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SUMMARY:Accessing the Nucleon's Gravitational Structure through Near-Thres
 hold Quarkonium Photoproduction
DTSTART:20260304T130000Z
DTEND:20260304T143000Z
DTSTAMP:20260421T042600Z
UID:indico-event-56@indico.onium.cc
DESCRIPTION:Speakers: Bheemsehan Gurjar (USTC/IIT Kanpur)\n\nAbstract:\nTh
 e energy–momentum tensor (EMT) provides a fundamental and gauge-invarian
 t description of how energy\, momentum\, and internal forces are distribut
 ed within hadrons. Its matrix elements define the gravitational form facto
 rs (GFFs)\, which encode the underlying partonic dynamics by revealing the
  mass decomposition of the nucleon\, the spatial distributions of pressure
  and shear forces\, and the angular momentum carried by quarks and gluons.
  As such\, the study of GFFs has emerged as a central and timely topic in 
 contemporary QCD hadron physics.\nIn this talk\, I will focus on near-thre
 shold photoproduction of heavy quarkonium as a clean and sensitive probe o
 f the nucleon's gravitational structure. In this regime\, the amplitude is
  dominated by gluonic dynamics and is directly related to matrix elements 
 of the QCD EMT\, enabling access to gluonic GFFs. The analysis is formulat
 ed within the framework of the QCD factorization framework for GPDs\, whic
 h provides a systematic separation between short-distance dynamics and the
  non-perturbative nucleon matrix elements.\nFinally\, I will discuss the e
 xperimental prospects for accessing nucleon gravitational form factors thr
 ough near-threshold quarkonium photoproduction at facilities such as Jeffe
 rson Lab and the future Electron–Ion Collider\, and the implications for
  our understanding of the nucleon's internal structure.\n\nAbout the speak
 er:\nBheemsehan Gurjar obtained his PhD in 2024 in the Department of Physi
 cs at the Indian Institute of Technology Kanpur\, India. He subsequently h
 eld a postdoctoral position at IIT Kanpur from 2024 to 2025 under the Fell
 owship for Academic and Research Excellence. He is currently a postdoctora
 l researcher at the University of Science and Technology of China (USTC). 
 He was awarded the Gary McCartor Award by the International Light Cone Adv
 isory Committee at Light Cone 2023\, held in Rio de Janeiro.\n\nZoom link:
  \nhttps://zoom.us/j/97986578839?pwd=xWcw1aT8seXQy3ag7avSbveZ3I2BSb.1\nZo
 om ID: 979 8657 8839PW: 497633\n\nhttps://indico.onium.cc/event/56/
LOCATION:Zoom
URL:https://indico.onium.cc/event/56/
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