22-27 September 2016
East Lake International Conference Center
Asia/Chongqing timezone
<a href="http://hp2016.ccnu.edu.cn">http://hp2016.ccnu.edu.cn</a>

Heavy quarkonium spectrum and diffractive production in a light-front Hamiltonian approach

25 Sep 2016, 11:20
Jing-Zhou Hall (East Lake International Conference Center)

Jing-Zhou Hall

East Lake International Conference Center

Donghu Road 142, Wuchang District, Wuhan, Hubei, China


Guangyao Chen (Iowa State University)


We study exclusive heavy flavor vector meson production in diffractive deep inelastic scattering and ultra-peripheral heavy-ion collisions within the dipole picture. We obtain the mass spectrum and light-front wavefunctions of heavy quarkonium from the basis light-front quantization approach, using the one-gluon exchange interaction plus a confining potential inspired by light-front holography. We apply these light-front wavefunctions to exclusive charmonium and bottomonium production. The resulting cross sections are in reasonable agreement with electron-proton collision data at HERA and ultra-peripheral nucleus collision measurements at RHIC and LHC. The heavy quarkonium cross-section has model dependence on dipole model. We observe that the cross-section ratio of excited states to the ground state has a weaker dependence than cross-section itself. We suggest that measurements of excited states of heavy quarkonium production in future electron-ion collision experiments will impose rigourous constraints on heavy quarkonium light-front wavefunctions, thus improving our understanding of meson structure, which eventually will help us develop a precise description of the gluon distribution function at small-$x$ regime. This work was supported in part by the Department of Energy under Grant Nos. DE-FG02-87ER40371 and DESC0008485 (SciDAC- 3/NUCLEI).

Presentation type Oral

Primary author

Guangyao Chen (Iowa State University)

Presentation Materials