Microscopic description of the A(p, π)A + 1 reaction

Alons, P.W.F.; Bent, R.D.; Conte, J.S.; Dillig, M.

doi:10.1016/0375-9474(88)90458-7

Cited by 31 publications

(21 citation statements)

References 46 publications

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“…Moreover, the inclusion of such "few-step" processes implies some "sharing" of the total momentum transfer and it also can be effectively lead to the additional growth of the cross section. It is worth mentioning that such "few-step" contributions were found to be important, for example, in the exclusive processes 3He(~, t/) t [4], A (p, re) A + 1 [5], and in inclusive reaction A(p,I? )X [6].…”

Section: Formalismmentioning

confidence: 99%

Estimates of hypernuclear production via the exclusive (p, K+) reaction

Krippa

1995

Z. Physik A - Hadrons and Nuclei

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Abstract.We investigate the possibility of producing hypernuclei with proton beams via (p,K +) reaction. We present differential cross sections calculations utilizing the distorted wave impulse approximation in momentum space. We consider the reactions lZC(p,K+)~3C and 160(p,K+)lA70 within the energy region 0.8GeV-1.2 GeV. We study both the case of formation of A in S-state (12C) and P-state (160). We take into account the contribution of both one-step and two-step processes when AK pair is produced directly by incoming proton and intermediate pion, respectively. It is found that practically in all cases the two-step processes give significant contribution. PACS: 2t.80properties of A-nuclear mean-field and effective A-N interactions.The pA --'A BK + reaction seems to have an advantage in these two points [3]. However, caused by the very large momentum transfer ( ~ 1 GeV/c) the probability of hypernuclei formation becomes very small. Nevertheless high proton beam intensities available at present might help in getting measurable signals of the hypernuclei and therefore proton-induced exclusive kaon production merits further study.In this paper the exclusive pA ~A BK § reaction is studied and the theoretical estimations of the possible cross section are presented.Our paper is organized as follows. In the next section we outline our formalism and then we discuss the results of our calculations. We conclude with suggestion for possible future calculations of similar processes.

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Section: Formalismmentioning

confidence: 99%

Estimates of hypernuclear production via the exclusive (p, K+) reaction

Krippa

1995

Z. Physik A - Hadrons and Nuclei

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“…This could lead to larger cross sections. Moreover, in the TNM studies of other large momentum transfer reactions like (p, π), (γ, π), and (γ, η) the distortion effects have been found to be less pronounced [13,14]. This type of two-nucleon model has not yet been applied to the study the A(p, K + ) Λ B reaction.…”

Section: Introductionmentioning

confidence: 99%

“…[15]). Furthermore, in the non-relativistic description one must resolve the ambiguities of the pion-nucleon-nucleon vertex that result from the non-relativistic reduction of the full covariant pion-nucleon-nucleon vertex (see, e.g., [13,15,16] for more details).…”

Section: Introductionmentioning

confidence: 99%

ExclusiveK+production in proton-nucleus collisions

2004

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The exclusive K + meson production in a proton-nucleus collision, leading to two body final states, is investigated in a fully covariant two-nucleon model based on the effective Lagrangian picture. The explicit kaon production vertex is described via creation, propagation and decay into relevant channel of N * (1650), N * (1710) and N * (1720) intermediate baryonic states in the initial collision of the projectile nucleon with one of its target counterparts which is modeled by the onepion exchange process. The calculated cross sections show strong sensitivity to the medium effects on pion propagator and to the final hypernuclear state excited in the reaction.PACS numbers: 25.40.V e, 13.75. − n,, 13.75.Jz

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“…[19]). Furthermore, in the non-relativistic description one must resolve the ambiguities of the pion-nucleon-nucleon vertex that result from the non-relativistic reduction of the full covariant pionnucleon-nucleon vertex (see, e.g., [17,19,20] for more details). This is important as this vertex is used to describe the initial collision between the incoming proton and the target nucleus.…”

Section: Introductionmentioning

confidence: 99%

A relativistic two-nucleon model for reaction

2006

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We investigate the A(p, K + ) Λ B reaction within a covariant two nucleon model. We focus on amplitudes which are described by creation, propagation and decay into relevant channel of N * (1650), N * (1710), and N * (1720) intermediate baryonic resonance states in the initial collision of the projectile nucleon with one of its target counterparts This collision is modeled by the exchange of π as well as ρ and ω mesons. The bound state nucleon and hyperon wave functions are obtained by solving the Dirac equation with appropriate scalar and vector potentials. Expressions for the reaction amplitudes are derived taking continuum particle wave functions in both distorted wave and plane wave approximations. Detailed numerical results are presented in the plane wave approximation; estimates of the effects of the initial and final state interactions are given in the eikonal approximation. Cross sections of 1 -2 nb/sr at the peak positions, are obtained for favored transitions in case of heavier targets. PACS numbers: 25.40.V e, 13.75. − n,, 13.75.Jz

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Microscopic description of the A(p, π)A + 1 reaction

Cited by 31 publications

References 46 publications

Estimates of hypernuclear production via the exclusive (p, K+) reaction

Estimates of hypernuclear production via the exclusive (p, K+) reaction

ExclusiveK+production in proton-nucleus collisions

A relativistic two-nucleon model for reaction

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