Strange hadron production at SIS energies: an update from HADES

Lorenz, M.; Adamczewski-Musch, J.; Arnold, O.; Atomssa, E. T.; Behnke, C.; Berger-Chen, J. C.; Biernat, J.; Blanco, A.; Blume, C.; Böhmer, M.; Bordalo, P.; Chernenko, S.; Deveaux, C.; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.; Fonte, P.; Franco, C.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gill, K.; Golubeva, M.; Guber, F.; Gumberidze, M.; Harabasz, S.; Hennino, T.; Hlaváč, S.; Höhne, C.; Holzmann, R.; Ierusalimov, A.; Ivashkin, A.; Jurković, M.; Kämpfer, B.; Karavicheva, T.; Kardan, B.; Köenig, I.; Koenig, W.; Kolb, B. W.; Korcyl, G.; Kornakov, G.; Kötte, R.; Krása, A.; Krebs, Η.; Kuc, G.; Куглер, А.; Kunz, T.; Kurepin, A.; Kurilkin, A.; Kurilkin, P. K.; Ladygin, V. P.; Lalik, R.; Lapidus, K.; Lebedev, A.; Lopes, L.; Mahmoud, T.; Maier, L.; Mangiarotti, A.; Markert, J.; Metag, V.; Michel, J.; Müntz, C.; Münzer, Robert Helmut; Naumann, L.; Pałka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Petousis, V.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Rehnisch, L.; Reshetin, A.; Rost, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Scheib, T.; Schmidt-Sommerfeld, K. R.; Schuldes, H.; Sellheim, P.; Siebenson, J.; Silva, L.; Sobolev, Yu. G.; Spataro, S.; Ströbele, H.; Stroth, J.; Strzempek, P.; Sturm, C.; Svoboda, O.; Tarantola, A.; Teilab, K.; Tlustý, P.; Traxler, M.; Tsertos, H.; Vasiliev, T.; Wagner, V.; Wendisch, C.; Wirth, J.; Wüstenfeld, J.; Zanevsky, Y.; Zumbruch, P.

doi:10.1088/1742-6596/668/1/012022

Cited by 4 publications

(4 citation statements)

References 41 publications

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“…Finally, we note that the axial form factors for the transition of a ∆ to a nucleon are addressed in [49] at the one-loop level. In principle, this calculation involves the low-energy constant c E of (29). In lack of corresponding high-quality data, it is difficult to pin down c E .…”

Section: Determination Of Some Low-energy Constantsmentioning

confidence: 99%

“…At NLO all the radiative decays B(J = 3/2) → B ′ (J = 1/2) γ are given by just one interaction term ∼ c M according to the corresponding Lagrangian (29) and the replacement (17). Thus one can determine c M by comparing to the measured decay widths for ∆ → N γ, Σ * + → Σ + γ and Σ * 0 → Λ γ [8].…”

Section: Radiative Transitionsmentioning

confidence: 99%

“…In particular, the Facility for Antiproton and Ion Research (FAIR) will provide excellent opportunities to produce and measure strange hadrons and their radiative decay products (photons and electron-positron pairs). For the upcoming phase 0 of FAIR it is planned that the two collaborations HADES (High Acceptance DiElectron Spectrometer) [29] andPANDA (Antiproton ANnihilation at DArmstadt) [30] will jointly carry out such analyses. 1 So far the rather elementary radiative decay processes of a decuplet baryon to an octet baryon and a real photon have only been observed for some of the decuplet members [8].…”

Section: Introductionmentioning

confidence: 99%

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The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order

Holmberg

Leupold

2018

Eur. Phys. J. A

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A complete and minimal relativistic Lagrangian is constructed at next-to-leading order for SU(3) chiral perturbation theory in the presence of baryon octet and baryon decuplet states. The Lagrangian has 13 terms for the pure decuplet sector, 6 terms for the transition sector from baryon octet to decuplet and (as already known from the literature) 16 terms for the pure octet sector. The minimal field content of 25 of these terms is meson-baryon four-point interactions. 3 terms give rise to the mass splitting for baryon octet and decuplet states, respectively. 2 terms give rise to overall mass shifts. 4 terms provide anomalous magnetic moments and a decuplet-to-octet magnetic transition moment. 1 term leads to an axial vector transition moment. It is shown that meson-baryon three-point coupling constants come in at leading order whereas no additional one appears in the minimal Lagrangian at next-to-leading order. Those low-energy constants that give rise to mass splitting and magnetic moments, respectively, are determined. Predictions are provided for radiative decays of decuplet to octet baryons.

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Section: Determination Of Some Low-energy Constantsmentioning

confidence: 99%

Section: Radiative Transitionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order

Holmberg

Leupold

2018

Eur. Phys. J. A

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“…However, some 2 Since there is some confusion in the literature we define these phrases explicitly; time-like/space-like means: modulus of energy larger/smaller than modulus of three-momentum. 3 P. Salabura, private communication; see also [9] and references therein. discussion about the experimental feasibility is appropriate: The transition form factors are functions of the invariant mass of the dilepton, i.e.…”

Section: Introductionmentioning

confidence: 99%

The electromagnetic Sigma-to-Lambda hyperon transition form factors at low energies

2017

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Using dispersion theory the low-energy electromagnetic form factors for the transition of a Sigma to a Lambda hyperon are related to the pion vector form factor. The additionally required input, i.e. the two-pion-Sigma-Lambda amplitudes are determined from relativistic next-to-leading-order (NLO) baryon chiral perturbation theory including the baryons from the octet and optionally from the decuplet. Pion rescattering is again taken into account by dispersion theory. It turns out that the inclusion of decuplet baryons is not an option but a necessity to obtain reasonable results. The electric transition form factor remains very small in the whole low-energy region. The magnetic transition form factor depends strongly on one not very well determined low-energy constant of the NLO Lagrangian. One obtains reasonable predictive power if this low-energy constant is determined from a measurement of the magnetic transition radius. Such a measurement can be performed at the future Facility for Antiproton and Ion Research (FAIR).

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Heavy-Ion Collisions: Status of Chemical Equilibrium

Cleymans

2016

New Horizons in Fundamental Physics

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Strange hadron production at SIS energies: an update from HADES

Cited by 4 publications

References 41 publications

The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order

The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order

The electromagnetic Sigma-to-Lambda hyperon transition form factors at low energies

Heavy-Ion Collisions: Status of Chemical Equilibrium

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