摘要:

The possibility of accelerating polarized deuterons in the AGS and RHIC is discussed. In the AGS, the polarized deuteron can be accelerated up to 15 GeV/c without depolarization. In RHIC, the snake designed for use in accelerating polarized protons are applicable as partial snake in inducing spin flip to overcome the imperfection resonances. Gradient error resonances in RHIC are found to be negligible. Difficulties arise from intrinsic resonances in RHIC, which limit the polarized deuteron collision energy to less than &ggr;≤29 or to energy less than 27.2 GeV/u, if corrections are not made. A type 3 snake is found to be impractical for a spin tune jump. Betatron tune jump by using quadrupoles or induced betatron oscillations may be used to jump through intrinsic resonances. The achievable luminosity is found to about 2⋅1030cm−2s−1at &ggr;≊30. If intrinsic resonances can be overcome, one expects to obtain higher energy and higher luminosity.

ISSN:0094-243X    

DOI:10.1063/1.40503

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

We present the one‐loop pure glue correction to polarizedgg→ggscattering. The computation is performed using a new and efficient technique for calculating loop amplitudes in a gauge theory. The technique is based on the technology of four‐dimensional heterotic superstrings.

ISSN:0094-243X    

DOI:10.1063/1.40513

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

The Wandzura‐Wilczek and Burkhardt‐Cottingham sum rules have been used to suggest a relation between the distributions of transversely and longitudinally polarized quarks, and to deduce that there is little transverse quark polarization in the valence region, contrary to the situation for longitudinal polarization. It is shown that these deductions are unjustified.

ISSN:0094-243X    

DOI:10.1063/1.40504

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

While the thrust of this workshop has been toward the physics of spin dependent hard scattering of partons at collider energies, there has been an attempt to connect the discussion of a new program with the rich tradition of fixed target experiments at lower energies and tranverse momenta. Several contribution to this workshop are discussed in this context.

ISSN:0094-243X    

DOI:10.1063/1.40505

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

In this article on the EMC results, we would like to note the points on which the various groups agree.

ISSN:0094-243X    

DOI:10.1063/1.40506

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

A panel discussion was held on the prospects for polarized collider physics. J. Soffer was the moderator. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.40507

出版商:AIP    

年代:1991

数据来源: AIP