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SUMMARY:On the inclusive production of $J/\\psi$ at the EIC in a TMD frame
 work
DTSTART:20251126T100000Z
DTEND:20251126T120000Z
DTSTAMP:20260811T054000Z
UID:indico-event-12350@indico.ijclab.in2p3.fr
DESCRIPTION:Speakers: Luca Maxia (LPTHE\, Sorbonne Université)\n\nIn cont
 rast with the quark counterparts\, gluon distributions that include transv
 erse momentum and spin effects are still poorly known. It is therefore imp
 ortant to identify observables sensitive to gluons. A proper framework to 
 investigate these distributions is then the transverse momentum dependent 
 (TMD) factorization. As a potential source of data to probe gluon TMDs\, 
 Higgs production is a valuable playground\, but it is mostly sensitive to 
 the high energy region. Thus\, complementary information could in principl
 e be achieved by investigating lower energy states\, including quarkonia (
 and especially $J/\\psi$). In this regard\, the electron-ion collider is e
 xpected to have a crucial role in the relatively near future. However\, t
 o single out information about the initial state\, it is first necessary t
 o understand the behavior of the final state. This\, in turn\, requires th
 e adoption of the proper TMD factorization which includes quarkonium forma
 tion. Recent developments have demonstrated that a novel transverse moment
 um dependent (TMD) quantity must be introduced: the TMD shape function (TM
 D-ShF). The function can be seen as a generalization of the long-distance 
 matrix elements (LDME) that characterize the nonrelativistic QCD (NRQCD) a
 pproach. In this talk\, I aim to illustrate the impact of the TMD-ShF on 
 $J/\\psi$ yields in SIDIS at the EIC. I will therefore first introduce thi
 s TMD quantity. I will then combine the TMD expression with the collinear 
 one to obtain predictions valid at all transverse momenta. Finally\, I wil
 l present numerical results based on this framework to quantify the expect
 ed impact of the TMD-ShF on $J/\\psi$ cross section and asymmetries.\n\nht
 tps://indico.ijclab.in2p3.fr/event/12350/
LOCATION:100/2-A201 - Salle A201 (IJCLab)
URL:https://indico.ijclab.in2p3.fr/event/12350/
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