Measurement of the spin rotation parameter Ain the elastic pion-proton scattering at 1.43 GeV/c

Alekseev, I.; Bazhanov, N. A.; Budkovsky, P. E.; Bunyatova, E. I.; Kanavets, V.P.; Ковалев, А. И.; Koroleva, L. I.; Kruglov, S. P.; Morozov, B. V.; Nesterov, V. M.; Novinsky, D. V.; Ryltsov, V.; Shchedrov, V.A.; Sulimov, A. D.; Sumachev, V. V.; Svirida, D. N.; Trautman, V. Yu.; Zhurkin, V.V.

doi:10.1140/epjc/s2005-02454-y

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…The most recent πN elastic and charge-exchange results published after 2000 come from experiments at the Brookhaven National Laboratory (BNL) [92], the Tri-University Meson Facility (TRIUMF) [93], and the Paul Scherrer Institute (PSI) [94,95], for instance. The polarization parameter, P , and the spin-rotation parameter, A, were published recently by the ITEP-PNPI collaboration based on experiments at the Institute for Theoretical and Experimental Physics (ITEP) [96,97]. Earlier recoil polarization data were accumulated in the 1980s at Los Alamos, e.g.…”

Section: Baryon Production Using Hadronic Probes Most Of the Informat...mentioning

confidence: 99%

Progress towards understanding baryon resonances

2013

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Abstract. The composite nature of baryons manifests itself in the existence of a rich spectrum of excited states, in particular in the important mass region 1-2 GeV for the light-flavoured baryons. The properties of these resonances can be identified by systematic investigations using electromagnetic and strong probes, primarily with beams of electrons, photons, and pions. After decades of research, the fundamental degrees of freedom underlying the baryon excitation spectrum are still poorly understood. The search for hitherto undiscovered but predicted resonances continues at many laboratories around the world. Recent results from photo-and electroproduction experiments provide intriguing indications for new states and shed light on the structure of some of the known nucleon excitations. The continuing study of available data sets with consideration of new observables and improved analysis tools have also called into question some of the earlier findings in baryon spectroscopy. Other breakthrough measurements have been performed in the heavy-baryon sector, which has seen a fruitful period in recent years, in particular at the B factories and the Tevatron. First results from the LHC indicate rapid progress in the field of bottom baryons. In this review, we discuss the recent experimental progress and give an overview of theoretical approaches.

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Section: Baryon Production Using Hadronic Probes Most Of the Informat...mentioning

confidence: 99%

Progress towards understanding baryon resonances

2013

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“…But this analysis challenges the existence of many resonances. A strong argument in favor of the Arndt analysis is the correct prediction of spin rotation parameters [14,15,16] and of the backward asymmetry [17] in the elastic pion-proton scattering from ITEP/PNPI while the predictions from [1,2] show clear discrepancies with the data. On the other hand, it is difficult to believe that the consistency between the older analyses is just fortuitous.…”

Section: Introductionmentioning

confidence: 99%

P -wave excited baryons from pion- and photo-induced hyperon production

et al. 2011

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Abstract. We report evidence for N (1710)P11, N (1875)P11, N (1900)P13, ∆(1600)P33, ∆(1910)P31, and ∆(1920)P33, and find indications that N (1900)P13 might have a companion state at 1970 MeV. The controversial ∆(1750)P31 is not seen. The evidence is derived from a study of data on pion-and photo-induced hyperon production, but other data are included as well. Most of the resonances reported here were found in the Karlsruhe-Helsinki (KH84) [1] and the Carnegie-Mellon (CM) [2] analyses but were challenged recently by the Data Analysis Center at GWU [3]. Our analysis is constrained by the energy independent πN scattering amplitudes from either KH84 or GWU. The two πN amplitudes from KH84 or GWU, respectively, lead to slightly different πN branching ratios of contributing resonances but the debated resonances are required in both series of fits.

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Section: Pion-nucleon Scatteringmentioning

confidence: 99%

Light Baryon Spectroscopy

Thiel,

Afzal,

Wunderlich

2022

Preprint

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This review treats the advances in Light Baryon Spectroscopy of the last two decades, which were mainly obtained by measuring meson-production reactions at photon facilities all over the world. We provide a consistent compendium of experimental results, as well as a review of the theoretical methods of amplitude analysis used to analyze the data. The most significant datasets are presented in detail and are listed in combination with a full set of the relevant references. In addition, a brief summary of spin-formalisms, which are ubiquitous in Light Baryon Spectroscopy, as well as a review on complete experiments, are provided. The synthesis of the reviewed knowledge is presented in a full interpretation of the new results on the Light Baryon Spectrum.

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Measurement of the spin rotation parameter Ain the elastic pion-proton scattering at 1.43 GeV/c

Cited by 9 publications

References 5 publications

Progress towards understanding baryon resonances

Progress towards understanding baryon resonances

P -wave excited baryons from pion- and photo-induced hyperon production

Light Baryon Spectroscopy

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