Spin alignment of the high $p_T$ vector mesons in polarized pp collisions at high energies

Details Spin alignment of the high $p_T$ vector mesons in polarized pp collisions at high energies Spin alignment of the high $p_T$ vector mesons in polarized pp collisions at high energies

2003-04-14

arxiv.org/abs/hep-ph/0304125v1

Phys.Rev. D67 (2003) 114013

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 7 figures, submitted to Phys. Rev . D

Scientific paper

10.1103/PhysRevD.67.114013

Using the same method as that used in $e^+e^-$ annihilation and lepton-nucleon deep-inelastic scattering, we calculate the spin alignment of vector mesons with high transverse momenta in high energy $pp$ collisions with one longitudinally polarized beam. We present the results obtained at RHIC energies. We also study the spin alignment of such vector mesons in the case of a transversely polarized proton beam and present its relation to the transversity distribution in the nucleon. Numerical results obtained using simple models for the transversity distributions are also given. These results show that there exist significant spin alignment in both cases, and they can be measured in experiments such as those at RHIC.

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