Abstract
We investigate Ξ(1690)- production from the K-p→K+K-Λ reaction within the effective Lagrangian approach at the tree-level Born approximation. We consider the s- and u-channel Σ/Λ ground states and resonances for the Ξ-pole contributions, in addition to the s-channel Λ, u-channel nucleon pole, and t-channel K- exchange for the φ-pole contributions. The Ξ pole includes Ξ(1320), Ξ(1535), Ξ(1690)(Jp=1/2-), and Ξ(1820)(Jp=3/2-). We calculate the Dalitz plot density of (d2σ/dMK+K-dMK-Λ at 4.2 GeV/c) and the total cross sections for the K-p→K+K-Λ reaction near the threshold. The calculation results are in good agreement with previously acquired experimental data. Using the parameters from the fit, we present the total and differential cross sections for the two-body K-p→K+Ξ(1690)- reaction near the threshold. In our calculation, a strong enhancement at backward K+ angles is predicted because of the dominant u-channel contribution. We also demonstrate that the Dalitz plot analysis for pK-=1.915-2.065 GeV/c enables us to access direct information regarding Ξ(1690)- production, which can be tested by future K- beam experiments. The possible spin-parity states of Ξ(1690)- are briefly discussed as well.
| Original language | English |
|---|---|
| Article number | 114012 |
| Journal | Physical Review D |
| Volume | 98 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2018 Dec 1 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Ξ (1690)- production in the K-p →k+K- Λ reaction process near threshold. / Ahn, Jung Keun; Nam, Seung Il.
In: Physical Review D, Vol. 98, No. 11, 114012, 01.12.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ξ (1690)- production in the K-p →k+K- Λ reaction process near threshold
AU - Ahn, Jung Keun
AU - Nam, Seung Il
PY - 2018/12/1
Y1 - 2018/12/1
N2 - We investigate Ξ(1690)- production from the K-p→K+K-Λ reaction within the effective Lagrangian approach at the tree-level Born approximation. We consider the s- and u-channel Σ/Λ ground states and resonances for the Ξ-pole contributions, in addition to the s-channel Λ, u-channel nucleon pole, and t-channel K- exchange for the φ-pole contributions. The Ξ pole includes Ξ(1320), Ξ(1535), Ξ(1690)(Jp=1/2-), and Ξ(1820)(Jp=3/2-). We calculate the Dalitz plot density of (d2σ/dMK+K-dMK-Λ at 4.2 GeV/c) and the total cross sections for the K-p→K+K-Λ reaction near the threshold. The calculation results are in good agreement with previously acquired experimental data. Using the parameters from the fit, we present the total and differential cross sections for the two-body K-p→K+Ξ(1690)- reaction near the threshold. In our calculation, a strong enhancement at backward K+ angles is predicted because of the dominant u-channel contribution. We also demonstrate that the Dalitz plot analysis for pK-=1.915-2.065 GeV/c enables us to access direct information regarding Ξ(1690)- production, which can be tested by future K- beam experiments. The possible spin-parity states of Ξ(1690)- are briefly discussed as well.
AB - We investigate Ξ(1690)- production from the K-p→K+K-Λ reaction within the effective Lagrangian approach at the tree-level Born approximation. We consider the s- and u-channel Σ/Λ ground states and resonances for the Ξ-pole contributions, in addition to the s-channel Λ, u-channel nucleon pole, and t-channel K- exchange for the φ-pole contributions. The Ξ pole includes Ξ(1320), Ξ(1535), Ξ(1690)(Jp=1/2-), and Ξ(1820)(Jp=3/2-). We calculate the Dalitz plot density of (d2σ/dMK+K-dMK-Λ at 4.2 GeV/c) and the total cross sections for the K-p→K+K-Λ reaction near the threshold. The calculation results are in good agreement with previously acquired experimental data. Using the parameters from the fit, we present the total and differential cross sections for the two-body K-p→K+Ξ(1690)- reaction near the threshold. In our calculation, a strong enhancement at backward K+ angles is predicted because of the dominant u-channel contribution. We also demonstrate that the Dalitz plot analysis for pK-=1.915-2.065 GeV/c enables us to access direct information regarding Ξ(1690)- production, which can be tested by future K- beam experiments. The possible spin-parity states of Ξ(1690)- are briefly discussed as well.
UR - http://www.scopus.com/inward/record.url?scp=85059473592&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevD.98.114012
DO - 10.1103/PhysRevD.98.114012
M3 - Article
VL - 98
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 11
M1 - 114012
ER -