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SUMMARY:Matching Singlet Axial-Vector and Topological Currents from (S)MOM
  to MS to Four Loops
DTSTART;VALUE=DATE-TIME:20261010T013000Z
DTEND;VALUE=DATE-TIME:20261010T020000Z
DTSTAMP;VALUE=DATE-TIME:20261005T002213Z
UID:indico-contribution-639-2762@indico.itp.ac.cn
DESCRIPTION:Speakers: 龙 陈 (Shandong University)\nThe singlet axial-vec
 tor and topological current operators play central roles in determining th
 e quark and gluon spin contributions to the proton spin. As a consequence 
 of the Adler–Bell–Jackiw anomaly\, the axial-vector current $J_A^\\mu$
  acquires a non-trivial renormalization starting at two loops in perturbat
 ion theory\, which is closely related to the renormalization of the topolo
 gical current. The determination of the renormalization constant for $J_A^
 \\mu$ at high orders is complicated by the notorious difficulty of treatin
 g $\\gamma_5$ in dimensional regularization. Employing an newly proposed e
 fficient variant of Larin's renormalization condition for $J_A^\\mu$ in di
 mensionally regularized QCD\, we compute the finite matching coefficients 
 from (S)MOM to $\\overline{\\mathrm{MS}}$ schemes up to unprecedented (3)4
  loops. These results provide essential theoretical input for accurately c
 onverting (S)MOM-renormalized currents computed in lattice QCD to their $\
 \overline{\\mathrm{MS}}$-renormalized counterparts.\n\nhttps://indico.itp.
 ac.cn/event/437/contributions/2762/
LOCATION:会议楼2 CXII401
URL:https://indico.itp.ac.cn/event/437/contributions/2762/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Progress and Challenges in Phenomenological Determination of PDFs
DTSTART;VALUE=DATE-TIME:20261010T010000Z
DTEND;VALUE=DATE-TIME:20261010T013000Z
DTSTAMP;VALUE=DATE-TIME:20261005T002213Z
UID:indico-contribution-639-2840@indico.itp.ac.cn
DESCRIPTION:Speakers: 可平 谢 (TDLI/SJTU)\nWe present new parton distri
 bution functions (PDFs) at next-to-next-to-leading order (NNLO) from the C
 TEQ-TEA global analysis of quantum chromodynamics. The CT25 PDFs incorpora
 te new data from the LHC  and employ a more flexible parametrization\, ena
 bling improved fits to the various quark flavor combinations. The CT25 PDF
 s include a central set and Hessian error sets. Instead of the combined gl
 obal + dynamic tolerance used in CT18\,  the main CT25 PDF set uses only a
  dynamic tolerance. We also present CT25 PDFs at leading order (LO) and ne
 xt-to-leading order (NLO)\, along with (N)NLO sets for different $\\alpha_
 s$ values\, and PDF4LHC-like sets. Phenomenological implications are discu
 ssed\, with emphasis on Higgs production at the 13 TeV LHC.\n\nhttps://ind
 ico.itp.ac.cn/event/437/contributions/2840/
LOCATION:会议楼2 CXII401
URL:https://indico.itp.ac.cn/event/437/contributions/2840/
END:VEVENT
BEGIN:VEVENT
SUMMARY:LaMET最新进展
DTSTART;VALUE=DATE-TIME:20261010T003000Z
DTEND;VALUE=DATE-TIME:20261010T010000Z
DTSTAMP;VALUE=DATE-TIME:20261005T002213Z
UID:indico-contribution-639-2881@indico.itp.ac.cn
DESCRIPTION:Speakers: 向东 季 ()\nhttps://indico.itp.ac.cn/event/437/co
 ntributions/2881/
LOCATION:会议楼2 CXII401
URL:https://indico.itp.ac.cn/event/437/contributions/2881/
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