Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Workman, Ron"'
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
Autor:
Mai, Maxim, Döring, Michael, Granados, Carlos, Haberzettl, Helmut, Hergenrather, Jackson, Meißner, Ulf-G., Rönchen, Deborah, Strakovsky, Igor, Workman, Ron
Pion and eta electroproduction data are jointly analyzed for the first time, up to a center-of-mass energy of 1.6 GeV. The framework is a dynamical coupled-channel model, based on the recent J\"ulich-Bonn-Washington analysis of pion electroproduction
Externí odkaz:
http://arxiv.org/abs/2111.04774
Autor:
Mai, Maxim, Döring, Michael, Granados, Carlos, Haberzettl, Helmut, Meißner, Ulf-G., Rönchen, Deborah, Strakovsky, Igor, Workman, Ron
Publikováno v:
Phys. Rev. C 103, 065204 (2021)
Pion electroproduction off the proton is analyzed in a new framework based on a general parametrization of transition amplitudes, including constraints from gauge invariance and threshold behavior. Data with energies $1.13~{\rm GeV}
Externí odkaz:
http://arxiv.org/abs/2104.07312
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:
Strakovsky, Igor, Briscoe, William, Kudryavtsev, Alexander, Kulikov, Viacheslav, Martemianov, Maxim, Tarasov, Vladimir, Workman, Ron
An overview of the GW SAID and ITEP groups' effort to analyze pion photoproduction on the neutron-target will be given. The disentanglement of the isoscalar and isovector EM couplings of N* and Delta* resonances does require compatible data on both p
Externí odkaz:
http://arxiv.org/abs/1512.01557
Autor:
Workman, Ron, Svarc, Alfred
Resonances are extracted from a number of energy-dependent and single-energy fits to scattering data. The influence of recent, precise EPECUR data is investigated. Results for the single-energy fits are derived using the L+P method of analysis and ar
Externí odkaz:
http://arxiv.org/abs/1510.08278