Vector meson production and nuclear effects in FNAL E866

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Fermilab E866/NUSEA is a fixed-target experiment which has made a number of measurements of the production of vector mesons by 800 GeV protons. The nuclear dependence results include measurements for J/{psi}, {psi}{prime} and {phi} production over very broad ranges in {chi}{sub F} and p{sub T}, and the J/{psi} decay angular distribution at very large {chi}{sub F}. Preliminary results from measurements on Be, Fe and W targets are presented and discussed in the context of nuclear effects such as energy loss and multiple scattering of the partons, absorption of the produced c{bar c} pairs, and shadowing. Production mechanisms involving color-singlet or ... continued below

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10 p.

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Leitch, M.J. & Collaboration, E866 /NUSEA December 31, 1998.

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Fermilab E866/NUSEA is a fixed-target experiment which has made a number of measurements of the production of vector mesons by 800 GeV protons. The nuclear dependence results include measurements for J/{psi}, {psi}{prime} and {phi} production over very broad ranges in {chi}{sub F} and p{sub T}, and the J/{psi} decay angular distribution at very large {chi}{sub F}. Preliminary results from measurements on Be, Fe and W targets are presented and discussed in the context of nuclear effects such as energy loss and multiple scattering of the partons, absorption of the produced c{bar c} pairs, and shadowing. Production mechanisms involving color-singlet or color-octet states for the c{bar c} pair which eventually forms a J/{psi} or {psi}{prime}, have implications on the strength of absorption in the nucleus and on the angular distribution of the decay muons. Their preliminary results on the angular distributions versus {chi}{sub F} and p{sub T} indicate some transverse polarization of the J/{psi} as predicted by models of production through the color octet state. The measurements of dimuons in the 1 to 3 GeV region explore the nuclear dependence of the {phi} meson and also the composition of the continuum between the {phi} and the J/{psi}. These studies of vector meson production and it`s nuclear dependence are critical in furthering the understanding of these processes towards future measurements at RHIC and new results from NA50 at CERN, where J/{psi} suppression is predicted to be an important signature of the creation of quark-gluon plasma in heavy-ion collisions.

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10 p.

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INIS; OSTI as DE99002282

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  • Workshop on quarkonium production in relativistic nuclear collisons, Seattle, WA (United States), 11-15 May 1998

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  • Other: DE99002282
  • Report No.: LA-UR--98-3370
  • Report No.: CONF-9805166--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 334339
  • Archival Resource Key: ark:/67531/metadc681854

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  • December 31, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • March 1, 2016, 2:17 p.m.

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Leitch, M.J. & Collaboration, E866 /NUSEA. Vector meson production and nuclear effects in FNAL E866, article, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc681854/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.