resonance in coupled , scattering from lattice QCD
Abstract
We present the first lattice QCD calculation of coupled $$\pi\omega$$ and $$\pi\phi$$ scattering, incorporating coupled $$S$$ and $$D$$-wave $$\pi\omega$$ in $J^P=1^+$. Finite-volume spectra in three volumes are determined via a variational analysis of matrices of two-point correlation functions, computed using large bases of operators resembling single-meson, two-meson and three-meson structures, with the light-quark mass corresponding to a pion mass of $$m_\pi \approx 391$$ MeV. Utilising the relationship between the discrete spectrum of finite-volume energies and infinite-volume scattering amplitudes, we find a narrow axial-vector resonance ($$J^{PC}=1^{+-}$$), the analogue of the $$b_1$$ meson, with mass $$m_{R}\approx1380$$ MeV and width $$\Gamma_{R}\approx 91$$ MeV. The resonance is found to couple dominantly to $$S$$-wave $$\pi\omega$$, with a much-suppressed coupling to $$D$$-wave $$\pi\omega$$, and a negligible coupling to $$\pi\phi$$ consistent with the `OZI rule'. No resonant behavior is observed in $$\pi\phi$$, indicating the absence of a putative low-mass $$Z_s$$ analogue of the $$Z_c$$ claimed in $$\pi J/\psi$$. In order to minimally present the contents of a unitary three-channel scattering matrix, we introduce an $$n$$-channel generalization of the traditional two-channel Stapp parameterization.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Org.:
- Hadron Spectrum Collaboration
- OSTI Identifier:
- 1562569
- Alternate Identifier(s):
- OSTI ID: 1567053
- Report Number(s):
- JLAB-THY-19-2910; DOE/OR/; 23177-4664; arXiv:1904.04136; DAMTP-2019-12
Journal ID: ISSN 2470-0010; PRVDAQ; 054506
- Grant/Contract Number:
- SC0018416; AC05-06OR23177; AC05-00OR22725; AC02-05CH11231; ST/P000681/1; ST/P002307/1; ST/R002452/1; ST/R00689X/1; UF160419
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 5; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Woss, Antoni J., Thomas, Christopher E., Dudek, Jozef J., Edwards, Robert G., Wilson, David J., and Hadron Spectrum Collaboration. b 1 resonance in coupled π ω , π ϕ scattering from lattice QCD. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.054506.
Woss, Antoni J., Thomas, Christopher E., Dudek, Jozef J., Edwards, Robert G., Wilson, David J., & Hadron Spectrum Collaboration. b 1 resonance in coupled π ω , π ϕ scattering from lattice QCD. United States. https://doi.org/10.1103/PhysRevD.100.054506
Woss, Antoni J., Thomas, Christopher E., Dudek, Jozef J., Edwards, Robert G., Wilson, David J., and Hadron Spectrum Collaboration. Wed .
"b 1 resonance in coupled π ω , π ϕ scattering from lattice QCD". United States. https://doi.org/10.1103/PhysRevD.100.054506.
@article{osti_1562569,
title = {b 1 resonance in coupled π ω , π ϕ scattering from lattice QCD},
author = {Woss, Antoni J. and Thomas, Christopher E. and Dudek, Jozef J. and Edwards, Robert G. and Wilson, David J. and Hadron Spectrum Collaboration},
abstractNote = {We present the first lattice QCD calculation of coupled $\pi\omega$ and $\pi\phi$ scattering, incorporating coupled $S$ and $D$-wave $\pi\omega$ in $J^P=1^+$. Finite-volume spectra in three volumes are determined via a variational analysis of matrices of two-point correlation functions, computed using large bases of operators resembling single-meson, two-meson and three-meson structures, with the light-quark mass corresponding to a pion mass of $m_\pi \approx 391$ MeV. Utilising the relationship between the discrete spectrum of finite-volume energies and infinite-volume scattering amplitudes, we find a narrow axial-vector resonance ($J^{PC}=1^{+-}$), the analogue of the $b_1$ meson, with mass $m_{R}\approx1380$ MeV and width $\Gamma_{R}\approx 91$ MeV. The resonance is found to couple dominantly to $S$-wave $\pi\omega$, with a much-suppressed coupling to $D$-wave $\pi\omega$, and a negligible coupling to $\pi\phi$ consistent with the `OZI rule'. No resonant behavior is observed in $\pi\phi$, indicating the absence of a putative low-mass $Z_s$ analogue of the $Z_c$ claimed in $\pi J/\psi$. In order to minimally present the contents of a unitary three-channel scattering matrix, we introduce an $n$-channel generalization of the traditional two-channel Stapp parameterization.},
doi = {10.1103/PhysRevD.100.054506},
journal = {Physical Review D},
number = 5,
volume = 100,
place = {United States},
year = {Wed Sep 18 00:00:00 EDT 2019},
month = {Wed Sep 18 00:00:00 EDT 2019}
}
https://doi.org/10.1103/PhysRevD.100.054506
Web of Science
Figures / Tables:
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Figures / Tables found in this record: