Showing papers by "Andreas Lehrach published in 2010"
TL;DR: In this article, the spin dynamics of the polarized deuteron beam were studied by depolarizing the beam through the use of an artificially induced spin resonance, and it was possible to evaluate its momentum with a precision of roughly $3.
Abstract: In order to measure the mass of the $\ensuremath{\eta}$ meson with high accuracy using the $dp\ensuremath{\rightarrow}^{3}\mathrm{He}\ensuremath{\eta}$ reaction, the momentum of the circulating deuteron beam in the Cooler Synchrotron COSY of the Forschungszentrum J\"ulich has to be determined with unprecedented precision. This has been achieved by studying the spin dynamics of the polarized deuteron beam. By depolarizing the beam through the use of an artificially induced spin resonance, it was possible to evaluate its momentum $p$ with a precision of $\ensuremath{\Delta}p/pl{10}^{\ensuremath{-}4}$ for a momentum of roughly $3\text{ }\text{ }\mathrm{GeV}/c$. Different possible sources of error in the application of the spin-resonance method are discussed in detail and its possible use during a standard experiment is considered.
16 citations
23 May 2010
TL;DR: In this paper, the PANDA detector was used to construct an electron-nucleon collider at the FAIR facility, which would collide the stored 15 GeV polarized proton beam in the HESR with a polarized 3.3 GeV electron beam circulating in an additional storage ring.
Abstract: To facilitate studies of collisions between polarized electron and protons at {radical}s = 14 GeV; constructing an electron-nucleon collider at the FAIR facility has been proposed. This machine would collide the stored 15 GeV polarized proton beam in the HESR with a polarized 3.3 GeV electron beam circulating in an additional storage ring. We describe the interaction region design of this facility, which utilizes the PANDA detector.
3 citations
01 Jan 2010
TL;DR: In this paper, the spin dynamics of the polarized deuteron beam were used to determine the mass of the meson with high accuracy using the d p! 3 Heη reaction.
Abstract: In order to measure the mass of theη meson with high accuracy using the d p ! 3 Heη reaction, the momentum of the circulating deuteron beam in the Cooler Synchrotron COSY of the Forschungszentrum Julich has to be determined with unprecedented precision. This has been achieved by studying the spin dynamics of the polarized deuteron beam. By depolarizing the beam through the use of an artificially induced spin resonance, it was possible to evaluate its momentum p with a precision ofp/p< 10 4 for a momentum of roughly 3 GeV/c.
1 citations