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SUMMARY:Complete Leading-twist Baryon Light-cone Distribution Amplitudes f
 rom LQCD
DTSTART;VALUE=DATE-TIME:20261010T072500Z
DTEND;VALUE=DATE-TIME:20261010T074000Z
DTSTAMP;VALUE=DATE-TIME:20261005T044558Z
UID:indico-contribution-2813@indico.itp.ac.cn
DESCRIPTION:Speakers: 沐华 张 (Shanghai Jiao Tong University)\nBaryon l
 ight-cone distribution amplitudes (LCDAs) encode the longitudinal momentum
  distributions of valence quarks and provide important nonperturbative inp
 uts for hard exclusive processes involving baryons. In this talk\, I will 
 present the first lattice determination of the three leading-twist $\\Lamb
 da$-baryon LCDAs\, $V$\, $A$\, and $T$\, as full two-dimensional functions
  of the valence-quark momentum fractions.\n\nThis work establishes a syste
 matic large-momentum effective theory (LaMET) framework for determining le
 ading-twist baryon LCDAs from lattice QCD\, covering the complete procedur
 e from equal-time three-quark correlators to the momentum-fraction depende
 nce of physical light-cone amplitudes. Key ingredients include a two-dimen
 sional hybrid renormalization prescription in coordinate space\, an HQET-m
 otivated large-$\\lambda$ extrapolation strategy for controlling the long-
 distance behavior of Euclidean correlators\, one-loop perturbative matchin
 g to the light-cone amplitudes in the $\\overline{\\rm MS}$ scheme\, and c
 ontrolled extrapolations to the continuum\, physical-pion-mass\, and infin
 ite-momentum limits.\n\nAs a phenomenological illustration\, replacing the
  asymptotic LCDA with the lattice-determined distributions leads to an $\\
 mathcal{O}(10\\%)$ shift in the $\\Lambda$ electromagnetic form factor at 
 perturbative scales. These results provide the first complete multidimensi
 onal\, $x$-dependent baryon LCDAs from first principles and establish a fr
 amework for future lattice studies of baryon light-cone structure.\n\nhttp
 s://indico.itp.ac.cn/event/437/contributions/2813/
LOCATION:会议楼2 CXII103
URL:https://indico.itp.ac.cn/event/437/contributions/2813/
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