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Measurement of the transverse polarization of Λ and Λ ̄ hyperons produced in proton-proton collisions at √s = 7 TeV using the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
Zwalinski, L.
2015
  • journal article

Periodico
PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Abstract
The transverse polarization of Lambda and (Lambda) over bar hyperons produced in proton-proton collisions at a center-of-mass energy of 7 TeV is measured. The analysis uses 760 mu b(-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 Lambda and 0.002 +/- 0.006(stat) +/- 0.004(syst) for (Lambda) over bar. 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
DOI
10.1103/PhysRevD.91.032004
WOS
WOS:000349487000001
Archivio
http://hdl.handle.net/11390/1096228
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84923163954
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923163954&partnerID=40&md5=523b624d0a787d17084b695c5c806d10
Diritti
metadata only access
Soggetti
  • Nuclear and High Ener...

Scopus© citazioni
29
Data di acquisizione
Jun 7, 2022
Vedi dettagli
Web of Science© citazioni
11
Data di acquisizione
Mar 27, 2024
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