Helicity signatures in subthreshold ρ0 production on nuclei

G. J. Lolos, G. M. Huber, A. Shinozaki, Z. Papandreou, E. J. Brash, K. Hossain, M. Iurescu, D. Nordin, G. Garino, K. Maruyama, K. Maeda, T. Suda, A. Toyofuku, A. Sasaki, H. Yamashita

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report a helicity analysis of subthreshold ρ0 production on 2H and 12C nuclei at low photo-production energies and large |t|. The results are indicative of a large longitudinal ρ0 polarization (l = 1, m = 0) and are consistent with a strong helicity-flip mechanism of ρ0 production. The analysis is model-independent and the resulting helicity versus invariant mass distributions are consistent with the mass shift reported from our earlier 3He experiments.

Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2002 Feb 28


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