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Raue, B. A.; Carman, D. S.

doi:10.1103/physrevc.71.065209

Cited by 18 publications

(16 citation statements)

References 20 publications

(50 reference statements)

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“…K > 0.5 where t-channel processes dominate, suggesting a dominant influence of the transverse component of the virtual photon. Previous electroproduction results from CLAS [35,37,50] showed that σ L is small in this kinematic range, even at backward kaon angles. However, the large difference between the photo-and electroproduction results seen here suggests that although the longitudinal polarization of the virtual photon by itself may not play a significant role, even a small contribution in the interference terms may cause a sizable contribution for this observable.…”

Section: Resultsmentioning

confidence: 74%

Induced polarization ofΛ(1116)in kaon electroproduction

Gabrielyan¹,

Raue²,

Carman³

et al. 2014

Phys. Rev. C

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We have measured the induced polarization of the Λ(1116) in the reaction ep → e K + Λ, detecting the scattered e and K + in the final state along with the proton from the decay Λ → pπ − . The present study used the CEBAF Large Acceptance Spectrometer (CLAS), which allowed for a large kinematic acceptance in invariant energy W (1.6 ≤ W ≤ 2.7 GeV) and covered the full range of the kaon production angle at an average momentum transfer Q 2 =1.90 GeV 2 . In this experiment a 5.50 GeV electron beam was incident upon an unpolarized liquid-hydrogen target. We have mapped out the W and kaon production angle dependencies of the induced polarization and found striking differences from photoproduction data over most of the kinematic range studied. However, we also found that the induced polarization is essentially Q 2 independent in our kinematic domain, suggesting that somewhere below the Q 2 covered here there must be a strong Q 2 dependence. Along with previously published photo-and electroproduction cross sections and polarization observables, these data are needed for the development of models, such as effective field theories, and as input to coupled-channel analyses that can provide evidence of previously unobserved s-channel resonances.

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Section: Resultsmentioning

confidence: 74%

Induced polarization ofΛ(1116)in kaon electroproduction

Gabrielyan¹,

Raue²,

Carman³

et al. 2014

Phys. Rev. C

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“…Our previously published polarization transfer results [10] taken at a beam energy of 2.567 GeV were used to extract R σ at cos θ c.m. K = 1 for three points of W and Q 2 [23]. In a similar way, R σ can be extracted from the 4.261 and 5.754 GeV CLAS data.…”

Section: A Polarization Component Definitionsmentioning

confidence: 94%

“…Following the procedure defined in Ref. [23], the extrapolation is actually performed by summing the P ′ z ′ and P ′ z components into a new quantity R sum (see Table III σ U at our kinematic points.…”

Section: Extraction Of the Ratio Of σL /σTmentioning

confidence: 99%

Beam-recoil polarization transfer in the nucleon resonance region in the exclusivee→p→e'K+
Carman¹,
Raue²,
Adhikari³
et al. 2009
Phys. Rev. C
46
0
27
0
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Beam-recoil transferred polarizations for the exclusive ep → e K + , 0 reactions have been measured using the Continuous Electron Beam Accelerator Facility's large acceptance spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. New measurements have been completed at beam energies of 4.261 and 5.754 GeV that span a range of momentum transfer Q 2 from 0.7 to 5.4 GeV 2 , invariant energy W from 1.6 to 2.6 GeV, and the full center-of-mass angular range of the K + meson. These new data add to the existing CLAS 0556-2813/2009/79(6)/065205 (23) 065205-1 PHYSICAL REVIEW C 79, 065205 (2009) K + measurements at 2.567 GeV, and provide the first-ever data for the K + 0 channel in electroproduction.Comparisons of the data with several theoretical models are used to study the sensitivity to s-channel resonance contributions and the underlying reaction mechanism. Interpretations within two semiclassical partonic models are made to probe the underlying reaction mechanism and the ss quark-pair creation dynamics.

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“…The CLAS program has yielded by far the most extensive and precise measurements of KY electroproduction data ever measured across the nucleon resonance region. These measurements have included the separated structure functions σ T , σ L , σ U = σ T + ǫσ L , σ LT , σ T T , and σ LT ′ for K + Λ and K + Σ 0 [13,14,15,16], recoil polarization for K + Λ [17], and beam-recoil transferred polarization for K + Λ and K + Σ 0 [18,19]. For the hyperon polarization measurements, we have taken advantage of the self-analyzing nature of the weak decay of the Λ.…”

Section: Clas N * Programmentioning

confidence: 99%

Nucleon Resonance Structure Studies via Exclusive KY Electroproduction

Carman

2016

Few-Body Syst

Self Cite

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Studying the structure of excited nucleon states employing the electroproduction of exclusive reactions is an important avenue for exploring the nature of the non-perturbative strong interaction. The electrocouplings of N * states in the mass range below 1.8 GeV have been determined from analyses of CLAS πN , ηN , and ππN data. This work has made it clear that consistent results from independent analyses of several exclusive channels with different couplings and non-resonant backgrounds but the same N * electro-excitation amplitudes, is essential to have confidence in the extracted results. In terms of hadronic coupling, many high-lying N * states preferentially decay through the ππN channel instead of πN . Data from the KY channels will therefore be critical to provide an independent analysis to compare the extracted electrocouplings for the high-lying N * states against those determined from the πN and ππN channels. A program to study excited N * state structure in both non-strange and strange exclusive electroproduction channels using CLAS12 will measure differential cross sections and polarization observables to be used as input to extract the γvN N * electrocoupling amplitudes for the most prominent N * states in the range of invariant energy W up 3 GeV in the virtually unexplored domain of momentum transfers Q 2 up to 12 GeV 2 .

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Ratio ofσL/σTforp(e,e'

Cited by 18 publications

References 20 publications

Induced polarization ofΛ(1116)in kaon electroproduction

Induced polarization ofΛ(1116)in kaon electroproduction

Beam-recoil polarization transfer in the nucleon resonance region in the exclusivee→p→e'K+
Carman¹,
Raue²,
Adhikari³
et al. 2009
Phys. Rev. C
46
0
27
0
View full text Add to dashboard Cite

Nucleon Resonance Structure Studies via Exclusive KY Electroproduction

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Ratio ofσL/σTforp(e,e'

Cited by 18 publications

References 20 publications

Induced polarization ofΛ(1116)in kaon electroproduction

Induced polarization ofΛ(1116)in kaon electroproduction

Beam-recoil polarization transfer in the nucleon resonance region in the exclusivee→p→e'K+Carman1, Raue2, Adhikari3 et al. 2009Phys. Rev. C460270View full textAdd to dashboardCite

Nucleon Resonance Structure Studies via Exclusive KY Electroproduction

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Product

Resources

About

Beam-recoil polarization transfer in the nucleon resonance region in the exclusivee→p→e'K+
Carman¹,
Raue²,
Adhikari³
et al. 2009
Phys. Rev. C
46
0
27
0
View full text Add to dashboard Cite