Dihadron fragmentation: in vacuum and in matter

Abstract

Two particle correlations within a single jet produced in deeply inelastic scattering (DIS) off a large nucleus as well as in heavy-ion collisions are explored. This is performed within the framework of the medium modified dihadron fragmentation functions. The modification occurs due to gluon bremsstrahlung induced by multiple scattering. The modified fragmentation functions for dihadrons are found to follow closely that of single hadrons leading to a weak nuclear suppression of their ratios as measured by HERMES in DIS experiments. Meanwhile, a moderate medium enhancement of the near-side correlation of two high $p_T$ hadrons is found in central heavy-ion collisions, partially due to trigger bias caused by the competition between parton energy loss and the initial Cronin effect.

4 pages, 2 figures, LATEX, talk given at Hard Probes 2004

References in corpus (2)

• Measurement of Jet Modification at RHIC
• The dihadron fragmentation function and its evolution

Cited by in corpus (5)

• Double hadron leptoproduction in the nuclear medium
• Nuclear Attenuation of high energy two-hadron system in the string model
• Autocorrelation of Hadrons in Jets Produced in Heavy-Ion Collisions
• A study of the double hadron neutrinoproduction on nuclei
• Nuclear attenuation of high energy multi-hadron systems in the string model