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SUMMARY:Spin effects in heavy quarkonia production
DTSTART;VALUE=DATE-TIME:20010227T113000Z
DTEND;VALUE=DATE-TIME:20010227T123000Z
DTSTAMP;VALUE=DATE-TIME:20261012T152543Z
UID:indico-event-1217@indico.ific.uv.es
DESCRIPTION:Various initial and final state spin asymmetries in lepto- and
  hadroproduction of heavy quarkonia are examined. The single spin asymmetr
 ies in leproproduction are absent at Born level and are very sensitive to 
 the details of production mechanism. The double spin asymmetries receive s
 ignificant enhancement from the colour octet contribution. The $k_\\perp$ 
 factorization approach at small $x$ provides the complementary contributio
 n to the standard collinear factorization and leads to a very good descrip
 tion of the open beauty production. It naturally explains the large cross-
 section for the production of $\\Chi_1$ state and absence of large transve
 rse polarization of direct $J/\\Psi$. The discovery potential for the meas
 urement of the polarized gluon density is discussed.\n\nhttps://indico.ifi
 c.uv.es/event/1217/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1217/
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