1,724,209 research outputs found
Production of P-cs (4459) from Xi(b) Decay
Inspired by the P-cs (4459) reported by the LHCb collaboration recently, we investigate the P-cs (4459) production from Xi(b) decay in a molecular scenario using an effective Lagrangian approach. With different J(P) assignments to P-cs (4459), the magnitude of branching fractions of Xi(b) -> P-cs (4459) K is estimated, which is of the order of 10(-4). Together with the decay properties of P-cs (4459), the present estimations could be further testified by precise measurements and contribute to a better understanding of the molecular interpretations and the exploration of J(P) quantum numbers of P-cs (4459).Supported by the National Natural Science Foundation of China (Grant No. 11775050), and the Scientific Research Foundation of
Graduate School of Southeast University (Grant No. YBPY2028)
Block Card 4459 Pennfield Road
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Evidence of the P_ccbars(4459)0 in Upsilon(1S, 2S) inclusive decays at Belle
International audienceUsing data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy collider, we search for [udsccbar] pentaquark states decaying to Jpsi Lambda. Using the first observations of Upsilon(1S, 2S) inclusive decays to Jpsi Lambda, we find evidence of the P_ccbars(4459)0 state with a significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the Pccbars(4459)0 to be (4471.7 +- 4.8 +- 0.6) MeV/c2 and (21.9 +- 13.1 +- 2.7) MeV, respectively. The branching fractions for P_ccbars(4459)0 production are measured to be B[Upsilon(1S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 + anything] = (3.5 +- 2.0 +- 0.2)*10-6 and B[Upsilin(2S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 +anything] = (2.9 +- 1.7 +- 0.4)*10-6. The inclusive branching fractions of Upsilon(1S, 2S) -> Jpsi Lambda/Lambdabar are measured to be B[Upsilin(1S) -> Jpsi Lambda/Lambdabar + anything] = (36.9 +- 5.3 +- 2.4)*10-6 and B[Upsilon(2S) -> Jpsi Lambda/Lambdabar + anything] = (22.3 +- 5.7 +- 3.1)*10-6. We measure the visible cross section + anything) = (90 +- 14 +- 6) fb for the continuum production at GeV. In all cases, the first uncertainties are statistical and the second are systematic
Evidence of the P_ccbars(4459)0 in Upsilon(1S, 2S) inclusive decays at Belle
International audienceUsing data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy collider, we search for [udsccbar] pentaquark states decaying to Jpsi Lambda. Using the first observations of Upsilon(1S, 2S) inclusive decays to Jpsi Lambda, we find evidence of the P_ccbars(4459)0 state with a significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the Pccbars(4459)0 to be (4471.7 +- 4.8 +- 0.6) MeV/c2 and (21.9 +- 13.1 +- 2.7) MeV, respectively. The branching fractions for P_ccbars(4459)0 production are measured to be B[Upsilon(1S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 + anything] = (3.5 +- 2.0 +- 0.2)*10-6 and B[Upsilin(2S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 +anything] = (2.9 +- 1.7 +- 0.4)*10-6. The inclusive branching fractions of Upsilon(1S, 2S) -> Jpsi Lambda/Lambdabar are measured to be B[Upsilin(1S) -> Jpsi Lambda/Lambdabar + anything] = (36.9 +- 5.3 +- 2.4)*10-6 and B[Upsilon(2S) -> Jpsi Lambda/Lambdabar + anything] = (22.3 +- 5.7 +- 3.1)*10-6. We measure the visible cross section + anything) = (90 +- 14 +- 6) fb for the continuum production at GeV. In all cases, the first uncertainties are statistical and the second are systematic
The pentaquark from a combined effective field theory and phenomenological perspective
International audienceThe observation of the by the LHCb collaboration adds a new member to the set of known hidden-charm pentaquarks, which includes the , and . The is expected to have the light-quark content of a baryon (, ), but its spin is unknown. Its closeness to the threshold – in the isospin-symmetric limit – suggests the molecular hypothesis as a plausible explanation for the . While in the absence of coupled-channel dynamics heavy-quark spin symmetry predicts the two spin-states of the to be degenerate, power counting arguments indicate that the coupling with the nearby and channels might be a leading order effect. This generates a hyperfine splitting in which the pentaquark will be lighter than the configuration, which we estimate to be of the order of . We also point out an accidental symmetry between the and potentials. Finally, we argue that the spectroscopy and the decays of the might suggest a marginal preference for over
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4459.pdf (Publisher’s version ) (Open Access
Linked collectors and determiners for: TUR Bryophyte collections of the Turku University (TUR).
Natural history specimen data linked to collectors and determiners held within, "TUR Bryophyte collections of the Turku University (TUR)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/e9484ac9-4459-47e0-ba62-9c88b8ef031a">https://bionomia.net/dataset/e9484ac9-4459-47e0-ba62-9c88b8ef031a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e9484ac9-4459-47e0-ba62-9c88b8ef031a">https://gbif.org/dataset/e9484ac9-4459-47e0-ba62-9c88b8ef031a</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Description of a new species of the genus Ptychozoon (Squamata: Gekkonidae), representing a new national record of this genus from southern Yunnan Province, China.
Natural history specimen data linked to collectors and determiners held within, "Description of a new species of the genus Ptychozoon (Squamata: Gekkonidae), representing a new national record of this genus from southern Yunnan Province, China". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/9943d5c6-76c7-4459-a06d-37ff57abb34c">https://bionomia.net/dataset/9943d5c6-76c7-4459-a06d-37ff57abb34c</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/9943d5c6-76c7-4459-a06d-37ff57abb34c">https://gbif.org/dataset/9943d5c6-76c7-4459-a06d-37ff57abb34c</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: The New York Botanical Garden Herbarium (NY).
Natural history specimen data linked to collectors and determiners held within, "The New York Botanical Garden Herbarium (NY)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/d415c253-4d61-4459-9d25-4015b9084fb0">https://bionomia.net/dataset/d415c253-4d61-4459-9d25-4015b9084fb0</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/d415c253-4d61-4459-9d25-4015b9084fb0">https://gbif.org/dataset/d415c253-4d61-4459-9d25-4015b9084fb0</a>. Formatted as a Frictionless Data package
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