K+p elastic scattering at 12.7 GeV/c

Jain, Priyanka; Swissler, Thomas J.; Primer, M.; Shivpuri, R. K.; Evans, D.; Stone, S.; Ferbel, T.; Slattery, P.; Yuta, H.

doi:10.1016/0550-3213(70)90368-8

Cited by 29 publications

(33 citation statements)

References 4 publications

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“…Talmi further incorporated the nondegeneracy of the multi-j orbitals by using S + = j α j S + j , where α j are the mixing coefficients [70,71]. Our recent extension of this scheme for multi-j degenerate orbitals by defining S + = j (−1) lj S + j , as proposed by Arvieu and Moszokowski [72], led to a new set of generalized seniority selection rules and the corresponding generalized seniority reduction formulae [62][63][64][65][66][67]. Here l j denotes the orbital angular momentum of the given-j orbital.…”

Section: Seniority and Generalized Senioritymentioning

confidence: 99%

“…Our recent extension of the seniority scheme to the generalized seniority scheme [62][63][64][65][66] has offered a simplified view of the complex structure of various states in semi-magic nuclei and successfully explained a number of spectroscopic properties like the energy spectra, B(EL) trends and half-lives etc. We have recently extended the usage of generalized seniority scheme to understand the magnetic moments, or the g-factor trends and termed it as Generalized Seniority Schmidt Model(GSSM), where we merge the configurations suggested by generalized seniority with the Schmidt model and obtain the g-factor trends [67].…”

Section: Introductionmentioning

confidence: 99%

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Evolution of nuclear structure in and around Z = 50 closed shell: Generalized seniority in Cd, Sn and Te isotopes

2019

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We study the quadrupole moments and the B(E2; 2 + → 0 + ) values for the 11/2 − states and the first 2 + states, respectively, by using a multi-j generalized seniority approach in the Cd (Z = 48), Sn (Z = 50) and Te (Z = 52) isotopic chains. The g-factor trends have also been discussed. Although, Cd and Te isotopes represent two-proton hole and two-proton particle systems, thus involving both kind of particles (protons and neutrons) in contrast to Sn (Z = 50) where only neutrons play a role, we find that a similar model based on neutron valence space alone is able to explain nearly all the gross features and trends. This paper represents the first attempt to test the validity of the generalized seniority scheme away from the semi-magic region and appears to be surprisingly successful. The linearly varying quadrupole moments in Cd, Sn and Te isotopes, are described by using a consistent multi-j configuration. The asymmetric double-hump behavior of B(E2) values in Cd and Te isotopes are understood in a manner identical to that of Sn isotopes by using the generalized seniority scheme for the first time. No shell quenching is supported in the calculations; hence, the neutron magic numbers, N = 50 and N = 82, remain robust in these isotopic chains.

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Section: Seniority and Generalized Senioritymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evolution of nuclear structure in and around Z = 50 closed shell: Generalized seniority in Cd, Sn and Te isotopes

2019

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“…We have found from the available literature suitable experimental data on the angular distributions of the elastic differential cross sections a t 73 energies for K-p scattering [16-351 and at 49 energies for K+p scattering [33, [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. For each energy a t which a reliable extrapolation to the forward direction was made in the paper originally reporting the experimental data, we' used the reported value of (du/dQ), or (duldt), for our determination of the real part of the forward scattering amplitude.…”

Section: The Data Compilationmentioning

confidence: 99%

Experimental Knowledge of the Real Parts of the K±p Forward Scattering Amplitudes

Dumbrais

Queen

1971

Fortschr. Phys.

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A compilation of experimentally determined values of the real parts of the K±p forward scattering amplitudes is given in a form in which these data may be used directly in analyses of forward dispersion relations. The methods of determining these real parts from experimental data are briefly reviewed and a survey of K±p low‐energy parametrizations and phase shift analyses is given. A summary is given of the theoretical determinations of the real parts.

