Double spin asymmetries ANN and ASS at s=200 GeV in polarized proton–proton elastic scattering at RHIC

Autor:	Adam Rusek, Steven Tepikian, R. E. Chrien, Alexander Khodinov, I-Hung Chiang, R. L. Gill, Kaushik De, Janusz Chwastowski, David Lynn, N. Guler, T. Ljubicic, W. Guryn, S. Bültmann, M. Sakitt, Alexey A. Bogdanov, J. M. Landgraf, B. Pawlik, V. P. Kanavets, Jing Li, B. V. Morozov, L. I. Koroleva, C. Pearson, L. Whitehead, A. Sandacz, A. Drees, K. Yip, I. G. Alekseev, M. Haguenauer, P. Pile, Nurcan Ozturk, Mikhail N. Strikhanov, S. B. Nurushev, Michael Rijssenbeek, M.F. Runtzo, D. N. Svirida, S. Yeung
Rok vydání:	2007
Předmět:	Elastic scattering Physics Nuclear and High Energy Physics Particle physics Range (particle radiation) Proton media_common.quotation_subject Momentum transfer Helicity Asymmetry Nuclear physics High Energy Physics::Experiment Nuclear Experiment Relativistic Heavy Ion Collider media_common Spin-½
Zdroj:	Physics Letters B. 647:98-103
ISSN:	0370-2693
DOI:	10.1016/j.physletb.2007.01.067
Popis:	We present the first measurements of the double spin asymmetries A N N and A S S at s = 200 GeV , obtained by the PP2PP experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). The data were collected in the four momentum transfer t range 0.01 ⩽ | t | ⩽ 0.03 ( GeV / c ) 2 . The measured asymmetries, which are consistent with zero, allow us to estimate upper limits on the double helicity-flip amplitudes ϕ 2 and ϕ 4 at small | t | as well as on the difference Δ σ T between the total cross sections for transversely polarized protons with antiparallel or parallel spin orientations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::073a99c084bf31b26d40caf5d402b891 https://doi.org/10.1016/j.physletb.2007.01.067 Zobrazit plný text záznamu Full Text from ScienceDirect