Spin asymmetries in {gamma} N {yields} {bar K}* {Theta}{sup +}
Journal Article
·
· Nuclear Physics, A
OSTI ID:836842
The photoproduction processes of the exotic {Theta}{sup +}(1540) baryon and the K* meson from the nucleon targets, i.e., {gamma}n {yields} K*{sup -} {Theta}{sup +} and {gamma}p {yields} {bar K}*{sup 0}{Theta}{sup +} are investigated in a hadronic model. We consider K and K* exchanges as well as the s and u channel nucleon and {Theta} terms. Various spin asymmetries together with cross sections are first computed in order to study the production mechanisms and the parity of the {Theta}{sup +}(1540) baryon. Within the uncertainties arising from the model-dependence of the production mechanisms and several coupling constants, we find that some target-recoil double spin asymmetries, C{sub xx{prime}}{sup TR} and C{sub xx{prime}}{sup TR} are sensitive to the parity of {Theta}{sup +}. In addition, the parity asymmetry of this reaction on the neutron target, which can be obtained by analyzing K* decay distribution, is found to be useful to estimate the K* N{Theta} coupling.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- US Department of Energy; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836842
- Report Number(s):
- JLAB-THY-03-223; DOE/ER/40150-3141; hep-ph/0312229
- Journal Information:
- Nuclear Physics, A, Journal Name: Nuclear Physics, A Vol. 745; ISSN 0375-9474; ISSN NUPABL
- Country of Publication:
- United States
- Language:
- English
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