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“…That is the confinement of quarks and gluons is included in the model. 3. The two minima of the self-interaction of the scalar field (eq(2)) can be identified with the perturbative and physical vacua of the MIT bag model [14].…”

Section: A Lagrangianmentioning

confidence: 99%

“…It must be noted that the monopole form is, as such, purely phenomenological and is possibly not related to the underlying structure of the hadrons.The form factors used in earlier calculations [2] were 'hard' with the cut-off parameters Λ ≥ 1GeV . There are, however, recent calculations [3] which indicate that softer form factors (Λ ∼ 500M eV ) are required to fit ∆ production on nuclei. Some indication of the value of cut-off parameter Λ is available from low energy phenomenology.…”

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confidence: 99%

Meson-baryon form factors in the chiral color dielectric model

Phatak

1998

Phys. Rev. C

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The renormalised form factors for pseudoscalar meson-baryon coupling are computed in chiral colour dielectric model. This has been done by rearranging the Lippmann-Schwinger series for the meson baryon scattering matrix so that it can be expressed as a baryon pole term with renormalized form factors and baryon masses and the rest of the terms which arise from the crossed diagrams. Thus we are able to obtain an integral equation for the renormalized meson-baryon form factors in terms of the bare form factors as well as an expression for the meson self energy. This integral equation is solved and renormalized meson baryon form factors and renormalized baryon masses are computed. The parameters of the model are adjusted to obtain a best fit to the physical baryon masses. The calculations show that the renormalized form factors are energy-dependent and differ from the bare form factors primarily at momentum transfers smaller than 1 GeV. At nucleon mass, the change in the form factors is about 10% at zero momentum transfer. The computed form factors are soft with the equivalent monopole cut-off mass of about 500 MeV. The renormalized coupling constants are obtained by comparing the chiral colour dielectric model interaction Hamiltonian with the standard form of meson-nucleon interaction Hamiltonian. The ratio of ∆N π and N N π coupling constants is found to be about 2.15. This value is very close to the experimental value.PACS numbers: 12.39. Ki, 12.39.Fe, 13.75.Gx I. INTRODUCTIONThe meson-baryon form factors are interesting and useful quantities for several reasons. For one thing, we expect the form factors to have some bearing on the underlying structure of the hadrons. For example, in perturbative chiral quark models [1] the pion-baryon form factors are directly related to the quark wavefunctions in baryons. Form factors are essential in the effective models of meson-baryon interactions since hadrons, after all, are not point particles. One also needs these form factors for a consistant description of nuclear phenomena. The meson exchange nucleon-nucleon potentials include phenomenological vertex form factors which are presumably related to the structure of hadrons. Form factors are also needed in computation of photo-and electro-production of baryon resonances since, in principle, the photon can couple to the virtual charged meson cloud in a baryon. Another technical reason for introducing the form factors is that the effective meson-baryon interaction models are, generally, not renormalizable and the form factors provide the needed cut-off functions.Usually, the form factors employed in the meson-baryon interaction models are of monopole type ( ∼ 1 1−k 2 /Λ 2 ) with k 2 being the four momentum carried by the meson. It must be noted that the monopole form is, as such, purely phenomenological and is possibly not related to the underlying structure of the hadrons.The form factors used in earlier calculations [2] were 'hard' with the cut-off parameters Λ ≥ 1GeV . There are, however, recent calculations [3] which indi...

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K+p elastic scattering at 12.7 GeV/c

Cited by 29 publications

References 4 publications

Evolution of nuclear structure in and around Z = 50 closed shell: Generalized seniority in Cd, Sn and Te isotopes

Evolution of nuclear structure in and around Z = 50 closed shell: Generalized seniority in Cd, Sn and Te isotopes

Experimental Knowledge of the Real Parts of the K±p Forward Scattering Amplitudes

Meson-baryon form factors in the chiral color dielectric model

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