Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-02-20
Phys.Rev.D77:114027,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 10 figures, revised version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.77.114027
We calculate in perturbative QCD the transverse momentum broadening of vector boson production in high energy nuclear collisions. We evaluate the effect of initial-state parton multiple scattering for the production of the Drell-Yan virtual photon and $W/Z$ bosons. We calculate both the initial- and final-state multiple scattering effect for the production of heavy quarkonia and their transverse momentum broadening in both NRQCD and Color Evaporation model of quarkonium formation. We find that J/$\psi$ and $\Upsilon$ broadening in hadron-nucleus collision is close to $2C_A/C_F$ times the corresponding Drell-Yan broadening, which gives a good description of existing Fermilab data. Our calculations are also consistent with RHIC data on J/$\psi$ broadening in relativistic heavy ion collisions. We predict the transverse momentum broadening of vector boson (J/$\psi$, $\Upsilon$, and $W/Z$) production in relativistic heavy ion collisions at the LHC, and discuss the role of the vector boson broadening in diagnosing medium properties.
Kang Zhong-Bo
Qiu Jian-Wei
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