Partial Wave Analysis of the Reaction $p(3.5GeV)+p\to p{K}^{+}\Lambda$ to Search for the "$pp{K}^{-}$" Bound State

Abstract

Employing the Bonn-Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of the reaction $p(3.5GeV)+p\to p{K}^{+}\Lambda$. This reaction might contain information about the kaonic cluster "$pp{K}^{-}$" via its decay into $p\Lambda$. Due to interference effects in our coherent description of the data, a hypothetical $\overline{K}NN$ (or, specifically "$pp{K}^{-}$") cluster signal must not necessarily show up as a pronounced feature (e.g. a peak) in an invariant mass spectra like $p\Lambda$. Our PWA analysis includes a variety of resonant and non-resonant intermediate states and delivers a good description of our data (various angular distributions and two-hadron invariant mass spectra) without a contribution of a $\overline{K}NN$ cluster. At a confidence level of CL${}_s$=95\% such a cluster can not contribute more than 2-12\% to the total cross section with a $p{K}^{+}\Lambda$ final state, which translates into a production cross-section between 0.7 $\mu b$ and 4.2 $\mu b$, respectively. The range of the upper limit depends on the assumed cluster mass, width and production process.

7 Pages, 5 Figures

References in corpus (15)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• Strange dibaryon resonance in the anti-KNN--piYN system
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• Indication of a deeply bound compact K-pp state formed in the pp -> p Lambda K+ reaction at 2.85 GeV
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• $\bar{K}$ nuclear bound states in a dynamical model
• Energy dependence of barKN interactions and resonance pole of strange dibaryons
• Variational calculations for K-few-nucleon systems
• Partial decay widths of baryons in the spin-momentum operator expansion method
• Faddeev calculations of the $\bar{K}NN$ system with chirally-motivated $\bar{K}N$ interaction. II. The $K^{-}pp$ quasi-bound state
• Massive Neutron Stars with Antikaon Condensates in a Density Dependent Hadron Field Theory
• Partial decay widths of baryons in the spin-momentum operator expansion method
• Search for the deeply bound $K^{-}pp$ state from the semi-inclusive forward-neutron spectrum in the in-flight $K^{-}$ reaction on helium-3

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• Momentum dependence of the imaginary part of the $\omega$- and ${\eta }^{\prime }$-nucleus optical potential
• Search for the deeply bound $K^{-}pp$ state from the semi-inclusive forward-neutron spectrum in the in-flight $K^{-}$ reaction on helium-3
• Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV
• Quadruply charmed baryons as heavy quark symmetry partners of the $D_{s0}^{\ast }(2317)$
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• MESON2016 -- Concluding Remarks
• Quasi-bound state in the $\bar{K}NNN$ system
• Recent results and future prospects of kaonic nuclei at J-PARC
• Ground-state properties of light kaonic nuclei signaling symmetry energy at high densities
• Evidence for a $\bar{K}NN$ quasi-bound state in the $\gamma d\to K^0\Lambda p$ reaction
• Search for Deeply Bound Kaonic Nuclear States with AMADEUS