Quark fragmentation to $π^{\pm}$, $π^{0}$, $K^{\pm}$, $p$ and $\bar{p}$ in the nuclear environment

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dc.creatorHERMES collaboration
dc.creatorAirapetian, A.
dc.date2003-07-11
dc.date.accessioned2026-07-07T13:03:49Z
dc.date.available2026-07-07T13:03:49Z
dc.descriptionThe influence of the nuclear medium on lepto-production of hadrons was studied in the HERMES experiment at DESY in semi-inclusive deep-inelastic scattering of 27.6 GeV positrons off deuterium, nitrogen and krypton targets. The differential multiplicity for krypton relative to that of deuterium has been measured for the first time for various identified hadrons ($π^+$, $π^-$, $π^0$, $K^+$, $K^-$, $p$ and $\bar{p}$) as a function of the virtual photon energy $ν$, the fraction $z$ of this energy transferred to the hadron, and the hadron transverse momentum squared $p_t^2$. The multiplicity ratio is strongly reduced in the nuclear medium at low $ν$ and high $z$, with significant differences among the various hadrons. The distribution of the hadron transverse momentum is broadened towards high $p_t^2$ in the nuclear medium, in a manner resembling the Cronin effect previously observed in collisions of heavy ions and protons with nuclei.
dc.description8 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/hep-ex/0307023
dc.identifierhttp://arxiv.org/abs/hep-ex/0307023
dc.identifierPhys.Lett.B577:37-46,2003
dc.identifierdoi:10.1016/j.physletb.2003.10.026
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226942
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleQuark fragmentation to $π^{\pm}$, $π^{0}$, $K^{\pm}$, $p$ and $\bar{p}$ in the nuclear environment
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