<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>π</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>η</mml:mi><mml:mi>p</mml:mi></mml:mrow></mml:math>deexcitation channels of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>N</mml:mi><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and Δ baryon

Tatischeff, B.; Yonnet, Jean‐Paul; Boivin, M.; Comets, M. P.; Courtat, P.; Gacougnolle, R.; Bornec, Y. Le; Loireleux, E.; MacCormick, M.; Reide, F.

doi:10.1103/physrevc.72.034004

Cited by 6 publications

(6 citation statements)

References 47 publications

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“…An other example of narrow exotic baryonic structures concerns the careful study of the N * mass in the range 1475≤ N * ≤1675 MeV. The same two reactions, already called: pp→pπ + X and pp→ppX were studied and the two final state channels: pπ 0 and pη were selected by software cuts applied to the missing mass of the first reaction [25]. The conclusion of the work was that the broad PDG baryonic resonances in this mass range N(1520)D 13 , N(1535)S 11 , ∆(1600)P 33 , N(1650)S 11 , and N(1675)D 15 are collective states built from several narrow and weakly excited resonances, having each a (much) smaller width than the one reported by PDG.…”

Section: Application To Narrow Baryonsmentioning

confidence: 99%

What do fractals learn us concerning the masses of fundamental particles, of hadrons, and of nuclei? Concerning also disintegration life-times?

Tatischeff¹

2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

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The hadron spectroscopy is studied through the use of fractals and discrete scale invariance (DSI) implying log-periodic corrections to continuous scaling. The masses of mesons and baryons, reported by the Particle Data Group (PDG), agree with (DSI), as well as the masses of exotic narrow mesons, baryons, and dibaryons. Two distributions are systematically studied: first the log of the masses versus the log of their rank, and also the successive mass ratios. Each fitted parameter of the second distributions, as a function of the hadronic masses, displays the same shape for all PDG hadronic families and species. The same parameters allow good fits for the narrow exotic mesons, baryons and dibaryons. When the successive mass ratios between different baryon families are constant, this property is not observed between different meson families. Such observation is studied within the double mass ratios eliminating the quark masses, but the difference between baryons and mesons is not understood. The fractal properties and discrete scale invariance model are also used to study nuclei yrast masses as well as excited nuclei level masses of some nuclei. Here also the good agreement between data and fractal property, allows to make some predictions for still unobserved nuclei masses. Fractal properties are also compared to several nuclei data such as : -atomic masses in several columns of the Mendeleev periodic table of elements, -masses of series following β + or β − disintegrations, -one and two nucleon separation energies, -half-lives of some isotopes, -the four radioactive family periods.Finally, it is shown that the lepton, hadron, and boson masses can be presented in the same frame. This is also partially true for the coupling constants.

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Section: Application To Narrow Baryonsmentioning

confidence: 99%

What do fractals learn us concerning the masses of fundamental particles, of hadrons, and of nuclei? Concerning also disintegration life-times?

Tatischeff¹

2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

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“…2. The masses of narrow exotic mesons, baryons, and dibaryons, observed before, were attributed to quark clusters [3,4,5,13]. For a review, see also [17].…”

Section: Discussionmentioning

confidence: 94%

Search for low-mass exotic mesonic structures: II. Attempts to understand the results

Tatischeff

Tomasi–Gustafsson

2008

Phys. Part. Nuclei Lett.

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Our previous paper, part I of the same study, shows the different experimental spectra used to conclude on the genuine existence of narrow, weakly excited mesonic structures, having masses below and a little above the pion (M=139.56 MeV) mass. This work [1] was instigated by the observation, in the Σ + disintegration: Σ + →pP 0 , P 0 → µ − µ + [2], of a narrow range of dimuon masses. The authors conclude on the existence of a neutral intermediate state P0, with a mass M=214.3 MeV ± 0.5 MeV. We present here some attempts to understand the possible nature of the structures observed in part I.

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“…On the other hand, several other species do not exhibit such large ratio values at first "r" points, and are therefore correctly fitted over the total distribution. These species are: charmed strange mesons, charmed, and charmed-strange baryons, and also the exotic narrow mesons [36][37][38][39][40], exotic narrow baryons [41][42][43][44] and exotic narrow dibaryons [45][46][47][48] which were also analysed within fractal properties, but not illustrated here.…”

Section: Discussionmentioning

confidence: 99%

Fractal properties applied to hadron spectroscopy

Tatischeff¹

2011

Preprint

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A contribution is presented to the study of hadron spectroscopy through the use of fractals and discrete scale invariance implying log-periodic corrections to continuous scaling. The masses of mesons and baryons, reported by the Particle Data Group (PDG), are properly fitted with help of the equation derived from the discrete-scale invariance (DSI) model. The same property is observed for the mass ratios between different particle species. This is also the case for total widths of several hadronic species.Each fitted parameter, as a function of the hadronic masses, displays the same distribution for all hadronic species. Several masses of still unobserved mesons and baryons are tentatively predicted.

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πNandηpdeexcitation channels of theN*and Δ baryon

Cited by 6 publications

References 47 publications

What do fractals learn us concerning the masses of fundamental particles, of hadrons, and of nuclei? Concerning also disintegration life-times?

What do fractals learn us concerning the masses of fundamental particles, of hadrons, and of nuclei? Concerning also disintegration life-times?

Search for low-mass exotic mesonic structures: II. Attempts to understand the results

Fractal properties applied to hadron spectroscopy

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