Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions

Details Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprk13002l&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Despite QCD's success in describing many aspects of the strong interaction, an adequate description of quarkonia production is still lacking. While the production of the heavy barqq pair from gluon-gluon fusion or quark-antiquark annihilations can be perturbatively calculated, the long-distance process involving the formation of the bound states is presently not amenable to calculation. Various models of quarkonia production have been proposed, including the Color Octet model, and these models make predictions for polarization in quarkonia production. FNAL E866 has measured the polarization of quarkonia production in the ψ and Υ families. The data from FNAL E866/NuSea show that the Υ(1S) is produced with only slight polarization, and that only at large fractional longitudinal momentum (x_F) or large transverse momenta (p_T), while the Υ(2S) and (3S) states are completely polarized. In the ψ family, the J/ψ is produced with only slight polarization, which changes from transverse to longitudinal as a function of x_F. In addition, a lower-statistics measurement of the polarization of the ψ^' will also be presented. These results are particularly important to both RHIC and CERN, where charmonium formation plays a critical role in the search for a quark-gluon plasma.

Affiliated with

Also associated with

No associations

Rating

Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of Polarization Observables in Υ and ψ Production with 800 GeV p-Cu Collisions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1536576