Measurement of the Transverse Polarization of Λ and Λ̅ Hyperons Produced in Proton-Proton Collisions at √s = 7 TeV using the ATLAS Detector

DSpace/Manakin Repository

Measurement of the Transverse Polarization of Λ and Λ̅ Hyperons Produced in Proton-Proton Collisions at √s = 7 TeV using the ATLAS Detector

Show full item record

Title: Measurement of the Transverse Polarization of Λ and Λ̅ Hyperons Produced in Proton-Proton Collisions at √s = 7 TeV using the ATLAS Detector
Author(s):
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Abi, B.;
Izen, Joseph M.;
Leyton, Michael;
Lou, Xinchou;
Namasivayam, Harisankar;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2015-02-10
Format: Text
Item Type: Article
Keywords: Show Keywords
Abstract: The transverse polarization of Λ and Λ̅ 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 x 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 Λ̅. It is also measured as a function of x(F) and p(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(F) range covered by this measurement.
Publisher: Amer Physical Soc
ISSN: 1550-7998
Source: Physical Review D
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.91.032004
Persistent Link: http://hdl.handle.net/10735.1/4376
Bibliographic Citation: Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2015. "Measurement of the transverse polarization of Λ and Λ̅ hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector." Physical Review D 91(3): doi:10.1103/PhysRevD.91.032004.
Terms of Use: CC BY 3.0 (Attribution)
©2015 CERN, for the ATLAS collaboration

Files in this item

Files Size Format View
NSM-2307-271923.38.pdf 770.5Kb PDF View/Open Article

This item appears in the following Collection(s)


Show full item record

CC BY 3.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 3.0 (Attribution)