Measurement of J / ψ and ψ (2S) polarization in pp̄ collisions at √s = 1.8 TeV

Measurement of J / ψ and ψ (2S) polarization in pp̄ collisions at √s = 1.8 TeV

We have measured the polarization of J/ψ and ψ(2S) mesons produced in pp̄ collisions at √s = 1.8 TeV, using data collected at the Collider Detector at Fermilab during 1992-1995. The polarization of promptly produced J/ψ [ψ(2S)] mesons is isolated from those produced in B-hadron decay, and measured o...

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Bibliographic Details
Main Authors: Affolder, T, Akimoto, H, Akopian, A, Albrow, MG, Amaral, P, Amendolia, SR, Amidei, D, Anikeev, K, Antos, J, Apollinari, G, Arisawa, T, Asakawa, T, Ashmanskas, W, Atac, M, Azfar, F, Azzi-Bacchetta, P, Bacchetta, N, Bailey, M, Bailey, S, De Barbara, P, Barbaro-Galtieri, A, Barnes, V, Barnett, B, Barone, M, Bauer, G
Format: Journal article
Language:English
Published: 2000
Description
Summary:We have measured the polarization of J/ψ and ψ(2S) mesons produced in pp̄ collisions at √s = 1.8 TeV, using data collected at the Collider Detector at Fermilab during 1992-1995. The polarization of promptly produced J/ψ [ψ(2S)] mesons is isolated from those produced in B-hadron decay, and measured over the kinematic range 4 [5.5] < PT < 20 GeV/c and |y| < 0.6. For PT ≳ 12 GeV/c we do not observe significant polarization in the prompt component. © 2000 The American Physical Society.

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