S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region

doi:10.1016/j.physletb.2018.12.035

Title: S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region

Abstract

Here, we perform a simultaneous analysis of s- and p-waves of the S = –1 meson-baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and both well-known I( J^P) = 0(1/2 ^-) s-wave states as well as a new I( J^P) = 0(1/2 ⁺) state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an I = 1 p-wave resonance the new state just accounts for the absence of the decuplet Σ(1385)3/2 ⁺ in the model.

Authors:

Sadasivan, Daniel ^[1]; Mai, Maxim ^[1];

^[2]

The George Washington Univ., Washington, D.C. (United States)
The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Publication Date:: 2018-12-19

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

OSTI Identifier:: 1488348

Alternate Identifier(s):: OSTI ID: 1489231

Report Number(s):: JLAB-THY-18-2699; DOE/OR/23177-4578; arXiv:1805.04534
Journal ID: ISSN 0370-2693; PII: S0370269318309626

Grant/Contract Number:: AC05-06OR23177; MA 7156/1; 1415459; PHY-1452055; SC0016582

Resource Type:: Published Article

Journal Name:: Physics Letters. Section B

Additional Journal Information:: Journal Volume: 789; Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Sadasivan, Daniel, Mai, Maxim, and Döring, Michael. S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.physletb.2018.12.035.

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                    Sadasivan, Daniel, Mai, Maxim, & Döring, Michael. S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region.  United States.  doi:10.1016/j.physletb.2018.12.035.

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                    Sadasivan, Daniel, Mai, Maxim, and Döring, Michael. Wed .  
        "S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region".  United States.  doi:10.1016/j.physletb.2018.12.035.

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@article{osti_1488348,

  title        = {S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region},

  author       = {Sadasivan, Daniel and Mai, Maxim and Döring, Michael},

  abstractNote = {Here, we perform a simultaneous analysis of s- and p-waves of the S = –1 meson-baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and both well-known I(JP) = 0(1/2-) s-wave states as well as a new I(JP) = 0(1/2+) state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an I = 1 p-wave resonance the new state just accounts for the absence of the decuplet Σ(1385)3/2+ in the model.},

  doi          = {10.1016/j.physletb.2018.12.035},

  journal      = {Physics Letters. Section B},

  number       = C,

  volume       = 789,

  place        = {United States},

  year         = {2018},

  month        = {12}

}

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DOI: 10.1016/j.physletb.2018.12.035

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Figures / Tables:

Table 1: Left: Parameters of the best fit. The values in parentheses behind the χ²dof show the contributions from data sets (a, b, c), respectively. The generalized variance is given by the determinant of the covariance matrix, |Σ|, and is related to the volume of the error ellipse as describedmore »

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