Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2010
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| Online Access: | http://hdl.handle.net/1721.1/53214 |
| _version_ | 1826199233033666560 |
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| author | Hoffman, Alan Michael |
| author2 | Richard Milner. |
| author_facet | Richard Milner. Hoffman, Alan Michael |
| author_sort | Hoffman, Alan Michael |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009. |
| first_indexed | 2024-09-23T11:16:30Z |
| format | Thesis |
| id | mit-1721.1/53214 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:16:30Z |
| publishDate | 2010 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/532142019-04-10T12:42:25Z Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. Hoffman, Alan Michael Richard Milner. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of Physics. Physics. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009. In title on title page, "the square root of sigma" appears as the mathematical symbol, and "sigma" appears as the lower-case Greek letter. Cataloged from PDF version of thesis. Includes bibliographical references (p. 123-126). Twenty years of polarized lepton-nucleon scattering experiments have found that the contribution from quark spins (1/2[delta] [sigma]) to the spin of the proton is only ~ 35%. This has lead researchers to look elsewhere, specifically to gluon spin ([delta sigma]) for a large contribution to proton spin. [delta sigma] has been only loosely constrained in polarized DIS and SIDIS experiments. Polarized proton-proton collisions at RHIC provide sensitivity to [delta sigma] through measurements of the longitudinal double-spin asymmetry, ALL. This work presents a measurement of ALL for inclusive 7ro production in polarized proton-proton collisions using the STAR detector and data from RHIC Run 6. 7r0s are abundantly produced at mid-rapidity in proton-proton collisions, making them natural candidates for studies of [delta] [sigma]. Novel techniques for reconstructing 7ros at STAR are discussed, and a measurement of the unpolarized cross section presented. Finally, the measured ALL is compared to perturbative QCD predictions and from this comparison constraints are placed on [delta] [sigma]. by Alan Michael Hoffman. Ph.D. 2010-03-25T15:15:46Z 2010-03-25T15:15:46Z 2009 2009 Thesis http://hdl.handle.net/1721.1/53214 528809413 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 126 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Hoffman, Alan Michael Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title | Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title_full | Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title_fullStr | Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title_full_unstemmed | Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title_short | Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at [the square root of sigma] = 200 GeV. |
| title_sort | longitudinal double spin asymmetry and cross section for inclusive neutral pion production in polarized proton collisions at the square root of sigma 200 gev |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/53214 |
| work_keys_str_mv | AT hoffmanalanmichael longitudinaldoublespinasymmetryandcrosssectionforinclusiveneutralpionproductioninpolarizedprotoncollisionsatthesquarerootofsigma200gev |