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SUMMARY:[NT/RIKEN seminar] Gauge-invariant TMD factorization for Drell-Yan
hadronic tensor at small x
DTSTART;VALUE=DATE-TIME:20210129T150000Z
DTEND;VALUE=DATE-TIME:20210129T170000Z
DTSTAMP;VALUE=DATE-TIME:20220126T164346Z
UID:indico-event-10646@indico.bnl.gov
DESCRIPTION:The Drell-Yan hadronic tensor for electromagnetic (EM) curre
nt is calculated in the Sudakov region $s\\gg Q^2\\gg q_\\perp^2$ with
${1\\over Q^2}$ accuracy\, first at the tree level and then with the doubl
e-log accuracy. It is demonstrated that in the leading order in $N_c$ t
he higher-twist quark-quark-gluon TMDs reduce to leading-twist TMDs due t
o QCD equation of motion. The resulting tensor for unpolarized hadrons is
EM gauge-invariant and depends on two leading-twist TMDs: $f_1$ responsi
ble for total DY cross section\, and Boer-Mulders function $h_1^\\perp$.
The order-of-magnitude estimates of angular distributions for DY proces
s seem to agree with LHC results at corresponding kinematics.\n\n \n\nhtt
ps://indico.bnl.gov/event/10646/
LOCATION:https://bluejeans.com/456036356
URL:https://indico.bnl.gov/event/10646/
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