TY - JOUR
T1 - ππ P-wave resonant scattering from lattice QCD
AU - Paul, Srijit
AU - Alexandrou, Constantia
AU - Leskovec, Luka
AU - Meinel, Stefan
AU - Negele, John W.
AU - Petschlies, Marcus
AU - Pochinsky, Andrew
AU - Rendon Suzuki, Jesus Gumaro
AU - Syritsyn, Sergey
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.
PY - 2018/3/26
Y1 - 2018/3/26
N2 - We present a high-statistics analysis of the ρ resonance in ππ scattering, using 2 + 1 flavors of clover fermions at a pion mass of approximately 320 MeV and a lattice size of approximately 3:6 fm. The computation of the two-point functions are carried out using combinations of forward, sequential, and stochastic propagators. For the extraction of the ρ-resonance parameters, we compare different fit methods and demonstrate their consistency. For the ππ scattering phase shift, we consider different Breit-Wigner parametrizations and also investigate possible nonresonant contributions. We find that the minimal Breit-Wigner model is suffcient to describe our data, and obtain amρ = 0:4609(16)stat(14)sys and gρππ = 5:69(13)stat(16)sys. In our comparison with other lattice QCD results, we consider the dimensionless ratios amρ/amN and amπ/amN to avoid scale setting ambiguities.
AB - We present a high-statistics analysis of the ρ resonance in ππ scattering, using 2 + 1 flavors of clover fermions at a pion mass of approximately 320 MeV and a lattice size of approximately 3:6 fm. The computation of the two-point functions are carried out using combinations of forward, sequential, and stochastic propagators. For the extraction of the ρ-resonance parameters, we compare different fit methods and demonstrate their consistency. For the ππ scattering phase shift, we consider different Breit-Wigner parametrizations and also investigate possible nonresonant contributions. We find that the minimal Breit-Wigner model is suffcient to describe our data, and obtain amρ = 0:4609(16)stat(14)sys and gρππ = 5:69(13)stat(16)sys. In our comparison with other lattice QCD results, we consider the dimensionless ratios amρ/amN and amπ/amN to avoid scale setting ambiguities.
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U2 - 10.1051/epjconf/201817505022
DO - 10.1051/epjconf/201817505022
M3 - Conference article
AN - SCOPUS:85045148152
SN - 2101-6275
VL - 175
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
M1 - 05022
T2 - 35th International Symposium on Lattice Field Theory, Lattice 2017
Y2 - 18 June 2017 through 24 June 2017
ER -