Student's Abstracts

    Hamburan Partikel Berspin 0 dan ½ Dalam Basis Momentum-Helicity
    (Scattering of spin-0 and spin-½ particles in the momentum-helicity basis)
    Irga Abdulrahman     (graduated 2006)
    Supervisor: Imam Fachruddin

    Abstract
    Scattering of 2 particles of spin 0 and ½ is evaluated by means of a technique, which uses the momentum-helicity basis. Using this so called three-dimensional technique, the T-matrix elements are calculated as solution of the Lippmann-Schwinger equation, as well as the differential cross section and the polarization. As input a simple spin-orbit potential model is used. Relativistic kinematics effects are also investigated.

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    Model potensial kaon-nukleon fenomenologis
    (A phenomenological model of kaon-nucleon potential)
    Victor G. P. Matindas     (graduated 2007)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    We make a phenomenological model for kaon-nucleon (KN) interaction. The potential consists of central and spin-orbit terms, with the radial functions being of the Malfliet-Tjon form. The potential parameters are determined by fitting to the KN phase shifts for kaon laboratory energy up to about 230 MeV. The calculation is performed using a so called three-dimensional technique, which uses a basis constructed from the momentum-vector and the helicity eigenstates.

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    Hamburan kaon-nukleon dalam model pertukaran hyperon
    (Kaon-nucleon scattering in hyperon-exchange model)
    Ryky Nelson     (graduated 2007)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    A potential model is made for kaon-nucleon (KN) interaction. This potential is derived from the Feynman diagram for the hyperon exchange reaction of lowest order. This potential is fitted to the KN total cross section to get the coupling constant. The calculation is performed using a so called three-dimensional technique, which uses a basis constructed from the momentum-vector and the helicity eigenstates.

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    Interaksi KN berdasarkan lagrangian efektif
    (KN interaction based on effective lagrangian)
    Lomario     (graduated 2011)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    The KN interaction can be described by a model, i.e. one meson exchange and one baryon exchange model. Both the K^+N and the K^-N interactions are derived using second-order contributions. The contributions of each exchanged particle are investigated. The cross section and some spin observables for the K^+N and K^-N scattering processes based on the first Born approximation are calculated.

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    Model pertukaran hyperon dan sigma untuk hamburan kaon-nukleon
    (Hyperon and sigma exchange model for kaon-nucleon scattering)
    Agus Jarwanto     (graduated 2011)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    A KN interaction model is made. This potential is derived from Feynmann diagrams for hyperon and sigma exchange reactions. The resulting potential is used to calculate the differential cross section and some spin observables.

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    Efek coulomb pada hamburan kaon-nukleon
    (Coulomb effects on kaon-nucleon scattering)
    Fahmi Maulida     (graduated 2012)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    Kaon-nucleon scattering is calculated using a three-dimensional technique. The interaction being used is that of the simple meson exchange model with coulomb admixture. The coulomb interaction being taken is of the type of screened coulomb potential. The scattering cross section and some spin observables are calculated showing some coulomb effects.

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    Efek relativistik pada hamburan kaon-nukleon dalam basis tiga dimensi
    (Relativistic effects on kaon-nucleon scattering in three-dimensional basis)
    Rahadian Nopriantoko     (graduated 2012)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    Kaon-nucleon scattering is formulated in three-dimensional momentum-spin basis. The interaction being used is based on Yukawa potential model with a spin-orbit force. We apply relativistic kinematics and investigate some relativistic effects for various energy on the differential cross section and some spin observables.

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    Perhitungan 3D untuk hamburan K^{+}p dengan efek relativistik
    (3D calculations for K^{+}p scattering with relativistic effects)
    Miranda Rizka Anggraini     (graduated 2014)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    K^{+}p scattering is calculated in a three-dimensional basis applying relativistic kinematics. As input we take a model of meson- and hyperon-exchange interaction up to second order. Relativistic efetcs are observed for various energies on the differential cross section and some spin observables.

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    Verifikasi perhitungan partial wave untuk hamburan K^{+}p
    (Verification of partial wave calculations of K^{+}p scattering)
    Khairi Trisnayadi     (graduated 2014)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    K^{+}p scattering is calculated using the standard partial wave technique in momentum space. The second order contribution of a hadron exchange interaction model for K^{+}N potential is taken as input. This interaction consists of exchanges of a scalar meson \sigma, vector mesons \rho and \omega, hyperons \Lambda and \Sigma. We compare the calculations for the differential cross section and some spin observables with those obtained by means of a three-dimensional technique to verify the convergence of the PW calculations.

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    Verifikasi perhitungan partial wave untuk hamburan K^{+}n
    (Verification of partial wave calculations of K^{+}n scattering)
    L'dy Mascow Abdullah     (graduated 2014)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    K^{+}n scattering is calculated by applying the standard partial wave (PW) technique as well as a three-dimensional (3D) technique in momentum space. The PW calculations are compared to the 3D ones in order to verify the convergence of the PW calculations. The observables being calculated are the differential cross section, the neutron's polarization and depolarization. As input we take a model of K^{+}N interaction based on exchanges of mesons and hyperons up to second order.

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    Efek relativistik pada hamburan K^{+}n
    (Relativistic effetcs on K^{+}n scattering)
    Putu Adi Kusuma Yudha     (graduated 2014)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    K^{+}n scattering is calculated in a three-dimensional momentum space basis. As input we take a model of K^{+}N interaction described as exchanges of mesons and hyperons up to second order. Two kinds of calculations are carried out, that is one with nonrelativistic kinematics and the other with relativistic kinematics. By comparing the two kinds of calculations we observe some relativistic effects on K^{+}n scattering for various energies.

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    Perbandingan perhitungan partial-wave dan 3D untuk hamburan K^{-}n serta studi efek kinematika relativistik
    (Comparison of partial-wave and 3D calculations for K^{-}n scattering and study of relativistic kinematics effects)
    Yasir Arafat     (graduated 2014)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract

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    Perhitungan partial-wave dan relativistik untuk hamburan K^{-}p
    (Partial-wave and relativistic calculations for K^{-}p scattering)
    Haryanto     (graduated 2014)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract

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    Model interaksi K^{+}p berdasarkan pertukaran satu hadron
    (Interaction model of K^{+}p based on one-hadron exchanges)
    Fitya Fikriyah     (graduated 2016)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    A model of K^{+}p interaction is formulated based on one-hadron exchanges, which is adapted from a more complex model. The exchanged hadrons are σ, ρ, ω, Λ and Σ. The parameters of the model are obtained by means of fitting processes to data of differential cross section for laboratory energy range of 21 MeV upto 669 MeV. The scattering calculation is performed using a three-dimensional technique. We get a χ2/N of 2.4

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    Model interaksi K^{-}p berdasarkan pertukaran satu hadron
    (K^{-}p interaction model based on one-hadron exchanges)
    Abdul Lathiif A. Alam     (graduated 2017)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    Model of K^{−}p interaction is constructed based on one-hadron exchanges. The exchanged hadrons being considered are σ, ρ, ω, Λ and Σ. The parameters of the model are obtained by fitting theoretical values to experimental data of differential cross section for laboratory energy range of 50 MeV - 225 MeV. Theoretical values of the differential cross section are calculated using a three-dimensional technique. We obtain K^{−}p interaction model, which is good enough to reproduce experimental data with χ2/N value being 1.8.

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    Model potensial pertukaran satu hadron untuk K^{+}p
    (Potential model based on one hadron exchange for K^{+}p)
    Miranda Rizka Anggraini     (graduated 2017)
    Supervisors: Imam Fachruddin, Agus Salam

    Abstract
    A model of K^{+}p potential is derived based on K^{+}N interactions. The model is constructed as a one-hadron-exchange potential for simplicity. The hadrons being exchanged are σ, δ, ρ, ω, Λ, and Σ. The potential’s parameters are determined by means of fitting processes to K^{+}p scattering data, which are the spin averaged differential cross sections, for energies of about 21 MeV upto 669 MeV. These parameters are the cutoff-parameters for the form factors, σ mass, δ mass, and the coupling constants. Theoretical data are produced without partial wave expansion by employing a three-dimensional technique for KN scattering.

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    Model potensial pertukaran-satu-hadron untuk interaksi K^{-}p
    (K^{-}p one-hadron-exchange potential model)
    Khairi Trisnayadi     (graduated 2017)
    Supervisors: Agus Salam, Imam Fachruddin

    Abstract
    We present a one-hadron-exchange potential model for K^{−}p interaction. The parameters are determined by fitting with the experiment data of K^{−}p scattering. We calculate the K^{−}p scattering in a three-dimensional basis. The fitted parameters consist of the cut-off masses and the coupling constants for σ, ρ, ω, Λ and Σ exchanges, as well as the mass of σ. The fitting processes are performed for energies from 51.23 MeV up to 884.84 MeV.

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