Nuclear Effects in Hadron Production at HERMES
- INFN-Laboratori Nazionali di Frascati. Via E. Fermi 40, I 00044 Frascati (Italy)
The influence of the nuclear medium on the lepto-production of hadrons was studied in semi-inclusive deep-inelastic scattering off several nuclear targets. In particular, at the HERMES experiment at DESY, the differential multiplicity for nuclei relative to that of deuterium has been measured for the first time for various identified hadrons ({pi}{sup +}, {pi}{sup -}, {pi}{sup 0}, K{sup +}, K{sup -}, p and anti-p) as a function of the virtual photon energy {nu}, the fraction z of this energy transferred to the hadron, and the hadron transverse momentum squared p{sub t}{sup 2}. The distribution of the hadron transverse momentum is broadened towards high p{sub t}{sup 2} in the nuclear medium, in a manner resembling the Cronin effect previously observed in collisions of heavy ions and protons with nuclei.
- OSTI ID:
- 21049380
- Journal Information:
- AIP Conference Proceedings, Vol. 964, Issue 1; Conference: International workshop on quantum chromodynamics: Theory and experiment, Martina Franca (Italy), 16-20 Jun 2007; Other Information: DOI: 10.1063/1.2823847; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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