based on our analysis of the contributions from the connected and disconnected contraction diagrams to the pion-kaon scattering amplitude,we provide the first determination of the only free low-energy constant at O(p^...based on our analysis of the contributions from the connected and disconnected contraction diagrams to the pion-kaon scattering amplitude,we provide the first determination of the only free low-energy constant at O(p^(4)),known as L_(0)^(r),in SU(4|1)Partially-Quenched Chiral Perturbation theory using the data from the Extended Twisted Mass collaboration,L_(0)^(r)(μ=M_(ρ))=0.77(20)(25)(7)(7)(2)·10^(-3).The theory uncertainties originate from the unphysical scattering length,the physical low-energy constants,the higher-order chiral corrections,the(lattice)meson masses and the pion decay constant,respectively.展开更多
基金supported in part by the DFG(Projektnummer 196253076—TRR 110)the NSFC(Grant No.11621131001)through the funds provided to the Sino-German CRC 110‘Symmetries and the Emergence of Structure in QCD’+3 种基金by the Alexander von Humboldt Foundation through the Humboldt Research Fellowshipby the Chinese Academy of Sciences(CAS)through a President’s International Fellowship Initiative(PIFI)(Grant No.2018DM0034)by the Volkswagen Stiftung(Grant No.93562)by the EU Horizon 2020 research and innovation programme,STRONG-2020 project under grant agreement No.824093。
文摘based on our analysis of the contributions from the connected and disconnected contraction diagrams to the pion-kaon scattering amplitude,we provide the first determination of the only free low-energy constant at O(p^(4)),known as L_(0)^(r),in SU(4|1)Partially-Quenched Chiral Perturbation theory using the data from the Extended Twisted Mass collaboration,L_(0)^(r)(μ=M_(ρ))=0.77(20)(25)(7)(7)(2)·10^(-3).The theory uncertainties originate from the unphysical scattering length,the physical low-energy constants,the higher-order chiral corrections,the(lattice)meson masses and the pion decay constant,respectively.
