[en] This paper provides a concise summary of the current status of the research and future perspectives discussed in the Mini-Conference on Angular Momentum Transport in Laboratory and Nature. This Mini-conference, sponsored by the Topical Group on Plasma Astrophysics, was held as part of the American Physical Society's Division of Plasma Physics 2007 Annual Meeting (November 12-16, 2007). This Mini-conference covers a wide range of phenomena happening in fluids and plasmas, either in laboratory or in nature. The purpose of this paper is not to comprehensively review these phenomena, but to provide a starting point for interested readers to refer to related research in areas other than their own

[en] The system created in non-central relativistic nucleus-nucleus collisions possesses large orbital angular momentum. Due to spin-orbit coupling, particles produced in such a system could become globally polarized along the direction of the system angular momentum. We present the results of Lambda and anti-Lambda hyperon global polarization measurements in Au+Au collisions at sqrt sNN=62.4 GeV and 200 GeV performed with the STAR detector at RHIC. The observed global polarization of Lambda and anti-Lambda hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, lbar P Lambda, anti-Lambda rbar<= 0.02, is compared to the theoretical values discussed recently in the literature

[en] We present the Poincare algebra interpolating between instant and light-front time quantizations. The angular momentum operators satisfying SU(2) algebra are constructed in an arbitrary interpolation angle and shown to be identical to the ordinary angular momentum and Leutwyler-Stern angular momentum in the instant and light-front quantization limits, respectively. The exchange of the dynamical role between the transverse angular mometum and the boost operators is manifest in our newly constructed algebra

[en] This note contains a discussion of various expansions of the angular momentum projection operator in terms of the operators J+, J- and Jo. This gives us opportunity to rederive the famous Loewdin's shift operator formula. As a starting point the integral representation of the projector is used, which is done in a somewhat different way than that proposed by Raynal. (orig.)

No abstract available

[en] Short communication. 5 refs

[en] The eigenvalue j(j+1) of the total angular momentum operator squared J² follows from the commutation relations for angular momentum. An alternative proof is given based on the uncertainty relation for the angular momentum components J₁ and J₂. For expectation values in the state vertical bar j, j>, the uncertainty relation holds as an equality and is used in the proof. (author)

[en] It is shown how the number of J-states in a configuration can be calculated approximately. A particularly simple method for obtaining the moments of Jsub(z) is presented. Starting from a simple Gaussian approximation to the distribution of M, the total projection of angular momentum, it is natural to make an expansion in terms of the cumulants of the distribution. Results from various approximations are compared with the exact values. It is found that an expansion due to Edgeworth gives more reliable results than the Gram-Charlier series. (orig.)

[en] We discuss some remarkable features of the light-front holographic mapping of classical gravity in anti-de Sitter space modified by a confining dilaton background. In particular, we show that a positive-sign dilaton solution exp(+k²z²) has better chances to describe the correct hadronic phenomenology than the negative solution exp (-k²z²) extensively studied in the literature. We also show that the use of twist-scaling dimensions, instead of canonical dimensions, is required to give a good description of the spectrum and form factors of hadrons. Another key element is the explicit connection of AdS modes of total angular momentum J with the internal structure of hadrons and the proper identification of the orbital angular momentum of the constituents.

[en] A summary of arguments as to why the Aharonou-Bohm effect (AB) cannot be removed from quantum mechanics without spoiling the conservation and quantization of angular momentum. 8 refs