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Title: A measurement of the transverse polarization of Λ-hyperons produced in inelastic pN-reactions at 450 GeV proton energy

Journal Article · · European Physical Journal. C, Particles and Fields
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  1. Istituto Nazionale di Fisica Nucleare (INFN), Cagliari (Italy). Dipartimento di Fisica
  2. Univ. of Cambridge (United Kingdom). Cavendish Lab., Physics Dept.
  3. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  4. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
  5. Univ. of Edinburgh, Scotland (United Kingdom). Dept. of Physics
  6. Istituto Nazionale di Fisica Nucleare (INFN), Ferrara (Italy). Dipartimento di Fisica
  7. Istituto Nazionale di Fisica Nucleare (INFN), Firenze (Italy). Dipartimento di Fisica
  8. Univ. of Mainz (Germany). Inst. fur Physik
  9. Univ. Paris-Sud, Orsay (France). Lab. de l'Accelerateur Lineaire (LAL)
  10. Istituto Nazionale di Fisica Nucleare (INFN), Perugia (Italy). Dipartimento di Fisica
  11. Istituto Nazionale di Fisica Nucleare (INFN), Pisa (Italy). Dipartimento di Fisica
  12. Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA-Saclay), Gif-sur-Yvette (France)
  13. Univ. of Siegen (Germany). Fachbereich Physik
  14. Istituto Nazionale di Fisica Nucleare (INFN), Torino (Italy). Dipartimento di Fisica
  15. Osterreichische Akademie der Wissenschaften, Wien (Austria). Institut fur Hochenergiephysik
+ Show Author Affiliations

Here a study of the polarization of Λ hyperons produced in inelastic pN reactions induced by the 450 GeV proton beam from the CERN SPS has been performed with the NA48 detector. The Λ hyperons were detected at a fixed angle of 4.2 mrad in the momentum range from 50 GeV/c to 200 GeV/c. The polarization changes from -0.053 ± 0.034 to -0.298 ± 0.074 for a transverse momentum range of the Λ between 0.28 GeV/c and 0.86 GeV/c. The $$\bar{Λ}$$ polarization is consistent with zero.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1407021
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 6, Issue 2; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

Cited By (5)

Measurement of the $$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the $$ {\Lambda}_b^0 $$ polarisation in pp collisions journal June 2020
Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions journal June 2017
Observation of Transverse Λ / Λ ¯ Hyperon Polarization in e + e − Annihilation at Belle journal January 2019
Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions text January 2017
Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order text January 2018

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS