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SUMMARY:Pion Transition Form Factor in Lattice QCD
DTSTART;VALUE=DATE-TIME:20261011T075500Z
DTEND;VALUE=DATE-TIME:20261011T081000Z
DTSTAMP;VALUE=DATE-TIME:20261005T044734Z
UID:indico-contribution-2811@indico.itp.ac.cn
DESCRIPTION:Speakers: 世皓 苏 (中国科学院近代物理研究所)\nW
 e investigate the neutral pion transition form factor $F_{\\pi^0\\gamma^\\
 ast\\gamma^\\ast}(q_1^2\,q_2^2)$ in lattice QCD and confirm that the conne
 cted and disconnected contributions\, in the short-distance regime with a 
 fixed time integration\, have the same sign. We employ the recently propos
 ed blending method\, which supplies an unbiased and cheap estimators for t
 he required all-to-all propagators. \nThe external pion states are treated
  within the distillation framework\, while the electromagnetic currents ar
 e evaluated via blending method.  \nNumerical tests are performed on an $N
 _f=2+1$ lattice ensemble. Our result shows that the contribution of the di
 sconnected part is approximately $1\\%$ of that of the connected part and 
 enables constructive interference of probability amplitudes.\n\nhttps://in
 dico.itp.ac.cn/event/437/contributions/2811/
LOCATION:会议楼2 CXII103
URL:https://indico.itp.ac.cn/event/437/contributions/2811/
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