Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam

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dc.contributor.advisorRoberts, Jabus B.en_US
dc.creatorWhite, Joseph LaSalleen_US
dc.date.accessioned2009-06-04T00:41:47Zen_US
dc.date.available2009-06-04T00:41:47Zen_US
dc.date.issued1991en_US
dc.description.abstractThe analyzing power, A$\sb{\rm N},$ in inclusive $\pi\sp{+}$ and $\pi{-}$ production by a 200 GeV/c polarized proton beam was found to have a striking $x\sb{F}$ dependence in which the magnitude of A$\sb{\rm N}$ increases from 0 to 0.42 for the $\pi\sp{+}$ data and decreases from 0 to $-0.38$ for the $\pi\sp{-}$ data for increasing $x\sb{F}$ over the kinematic range $0.2 \le x\sb{F} \le 0.9$ and 0.2$GeV/c \le p\sb{T} \le 2.0GeV/c.$ The higher values of $x\sb{F}$ and $p\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this experiment. It also correctly predicts the magnitudes of the $\pi\sp{+}$ and $\pi\sp\circ$ analyzing power at high $x\sb{F}$ but the $\pi\sp{-}$ analyzing power is twice the predicted value. The $\pi\sp{+},$ $\pi\sp{-},$ and $\pi\sp\circ$ analyzing powers were also measured with a polarized anti-proton beam. These data and their interpretation with the simple model suggest that the transverse spin of the proton can be correlated with its quarks in certain kinematic regions, however, the details are still not well understood.en_US
dc.format.extent101 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Phys. 1992 Whiteen_US
dc.identifier.citationWhite, Joseph LaSalle. "Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam." (1991) Diss., Rice University. <a href="https://hdl.handle.net/1911/16585">https://hdl.handle.net/1911/16585</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/16585en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectParticle physicsen_US
dc.subjectElementary particlesen_US
dc.subjectHigh energy physicsen_US
dc.titleMeasurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beamen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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