Transverse Momentum and the Energy Flow of Charged Hadrons Produced in 490-GeV/C Deep Inelastic Muon Scattering

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

DOI:https://doi.org/10.2172/1426700· OSTI ID:1426700

Jansen, Douglas Maurice ^[1]

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1. Washington U., Seattle

The transverse momentum, energy flow, and azimuthal properties of charged hadrons produced in deep inelastic muon scattering are studied in this thesis. Data were taken by the E665 collaboration at Fermi Nat ion al Laboratory during the 1987- 88 fixed target run. The 490 GeV /c incident beam momentum allows one to study hadron fragmentation in a $W^2$ range that was not accessible to previous deep inelastic scattering experiments. Acceptance of the forward spectrometer limits the results presented in this thesis to $$X_F$$ > 0 particles. From the sample of events with a charged hadronic multiplicity greater or equal to four, transverse momentum criteria are used to select events with different topologies. A hadronic event plane is defined by requiring $$\Sigma P^2_{T,in}$$ to be a maximum. The transverse momentum of each hadron is decomposed into components $$P_{T,in}$$ and $$P_{T,out}$$ with respect to this event plane. A forward di-jet event structure is observed which is consistent with the QCD predictions of the Lund l\1onte Carlo. Predictions of the Lund Monte Carlo based upon matrix elements, parton showers, and color dipole radiation are shown. Semi-inclusive azimuthal distributions are presented in this thesis. The azimuthal angle is around the virtual photon direction and is defined with respect to the direction of the scattered muon. The azimuthal asymmetry dependence upon $$P_T$$, $$X_F$$, and $Q^2$ is studied. Average values of cos $$\phi$$, cos 2$$\phi$$, and sin $$\phi$$ are calculated and data are compared to numerical calculations of the hadron asymmetry.

• 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: 1426700
• Report Number(s): FERMILAB-THESIS-1991-35; UMI-91-31653; 322734
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS