Covariant Methods for Calculating Differential Cross Sections and Polarization Characteristics of Reactions

Sikach, S. M.
June 2005
Physics of Atomic Nuclei;Jun2005, Vol. 68 Issue 6, p1064
Academic Journal
A covariant method for calculating reaction amplitudes in the diagonal spin basis is presented. In this basis, amplitudes represent the spin kinematics of the interacting particles in the simplest and most adequate manner. A matrix is obtained such that differential cross sections for polarized particles and amplitude combinations that are required to calculate various polarization characteristics of reactions can be expressed in an arbitrary basis in terms of the amplitudes calculated in one basis.© 2005 Pleiades Publishing, Inc.


Related Articles

  • A new approach to parton-density evolution. Goshtasbpour, Mehrdad; Ratcliffe, Philip G. // AIP Conference Proceedings;2001, Vol. 570 Issue 1, p879 

    Polarized p-p collisions at RHIC with 50<√s<500 GeV will provide us new information on the spin structure of the nucleon. Using the PHENIX detector, we plan to measure the double-longitudinal spin asymmetry (A[sub LL]) for the heavy-flavor production which is sensitive to the gluon...

  • SuperBeam Experiments: T2K, NOvA and Beyond. Zito, Marco // AIP Conference Proceedings;3/30/2010, Vol. 1222 Issue 1, p10 

    We present the accelerator-based experiments, T2K and later NOvA, that will lead the quest for θ13. We then summarize the plans for intense proton machines and long-baseline neutrino oscillation experiments at J-PARC and Fermilab. We finally describe the current activities towards a SuperBeam...

  • Precise Results on g1p and g1d and First Measurement of the Tensor Structure Function b1d with the HERMES-Experiment. Reggiani, Davide; Smith, W. H.; Dasu, S. R. // AIP Conference Proceedings;2005, Vol. 792 Issue 1, p913 

    Precise results on the spin-dependent structure functions g1p(x,Q2) and g1d(x,Q2) over the kinematic range 0.0021 < x < 0.9 and 0.1 < Q2 < 20 GeV2 are presented. The analyses base on data collected at the HERMES experiment at DESY in polarized deep-inelastic scattering and make use of an...

  • The effect of temperature and pairing on nuclear pseudospin symmetry. Malheiro, M.; Lisboa, R.; Carlson, B. V.; Alberto, P. // AIP Conference Proceedings;6/3/2009, Vol. 1139 Issue 1, p119 

    We study the effects of temperature andpairing on pseudospin symmetry in spherical and deformed nucleus using the Dirac—Hartree—Bogoliubov (DHB) formalism. We include temperature in the DHB equation using the Matsubara formalism and analyze changes in the neutron single particle...

  • Recoil proton distribution in high energy photoproduction processes. Bartoš, E.; Kuraev, E.A.; Peresunko, Y.P.; Vinokurov, E.A. // European Physical Journal C -- Particles & Fields;Sep2007, Vol. 52 Issue 1, p173 

    For high energy linearly polarized photon–proton scattering we have calculated the azimuthal and polar angle distributions on a recoil proton in the inclusive experimental setup. We have taken into account the production of lepton and pseudoscalar meson charged pairs in the point-like...

  • Sub-Barrier Coulomb Excitation of 106,108,110Sn. Ekström, A.; Cederkäll, J.; Fahlander, C.; Hjorth-Jensen, M.; Ames, F.; Butler, P. A.; Davinson, T.; Eberth, J.; Georgiev, G.; Gorgen, A.; Górska, M.; Habs, D.; Huyse, M.; Ivanov, O.; Iwanicki, J.; Kester, O.; Köster, U.; Marsh, B. A.; Reiter, P.; Scheit, H. // AIP Conference Proceedings;5/12/2008, Vol. 1012 Issue 1, p296 

    The reduced transition probabilities between the first excited 2+ state and the 0+ ground state, B(E2;0+→2+), have been measured in 106,108,110Sn using sub-barrier Coulomb excitation in inverse kinematics at REX-ISOLDE. The results are, B(E2;0+→2+) = 0.220(22), 0.226(17), and...

  • Effect of tunneling on the thermoelectric efficiency of bulk nanostructured materials. Bulat, L. P.; Pshenaĭ-Severin, D. A. // Physics of the Solid State;Mar2010, Vol. 52 Issue 3, p485 

    The possibility of increasing the thermoelectric figure of merit for bulk nanostructured materials has been investigated theoretically. The kinetic coefficients of the nanostructured material have been calculated and evaluated under the assumption that the dominant role in the transfer is played...

  • Ï€0 Transverse Single-Spin Asymmetries at η = 4.1 in p+p Collisions at s = 200 GeV. Drachenberg, J. L. // AIP Conference Proceedings;8/4/2009, Vol. 1149 Issue 1, p517 

    Large transverse single-spin asymmetries, AN, have been observed in forward hadron production at RHIC. STAR has reported precision measurements of the xF-pT dependence of AN for forward π0 production. Contrary to expectation, the asymmetry does not fall with pT. However, questions remain...

  • The g2 Structure Function. Slifer, K. // AIP Conference Proceedings;8/4/2009, Vol. 1149 Issue 1, p130 

    We will discuss recent results for the spin structure functions, with an emphasis on g2. High precision g2 data allows for tests of the Burkhardt-Cottingham sum rule, and is needed to consistently evaluate higher twist effects.

  • Ion bombardment in RF guns. Pozdeyev, E.; Kayran, D.; Litvinenko, V. N. // AIP Conference Proceedings;8/4/2009, Vol. 1149 Issue 1, p1109 

    We use the ponderomotive potential of the RF field to study the motion of ions in an RF gun. We apply this method to the BNL 1/2-cell SRF photogun and demonstrate that a significant portion of the ions produced in the gun can reach the cathode if no special precautions are taken. Also, we...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics