Inclusive and exclusive inelastic processes in QCD

For a long time, it Was belie­ved that fun­da­men­tal con­sti­tu­ents of atoms were elec­trons and nuc­le­ons until expe­ri­ments con­duc­ted in the 1960 s at Stand­ford Linear Acce­le­ra­tor Cen­ter (SLAC) pro­ved the exi­stence of inter­nal dyna­mics in the nuc­le­ons. With QCD as the fun­da­men­tal the­ory for hadrons, we can describe hadro­nic struc­ture via cor­re­la­tions between some degrees of fre­edom that we call quarks and glu­ons, col­lec­ti­vely par­tons. The non-ele­men­tary nature of hadrons makes these cor­re­la­tors per­tur­ba­ti­vely unso­lva­ble so we can only measure or model them. In this semi­nar, I review and com­pare 2 of these cor­re­la­tors/distri­bu­tions, namely PDF and GPD, and discuss how to study phe­no­me­no­logy of a par­ti­cu­lar exc­lu­sive ine­la­stic pro­cess (double deeply vir­tual Comp­ton scat­te­ring) in order to extract infor­ma­tion on the par­to­nic distri­bu­tions bey­ond leading-order accu­racy.