Hidden charm pentaquark and Λ(1405) in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msub><mml:mrow><mml:mi>η</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo>

Xie, Ju-Jun; Wu, Liang; Oset, E.

doi:10.1016/j.physletb.2017.12.064

Cited by 16 publications

(10 citation statements)

References 54 publications

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“…This is what was obtained in Ref. [54] with the strict application of heavy quark spin symmetry. The p-dependent terms, however, change this ratio, as we shall see.…”

Section: A λ B Decay In Internal Emissionsupporting

confidence: 86%

Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons

Oset

2018

Eur. Phys. J. C

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We have addressed the study of non-leptonic weak decays of heavy hadrons ( b , c , B and D), with external and internal emission to give two final hadrons, taking into account the spin-angular momentum structure of the mesons and baryons produced. A detailed angular momentum formulation is developed which leads to easy final formulas. By means of them we have made predictions for a large amount of reactions, up to a global factor, common to many of them, that we take from some particular data. Comparing the theoretical predictions with the experimental data, the agreement found is quite good in general and the discrepancies should give valuable information on intrinsic form factors, independent of the spin structure studied here. The formulas obtained are also useful in order to evaluate meson-meson or meson-baryon loops, for instance of B decays, in which one has PP, PV, VP or VV intermediate states, with P for pseudoscalar mesons and V for vector meson and lay the grounds for studies of decays into three final particles.

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“…This is what was obtained in Ref. [54] with the strict application of heavy quark spin symmetry. The p-dependent terms, however, change this ratio, as we shall see.…”

Section: A λ B Decay In Internal Emissionsupporting

confidence: 86%

Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons

Oset

2018

Eur. Phys. J. C

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“…Meanwhile, the possible effect of the TS on the Λð1405Þ production was studied in Refs. [50][51][52]. Now, as found in Refs.…”

Section: Introductionsupporting

confidence: 62%

Anomalous enhancement of the isospin-violating Λ(1405) production by a triangle singularity in Λc→

et al. 2018

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The decay of Λ þ c into π þ π 0 Λð1405Þ with the Λð1405Þ decay into π 0 Σ 0 through a triangle diagram is studied. This process is initiated by Λ þ c → π þKÃ N, and then theK Ã decays intoKπ andKN produce the Λð1405Þ through a triangle loop containingK Ã NK which develops a singularity around 1890 MeV. This process is prohibited by the isospin symmetry, but the decay into this channel is enhanced by the contribution of the triangle diagram, which is sensitive to the mass of the internal particles. We find a narrow peak in the π 0 Σ 0 invariant mass distribution, which originates from the Λð1405Þ amplitude, but is tied to the mass differences between the charged and neutralK or N states. The observation of the unavoidable peak of the triangle singularity in the isospin-violating Λð1405Þ production would provide further support for the hadronic molecular picture of the Λð1405Þ and further information on theKN interaction.

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“…Subsequent experimental findings at LHCb [38] supported this idea showing that this specific decay is dominated by intermediate * resonances and, in particular, they confirm the contribution of the (1405) tail in the K − p invariant mass distribution predicted by the authors of [48]. The success of this mechanism has triggered a lot of activity in the community; the recent study of b → η c K − p(π ) decay [49] is an evidence of it, where the authors show that the final-state interaction is basically mediated by the (1405) and where it is highlighted that this decay is a very clean one, free of any I = 1 contribution, to produce such resonance. Even more recently, the theoretical analysis in [50] provides new insights on π spectra in the region of the (1405) by means of exploring the mesonbaryon final state interaction in the 0 b weak decay into D 0 and a meson-baryon pair.…”

Section: B → J/ K J/ η Decaysmentioning

confidence: 53%

S=−1 meson-baryon interaction and the role of isospin filtering processes

2019

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A study of the meson-baryon interaction in the S = −1 sector is performed, employing a chiral SU(3) Lagrangian up to next-to-leading order (NLO) and implementing unitarization in coupled channels. The model is constrained by a large set of experimental data, paying special attention to processes that are sensitive to the NLO contributions, such as the K − p → K + − , K 0 0 reactions. The consideration of additional cross sections in single isospin channels, K − p → η , η , has been found to provide NLO low-energy constants of rather similar size. The stability of these constants has also been tested by the inclusion of explicit resonant terms. Predictions for new isospin filtering processes, like the I = 1 K 0 L p → K + 0 reaction that could be measured at the proposed secondary K 0 L beam at Jlab, or the weak decay of the b into a J/ and different meson-baryon pairs in I = 0, available at LHCb, are presented. The measurement of such reactions would put valuable constraints on the chiral models describing the S = −1 meson-baryon interaction.

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Hidden charm pentaquark and Λ(1405) in the Λb0→ηcK−

Cited by 16 publications

References 54 publications

Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons

Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons

Anomalous enhancement of the isospin-violating Λ(1405) production by a triangle singularity in Λc→

S=−1 meson-baryon interaction and the role of isospin filtering processes

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