Abstract
In experiment PAX, proposed for the new accelerator complex at GSI, investigations in the field of high-energy spin physics with the use of a polarized antiproton beam are planned. In this paper the possibilities for triggering are considered taking into account the PAX detector properties and a probable configuration of the trigger system is discussed for the first time.
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References
PAX collab., “Antiproton-Proton Scattering Experiments with Polarization,” Technical Proposal, hepex/0505054 v1 (2005).
L. Aysto et al., An International Accelerator Facility for Beams of Ions and Antiprotons. Conceptual Design Report (GSI, 2001).
F. Rathmann et al., “New Method to Polarize Protons in a Storage Ring and Implications to Polarize Antiprotons,” Phys. Rev. Lett. 71(9), 1379–1381 (1993).
H. O. Meyer, Phys. Rev. E 50(2), 1485–1490 (1994); C. J. Horowitz and H. O. Meyer, Phys. Rev. Lett. 72 (25), 3981–3984 (1994); A. I. Milstein and V. M. Strakhovenko, Phys. Rev. E 72, 066503-1–066503-5 (2005); N. N. Nikolaev and F. F. Pavlov, hep-ph/0512051; N. N. Nikolaev and F. F. Pavlov, hep-ph/0601184. For the recent 2006 review see: Update of Technical Proposal for PAX, AppendixG. http://www.fz-juelich.de/ikp/pax/news/news_files/TP_Add_update.pdf.
For review on the transverse spin structure of the proton, see: V. Barone, A. Drago, and P. Ratcliffe, “Transverse Polarization of Quarks in Hadrons,” Phys. Rep. 359(1–2), 1–168 (2002).
R. Maier, “Cooler Synchrotron COSY—Performance and Perspectives,” Nucl. Instrum. Methods Phys. Res., Sect. A 390(1–2), 1–8 (1997).
D. Sivers, “Single-Spin Production Asymmetries from the Hard Scattering of Pointlike Constituents,” Phys. Rev. D 41(1), 83–90 (1990); “Hard-Scattering Scaling Laws for Single-Spin Production Asymmetries,” Phys. Rev. D: Part. Fields 43 (1), 261–263 (1991).
J. C. Collins, “Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions,” Nucl. Phys. B 396(1), 161–182 (1993).
Particle Data Group. Available from http://pdg.lbl.gov.
S. Bagnasco et al., “The Threshold Gas Cherenkov Counter of Charmonium Experiment 835 at Fermilab,” Nucl. Instrum. Methods Phys. Res., Sect. A 424(2–3), 304–320 (1999).
A. Kulikov, “Triggering at Storage Rings,” in Proc. of the 6th Intern. Conf. on Nuclear Physics at Storage Rings (STORI’05), Julich-Bonn, Germany, May 23–26, 2005 (Forschungszentrum Julich); Matter and Materials 30, 394–397 (2005).
See, for example: S. S. Adler et al., “PHENIX On-Line Systems,” Nucl. Instr. Meth. A 499(2–3), 560–592 (2003); B. Aubert et al., “The BABAR Detector,” Nucl. Instr. Meth. A 479 (1), 1–116 (2002); E. K. E. Gerndt et al., “HERA-B: Trigger System,” Nucl. Instr. Meth. A 446 (1–2), 264–273 (2000).
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The text was submitted by the authors in English.