arXiv subjects

M. Shrestha

Publications and source records attributed to M. Shrestha.

22 records · Page 2Linked to original sources

arXiv2013

Partial-wave analysis of $\bar K N$ scattering reactions

We investigate the two-body reactions $\bar K N\rightarrow \bar K N$, $\bar K N\rightarrow πΛ$, and $\bar K N\rightarrow πΣ$ via single-energy partial-wave analyses in the c.m.\ energy range 1480 to 2100 MeV. The partial-wave amplitudes for these reactions thus extracted were constrained by a multichannel energy-dependent model satisfying unitarity of the partial-wave $S$-matrix. We obtain excellent predictions of differential cross sections, polarizations, polarized cross sections, and cross sections for these reactions from a global energy-dependent solution.

hep-ph↗

arXiv2013

Multichannel parametrization of $\bar K N$ scattering amplitudes and extraction of resonance parameters

We present results of a new multichannel partial-wave analysis for $\bar K N$ scattering in the c.m.\ energy range 1480 to 2100 MeV. Resonance parameters were extracted by fitting partial-wave amplitudes from all considered channels using a multichannel parametrization that is consistent with $S$-matrix unitarity. The resonance parameters are generally in good agreement with predictions of the Koniuk-Isgur quark model.

hep-ph↗

arXiv2012

Multichannel parametrization of πN scattering amplitudes and extraction of resonance parameters

We present results of a new multichannel partial-wave analysis for πN scattering in the c.m. energy range 1080 to 2100 MeV. This work explicitly includes ηN and K Λchannels and the single pion photoproduction channel. Resonance parameters were extracted by fitting partial-wave amplitudes from all considered channels using a multichannel parametrization that is consistent with S-matrix unitarity. The resonance parameters so obtained are compared to predictions of quark models.

hep-ph↗

arXiv2012

Partial-wave analysis of π-p {\to} ηn and π-p {\to} K0Λ reactions

We investigate the hadronic reactions πN {\to} ηN and πN {\to} KΛ via single-energy partial-wave analyses in the c.m. energy range 1080 to 2100 MeV. Our results for the KΛ channel are consistent with prior works; however, for the ηN channel our results differ significantly from previous energy-dependent partial-wave analyses that violate the S-matrix unitarity. We present the first (new) results of ηN and KΛ partial-wave amplitudes constrained by a unitary energy-dependent model. We obtain excellent predictions of integrated cross sections for the two reactions from a global energy-dependent solution. Our results imply that the region just above S11 (1535) has a major contribution from P11 (1710) for π-p {\to} ηn, whereas the large peak near 1700 MeV in π-p {\to} K0Λ is dominated by contributions from both S11 (1650) and P11 (1710).

hep-ph↗