$$D^*\bar{D}^*$$ D ∗ D ¯ ∗ molecule interpretation of $$Z_c(4025)$$ Z c ( 4025 )

Chen, Wei; Steele, T. G.; Du, Meng-Lin; Zhu, Shi-Lin

doi:10.1140/epjc/s10052-014-2773-y

Cited by 91 publications

(116 citation statements)

References 19 publications

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“…The molecular type of interpolating currents were employed to investigate the Z c (3900) and Z c (4020) states in QCD sum rules in Refs [432,433,475,476,430,431,477,478]. The extracted mass agrees with the experimental values within errors.…”

Section: Other Molecular Models On the Z C (3900) And Z C (4025)mentioning

confidence: 80%

“…The method of QCD sum rules was also used to study the two Z b states [428,429,430,431,432,433,434,435]. Using the BB * and B * B * molecule-type interpolating currents with I G J P = 1 + 1 + , their extracted masses were roughly consistent with the masses of the Z b (10610) and Z b (10650) mesons, respectively.…”

Section: Theoretical and Experimental Challengesmentioning

confidence: 91%

“…Besides the diquark configuration, the color octet-octet 8 [qQ] ⊗ 8 [Qq] types of interpolating currents were also considered for the hidden-bottom tetraquark systems in Refs. [432,433] …”

Section: Symmetry Analysismentioning

confidence: 99%

“…Later in Refs. [432,433], the interpolating currents listed in Eq. (125) with the color octet-octet 8 [qc] ⊗ 8 [cq] configuration were also used.…”

Section: 22mentioning

confidence: 99%

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The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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Section: Other Molecular Models On the Z C (3900) And Z C (4025)mentioning

confidence: 80%

Section: Theoretical and Experimental Challengesmentioning

confidence: 91%

Section: Symmetry Analysismentioning

confidence: 99%

“…Later in Refs. [432,433], the interpolating currents listed in Eq. (125) with the color octet-octet 8 [qc] ⊗ 8 [cq] configuration were also used.…”

Section: 22mentioning

confidence: 99%

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The hidden-charm pentaquark and tetraquark states

et al. 2016

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“…We cannot exclude the possibility that the Z c (4025) and Z c (4020) are the same particle with the quantum numbers J PC = 1 −− or 1 +− . There have been several tentative assignments of the Z c (4025) and Z c (4020), such as the re-scattering effects [3,4], molecular states [5][6][7][8][9][10], tetraquark states [11], etc. The Z c (4025) and Z c (4020) are charged charmonium-like states, their quark constituents must be ccud or ccdū irrespective of the diquark-antidiquark type or meson-meson type substructures.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the $$Z_c(4020)$$ Z c ( 4020 ) , $$Z_c(4025)$$ Z c ( 4025 ) , $$Y(4360)$$ Y ( 4360 ) , and $$Y(4660)$$ Y ( 4660 ) as vector tetraquark states with QCD sum rules

2014

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In this article, we distinguish the charge conjugations of the interpolating currents, calculate the contributions of the vacuum condensates up to dimension-10 in the operator product expansion, and we study the masses and pole residues of the J PC = 1 −± hidden charmed tetraquark states with the QCD sum rules. We suggest a formulawith the effective mass M c = 1.8 GeV to estimate the energy scales of the QCD spectral densities of the hidden charmed tetraquark states, which works very well. The numerical results disfavor assigning the Z c (4020), Z c (4025), and Y (4360) as the diquark-antidiquark (with the Dirac-spinor structure C − Cγ μ ) type vector tetraquark states, and they favor assigning the Z c (4020), Z c (4025) as the diquark-antidiquark type 1 +− tetraquark states. While the masses of the tetraquark states with symbolic quark structures ccss and cc(uū + dd)/ √ 2 favor assigning the Y (4660) as the 1 −− diquark-antidiquark type tetraquark state, more experimental data are still needed to distinguish its quark constituents. There are no candidates for the positive charge conjugation vector tetraquark states; the predictions can be confronted with the experimental data in the future at the BESIII, LHCb and Belle-II.

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Multifunctional Pacemaker Lead for Cardiac Energy Harvesting and Pressure Sensing

Dong

Closson

Jin

et al. 2020

Adv Healthcare Materials

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Biomedical self‐sustainable energy generation represents a new frontier of power solution for implantable biomedical devices (IMDs), such as cardiac pacemakers. However, almost all reported cardiac energy harvesting designs have not yet reached the stage of clinical translation. A major bottleneck has been the need of additional surgeries for the placements of these devices. Here, integrated piezoelectric‐based energy harvesting and sensing designs are reported, which can be seamlessly incorporated into existing IMDs for ease of clinical translation. In vitro experiments validate the energy harvesting process by simulating the bending and twisting motion during heart cycle. Clinical translation is demonstrated in four porcine hearts in vivo under various conditions. Energy harvesting strategy utilizes pacemaker leads as a means of reducing the reliance on batteries and demonstrates the charging ability for extending the lifetime of a pacemaker battery by 20%, which provides a promising self‐sustainable energy solution for IMDs. The additional self‐powered blood pressure sensing is discussed, and the reported results demonstrate the potential in alerting arrhythmias by monitoring the right ventricular pressure variations. This combined cardiac energy harvesting and blood pressure sensing strategy provides a multifunctional, transformative while practical power and diagnosis solution for cardiac pacemakers and next generation of IMDs.

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$$D^\bar{D}^$$ D ∗ D ¯ ∗ molecule interpretation of $$Z_c(4025)$$ Z c ( 4025 )

Cited by 91 publications

References 19 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Analysis of the $$Z_c(4020)$$ Z c ( 4020 ) , $$Z_c(4025)$$ Z c ( 4025 ) , $$Y(4360)$$ Y ( 4360 ) , and $$Y(4660)$$ Y ( 4660 ) as vector tetraquark states with QCD sum rules

Multifunctional Pacemaker Lead for Cardiac Energy Harvesting and Pressure Sensing

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