Partial widths for the decays η:(1295) →γγ and η:(1440) →γγ

Anisovich, A. V.; Anisovich, V.V.; Nikonov, V. A.; Montanet, L.

doi:10.1007/s100500050342

Cited by 29 publications

(68 citation statements)

References 2 publications

(10 reference statements)

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“…f 0 (1200 − 1600): The broad state is the descendant of the primary glueball. The analysis of hadronic decays of this resonance confirmed its glueball nature: the glueball descendant has the quark-antiquark component (qq) glueball = (uū + dd + √ λss)/ √ 2 + λ [21], which is defined by the probability to create new qq-pairs by the gluon field uū : dd : ss = 1 : 1 : λ, the suppression parameter for the production of strange quarks being in the interval λ ≃ 0.5 − 0.8 [22,23]. In terms of mixing angle for the nn and ss components, this means that the glueball descendant must have ϕ glueball ≃ 27…”

Section: Introductionmentioning

confidence: 80%

“…In Section 3.8, we present more detailed narration of the study of analytical structure of the amplitude at the region s ∼ 0 − 4m 2 π , with the restoration of the left-hand singularities obeying equations (20) and (21); this topic is related to the light σ-meson problem.…”

Section: Partial Amplitude For the 00mentioning

confidence: 99%

“…As a result, comparatively narrow states f 0 (1300), f 0 (1500), f 0 (1750) have had considerable admixtures of the glueball component, while the broad state got a large qq-component. The quark-antiquark component in the glueball should be close to the flavour singlet, namely [21]:…”

Section: +50mentioning

confidence: 99%

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Systematics of quark–antiquark states and scalar exotic mesons

Anisovich¹

2004

Phys.-Usp.

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The analysis of the experimental data of Crystal Barrel Collaboration on the pp annihilation in flight with the production of mesons in the final state resulted in a discovery of a large number of mesons over the region 1900-2400 MeV, thus allowing us to systematize quark-antiquark states in the (n, M 2 ) and (J, M 2 ) planes, where n and J are radial quantum number and spin of the meson with the mass M . The data point to meson trajectories in these planes being approximately linear, with a universal slope. The sector of scalar mesons is discussed in more detail, where, on the basis of the recent K-matrix analysis, the nonet classification of quark-antiquark states was performed: in the region below 2000 MeV, two scalar nonets are fixed, that is, the basic one and the nonet of the first radial excitation. In the scalar sector, there are two states with the isospin

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Section: Introductionmentioning

confidence: 80%

Section: Partial Amplitude For the 00mentioning

confidence: 99%

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Systematics of quark–antiquark states and scalar exotic mesons

Anisovich¹

2004

Phys.-Usp.

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“…Analyses of this type are pursued by the GWU/INS (SAID) approach in the Chew-Mandelstam formulation [77,78], by the Bonn-Gatchina group in the N/D formulation [147,148], and by the Kent State [149] and the Zagreb [150] groups in the Carnegie-Mellon-Berkeley (CMB) formulation. The Gießen group uses a K-matrix formalism [151,152], while the MAID approach employs a unitary isobar approach in which the final-state interaction is taken from the SAID approach [79].…”

Section: Amplitude Analysismentioning

confidence: 99%

Analysis Tools for Next-Generation Hadron Spectroscopy Experiments

Battaglieri¹,

Briscoe²,

Celentano³

et al. 2015

Acta Phys. Pol. B

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The series of workshops on New Partial-Wave Analysis Tools for Next-Generation Hadron Spectroscopy Experiments was initiated with the ATHOS 2012 meeting, which took place in Camogli, Italy, June 20-22, 2012. It was followed by ATHOS 2013 in Kloster Seeon near Munich, Germany, May 21-24, 2013. The third, ATHOS3, meeting is planned for April 13-17, 2015 at The George Washington University Virginia Science and Technology Campus, USA. The workshops focus on the development of amplitude analysis tools for meson and baryon spectroscopy, and complement other programs in hadron spectroscopy organized in the recent past including the INT-JLab Workshop on Hadron Spectroscopy in Seattle in 2009, the International Workshop on Amplitude Analysis in Hadron Spectroscopy at the ECT*-Trento in 2011, the School on Amplitude Analysis in Modern Physics in Bad Honnef in 2011, the Jefferson Lab Advanced Study Institute Summer School in 2012, and the School on Concepts of Modern Amplitude Analysis Techniques in Flecken-Zechlin near Berlin in September 2013. The aim of this document is to summarize the discussions that took place at the ATHOS 2012 and ATHOS 2013 meetings. We do not attempt a comprehensive review of the field of amplitude analysis, but offer a collection of thoughts that we hope may lay the ground for such a document.Comment: 28 pages, 11 figures, proceedings of the ATHOS 2012 and ATHOS 2013 meeting

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“…A comparison of the multipoles E 0+ , E 2− and M 2− of the dominantly contributing resonances reveal the impact of the new data [26]. Fig.…”

Section: Measurement Of Double Polarization Observablesmentioning

confidence: 99%