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ohiou1288383782.pdf (5.58 MB)
ETD Abstract Container
Abstract Header
U-Spin Symmetry Test of the Σ
*+
Electromagnetic Decay
Author Info
Keller, Dustin M.
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1288383782
Abstract Details
Year and Degree
2010, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
Abstract
This dissertation presents analysis for electromagnetic decay of the Σ
0
(1385) from the reaction
γ p
→
K
+
Σ
*0
. Also presented is the first ever measurement of the electromagnetic decay of the Σ
+
(1385) from the reaction γ p → K
0
Σ
*+
. Both results are extracted from the
g
11
a
data set taken using the CLAS detector at Thomas Jefferson National Accelerator Facility. A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid hydrogen target during the experiment resulting in the photoproduction of the kaon and Σ
*
hyperons. Kinematic fitting is used to separate signal from background in each case. For the first time, a method to kinematically fit the neutron in the Electromagnetic Calorimeter (EC) of CLAS was performed, leading to a high statistics study of the neutron resolutions in the EC. New techniques in neutron resolution matching for Monte Carlo simulation using dynamic variable smearing are also developed. The results from the Σ
0
(1385) electromagnetic decay lead to smaller statistical and systematic uncertainties than the previous measurement by Taylor
et al
. A U-spin symmetry test using the U-spin SU(3) multiplet representation gave a prediction for the Σ
*+
→ Σ
+
γ partial width and the Σ
*0
→ Λγ partial width. The latter agrees, within the experimental uncertainties, with the prediction from U-spin symmetry, but the former reaction is much smaller than its prediction.
Committee
Kenneth Hicks, PhD (Advisor)
Todd Young, PhD (Committee Member)
Justin Franz, PhD (Committee Member)
Carl Brune, PhD (Committee Member)
Kenneth Hicks, PhD (Advisor)
Pages
288 p.
Subject Headings
Physics
Keywords
U-Spin Symmetry Test
;
Electromagnetic decay
;
Strange Baryons
;
Strange Sector Partial Width
;
meson cloud effect
Recommended Citations
Refworks
EndNote
RIS
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Citations
Keller, D. M. (2010).
U-Spin Symmetry Test of the Σ
*+
Electromagnetic Decay
[Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1288383782
APA Style (7th edition)
Keller, Dustin.
U-Spin Symmetry Test of the Σ
*+
Electromagnetic Decay.
2010. Ohio University, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1288383782.
MLA Style (8th edition)
Keller, Dustin. "U-Spin Symmetry Test of the Σ
*+
Electromagnetic Decay." Doctoral dissertation, Ohio University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1288383782
Chicago Manual of Style (17th edition)
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Document number:
ohiou1288383782
Download Count:
732
Copyright Info
© 2010, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.