z 2015-06-12T14:03:01Z 2015-02 2014-12 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/97387 Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Measurement of the Transverse Polarization of Λ and [bar over Λ] Hyperons Produced in Proton-Proton Collisions at √s = 7 TeV Using the ATLAS Detector.” Phys. Rev. D 91, no. 3 (February 2015). © 2015 CERN, for the ATLAS Collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1103/PhysRevD.91.032004 Physical Review D Creative Commons Attribution 3.0 Unported Licence http://creativecommons.org/licenses/by/3.0/ application/pdf American Physical Society APS |
| spellingShingle | Taylor, Frank E. Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title | Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title_full | Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title_fullStr | Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title_full_unstemmed | Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title_short | Measurement of the transverse polarization of Λ and [bar over Λ] hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector |
| title_sort | measurement of the transverse polarization of λ and bar over λ hyperons produced in proton proton collisions at √s 7 tev using the atlas detector |
| url | http://hdl.handle.net/1721.1/97387 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke measurementofthetransversepolarizationoflandbaroverlhyperonsproducedinprotonprotoncollisionsats7tevusingtheatlasdetector |