Exclusive electroproduction of K+Lambda and K+Sigma(0) final states at Q(2)=0.030-0.055 (GeV/c)(2)
Result description
Cross-section measurements of the exclusive p(e, e' K+)Lambda, Sigma(0) electroproduction reactions have been performed at the Mainz Microtron MAMI in the A1 spectrometer facility using for the first time the Kaos spectrometer for kaon detection. These processes were studied in a kinematical region not covered by any previous experiment. The nucleon was probed in its third-resonance region with virtual photons of low four-momenta, Q(2) - 0.030-0.055 (GeV/c)(2). The MAMI data indicate a smooth transitionin Q(2) from photoproduction to electroproduction cross-sections. Comparison with predictions of effective Lagrangian models based on the isobar approach reveal that strong longitudinal couplings of the virtual photon to the N* resonances can be excluded from these models. Modern isobar and Regge-plus-resonance models are in agreement with the data.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Exclusive electroproduction of K+Lambda and K+Sigma(0) final states at Q(2)=0.030-0.055 (GeV/c)(2)
Original language description
Cross-section measurements of the exclusive p(e, e' K+)Lambda, Sigma(0) electroproduction reactions have been performed at the Mainz Microtron MAMI in the A1 spectrometer facility using for the first time the Kaos spectrometer for kaon detection. These processes were studied in a kinematical region not covered by any previous experiment. The nucleon was probed in its third-resonance region with virtual photons of low four-momenta, Q(2) - 0.030-0.055 (GeV/c)(2). The MAMI data indicate a smooth transitionin Q(2) from photoproduction to electroproduction cross-sections. Comparison with predictions of effective Lagrangian models based on the isobar approach reveal that strong longitudinal couplings of the virtual photon to the N* resonances can be excluded from these models. Modern isobar and Regge-plus-resonance models are in agreement with the data.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Result continuities
Project
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal A
ISSN
1434-6001
e-ISSN
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Volume of the periodical
48
Issue of the periodical within the volume
14
Country of publishing house
DE - GERMANY
Number of pages
8
Pages from-to
1-8
UT code for WoS article
000300898300010
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2012