Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Workman, Ron L."'
A unified Chew-Mandelstam description of single-pion photoproduction data, together with pion- and eta-hadroproduction data, has been extended to include measurements carried out over the last decade. We consider photo-decay amplitudes evaluated at t
Externí odkaz:
http://arxiv.org/abs/2309.06631
Autor:
Strakovsky, Igor, Širca, Simon, Briscoe, William J., Deur, Alexandre, Schmidt, Axel, Workman, Ron L.
Phenomenological amplitudes obtained in partial-wave analyses (PWA) of single-pion photoproduction are used to evaluate the contribution of this process to the Gerasimov-Drell-Hearn (GDH), Baldin and Gell-Mann-Goldberger-Thirring (GGT) sum rules, by
Externí odkaz:
http://arxiv.org/abs/2201.06495
Autor:
Briscoe, William J., Kudryavtsev, Alexander E., Strakovsky, Igor I., Tarasov, Vladimir E., Workman, Ron L.
A review of our works providing a theoretical description of incoherent pion photoproduction on the deuteron is presented. The existing $\gamma d\to\pi NN$ data are analysed, especially those obtained more recently by the CLAS Collaboration at JLab,
Externí odkaz:
http://arxiv.org/abs/2112.08150
Publikováno v:
Phys. Rev. C 95, 025205 (2017)
Modern experimental facilities, such as CBELSA, ELPH, JLab, MAMI and SPring-8 have provided a tremendous volume of data, often with wide energy and angular coverage, and with increasing precision. For reactions with two hadrons in the final state, th
Externí odkaz:
http://arxiv.org/abs/1701.00124
Publikováno v:
Phys. Rev. C 94, 065203 (2016)
Energy-dependent and single-energy fits to the existing nucleon-nucleon database have been updated to incorporate recent measurements. The fits cover a region from threshold to 3 GeV, in the laboratory kinetic energy, for proton-proton scattering, wi
Externí odkaz:
http://arxiv.org/abs/1609.01741
Autor:
Svarc, Alfred, Hadzimehmedovic, Mirza, Osmanovic, Hedim, Stahov, Jugoslav, Tiator, Lothar, Workman, Ron L.
A method to extract resonance pole information from single-channel partial-wave amplitudes based on a Laurent (Mittag-Leffler) expansion and conformal mapping techniques has recently been developed. This method has been applied to a number of reactio
Externí odkaz:
http://arxiv.org/abs/1512.07403
Autor:
Burkert, Volker D., Kamano, Hiroyuki, Klempt, Eberhard, Ronchen, Deborah, Sarantsev, Andrey V., Sato, Toru, Svarc, Alfred, Tiator, Lothar, Workman, Ron L.
We analyze the current status of three P-wave baryon states $N(1710){1/ 2}^+$, $N(1900){3/2}^+$, and $\Delta(1600){3/2}^+$ as given in the Review of Particles Physics (RPP). Since the evidence for a particle's existence is linked to its RPP "star" ra
Externí odkaz:
http://arxiv.org/abs/1412.0241
Publikováno v:
Phys. Rev. C91, 015207 (2015)
The pole structure of the current GW/SAID partial-wave analysis of elastic $\pi N$ scattering and $\eta N$ production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using two differen
Externí odkaz:
http://arxiv.org/abs/1405.6474
Autor:
Švarc, Alfred, Hadžimehmedović, Mirza, Osmanović, Hedim, Stahov, Jugoslav, Tiator, Lothar, Workman, Ron L.
Publikováno v:
Phys. Rev. C 89, 065208 (2014)
We have applied a new approach to determine the pole positions and residues from pion photoproduction multipoles. The method is based on a Laurent expansion of the partial wave T-matrices, with a Pietarinen series representing the regular part of ene
Externí odkaz:
http://arxiv.org/abs/1404.1544
Autor:
Svarc, Alfred, Hadzimehmedovic, Mirza, Osmanovic, Hedim, Stahov, Jugoslav, Tiator, Lothar, Workman, Ron L.
Publikováno v:
Phys. Rev. C 88, 035206 (2013)
We present a new approach to quantifying pole parameters of single-channel processes based on a Laurent expansion of partial-wave T-matrices in the vicinity of the real axis. Instead of using the conventional power-series description of the non-singu
Externí odkaz:
http://arxiv.org/abs/1307.4613