<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>Σ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math>at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>p</mml:mi><mml:mrow><mml:msup><mml:mi

Prakhov, S.; Nefkens, B. M. K.; Allgower, C.; Bekrenev, V.; Briscoe, W. J.; Clajus, M.; Comfort, J. R.; Craig, K.; Grosnick, D.; Isenhower, D.; Knecht, N. S.; Koetke, D. D.; Koulbardis, A.; Kozlenko, N.; Kruglov, S. P.; Lolos, G. J.; Lopatin, I.; Manley, D. M.; Manweiler, R.; Marušić, A.; McDonald, S.; Olmsted, J.; Papandreou, Z.; Peaslee, D. C.; Phaisangittisakul, N.; Price, J. W.; Ramirez, A. F.; Sadler, M. E.; Shafi, A.; Spinka, H.; Stanislaus, T. D. S.; Starostin, A.; Staudenmaier, H. M.; Supek, I.; Tippens, W. B.

doi:10.1103/physrevc.70.034605

Cited by 97 publications

(45 citation statements)

References 16 publications

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“…(21) to study how the form factors obtained at the resonance position are seen on the real energy axis. These effective form factors on the real axis will provide the quantities which can be compared with the experimental observations, in contrast to the form factors obtained in the complex energy plane.…”

Section: B Effective Form Factors On the Real Energy Axismentioning

confidence: 99%

Internal structure of the resonantΛ(1405) state in chiral dynamics

2011

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The internal structure of the resonant (1405) state is investigated based on meson-baryon coupled-channels chiral dynamics by evaluating density distributions obtained from the form factors of the (1405) state. The form factors are defined as an extension of the ordinary stable particles and are directly evaluated from the currentcoupled meson-baryon scattering amplitude, paying attention to the charge conservation of the probe interactions. For the resonant (1405) state we calculate the density distributions in two ways. One is on the pole position of the (1405) in the complex energy plane, which evaluates the resonant (1405) structure without contamination from nonresonant backgrounds, and another is on the real energy axis around the (1405) resonance energy, which may be achieved in experiments. Using several probe interactions and channel decomposition, we separate the various contributions to the internal structure of the (1405). As a result, we find that the resonant (1405) state is composed of widely spreadK around N , which gives dominant component inside the (1405), with escaping π component. Furthermore, we considerKN bound state without decay channels, with which we can observe the internal structure of the bound state within real numbers. We also study the dependence of the form factors on the binding energy and meson mass. This verifies that the form factor defined through the current-coupled scattering amplitude serves as a natural generalization of the form factor for the resonance state. The relation between the interaction strength and the meson mass shows that the physical kaon mass appears to be within the suitable range to form a molecular bound state with the nucleon through the chiral SU(3) interaction.

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Section: B Effective Form Factors On the Real Energy Axismentioning

confidence: 99%

Internal structure of the resonantΛ(1405) state in chiral dynamics

2011

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“…This is because different reactions give different weights to each of the poles. While originally most reactions gave energies around 1400 MeV, the origin of the nominal mass of the resonance, the was measured [52] and a peak was observed around 1420 MeV, narrower than the one observed in [49, 50], which was interpreted within the chiral unitary approach in [57]. Another illustrative experiment was the one of [58] where a clear peak was observed around 1420 MeV in the reaction, which was also interpreted theoretically in [59] along the same lines; see also Refs.…”

Section: Introductionmentioning

confidence: 99%

Predictions for the $${\varvec{\Lambda }_b \rightarrow J/\psi ~ \Lambda (1405)}$$ Λ b → J / ψ Λ ( 1405 ) decay

Roca

Mai²,

Oset

et al. 2015

Eur. Phys. J. C

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We calculate the shape of the and invariant mass distributions in the and decays that are dominated by the resonance. The weak interaction part is the same for both processes and the hadronization into the different meson–baryon channels in the final state is given by symmetry arguments. The most important feature is the implementation of the meson–baryon final-state interaction using two chiral unitary models from different theoretical groups. Both approaches give a good description of antikaon–nucleon scattering data, the complex energy shift in kaonic hydrogen and the line shapes of in photoproduction, based on the two-pole scenario for the . We find that this reaction reflects more the higher mass pole and we make predictions of the line shapes and relative strength of the meson–baryon distributions in the final state.

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“…The analysis of these data also allowed a prediction of the cross section for the K − p → π 0 0 reaction in good agreement with data, without using the data of that reaction in the fit. While in all known reactions the two poles do not revert to two peaks, but only to peaks of different shapes [2,[30][31][32][33][34][35][36][37][38][39], the new data on electroproduction [40], with two visible peaks around 1368 and 1423 MeV, have been an unexpected surprise. The lower pole is also broader than the higher one, as extracted from the photoproduction data in [1].…”

Section: Introductionmentioning

confidence: 99%

Isospin 0 and 1 resonances fromπΣphotoproduction data

2013

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Recently we presented a successful strategy to extract the position of the two (1405) poles from experimental photoproduction data on the γp → K + π 0 0 reaction at Jefferson Lab. Following a similar strategy, we extend the previous method to incorporate also the isospin 1 component which allows us to consider in addition the experimental data on γp → K + π ± ∓ . The idea is based on considering a production mechanism as model independent as possible and implementing the final state interaction of the final meson-baryon pair based on small modifications of the unitary chiral perturbation theory amplitudes. Good fits to the data are obtained with this procedure, by means of which we can also predict the cross sections for the K − p →KN, π , and π reactions for the different charge channels. Besides the two poles found for the (1405) resonance, we discuss the possible existence of an isospin 1 resonance in the vicinity of theKN threshold.

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K−p→π0π0Σ0atp

Cited by 97 publications

References 16 publications

Internal structure of the resonantΛ(1405) state in chiral dynamics

Internal structure of the resonantΛ(1405) state in chiral dynamics

Predictions for the $${\varvec{\Lambda }_b \rightarrow J/\psi ~ \Lambda (1405)}$$ Λ b → J / ψ Λ ( 1405 ) decay

Isospin 0 and 1 resonances fromπΣphotoproduction data

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