Forward Hadron Production in Muon Deep Inelastic Scattering at 490-GeV from Deuterium and Xenon

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/1372875· OSTI ID:1372875

Salvarani, Alexandro F. ^[1]

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1. Univ. of California, San Diego, CA (United States)

This thesis presents measurements of the energy fraction $$z$$ and transverse momentum of the final state charged hadrons in muon deep inelastic scattering at 490 Ge V from deuterium and xenon targets. The measurements were made as part of Experiment 665 at Fermilab. The ratio of the forward hadron multiplicity between the two nuclei shows that at large transfer energy, $$\nu$$ > 100 GeV, the nucleus behaves remarkably transparent to the fragmentation process. This is an indication that at high energy hadrons are formed outside the nucleus. At lower energies, $$\nu$$ < 100 GeV, a depletion of leading hadrons in xenon respect to deuterium is observed plus a broadening of the transverse momentum of the hadrons from the heavy nuclei. This is what would be expected if hadrons have undergone inelastic rescattering in nuclear matter. These results support the idea that hadrons need a finite time to be formed, and due to Lorentz dilation, they hadronize outside the nucleus at high energies. The depletion observed shows no $Q^2$ or $$X_{BJ}$$ dependence, indicating that nuclear attenuation is independent of ;he virtual photon properties and of the quark flavour.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1372875
• Report Number(s): FERMILAB-THESIS--1991-36; UMI--91-30738; 322726
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS