Nuclear
Physics Colloquium
Location: Physics
Building Science Campus Riedberg, Max-von-Laue-Str. 1, room PHYS
2.116
Time: Date: Monday, September 30, 2:00-3:00pm (+10
min. for discussion)
Contact: hees@fias.uni-frankfurt.de
Coherence phenomena
between initial and final state radiation in a dense QCD medium
Mauricio
Martinez-Guerrero (University of Santiago de Compostela)
In
this work we investigate medium modifications to the interference
pattern between initial and final state radiation. We compute single
gluon production off a highly energetic parton that undergoes a hard
scattering and subsequently crosses a dense QCD medium of finite size.
We extend our previous studies obtained at first order in opacity by
providing general results for multiple soft scatterings and their
specific formulation within the harmonic oscillator approximation. We
show that there is a gradual onset of decoherence between the initial
and final state radiation due to multiple scatterings, that opens the
phase space for large angle emissions. By examining the multiplicity of
produced gluons, we observe a potentially large double logarithmic
enhancement for dense media and small opening angles. This result points
to a possible modification of the evolution equations due to a QCD
medium of finite size. We briefly comment on the phenomenological
consequences of this setup in high-energy nuclear collisions.
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Physics Colloquium Homepage