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Book Lambda Polarization in Photoproduction

Download or read book Lambda Polarization in Photoproduction written by Kurishinkal Joseph Cleetus and published by . This book was released on 1968 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Polarization of Lambda 0 Hyperons in Quasi real Photoproduction

Download or read book The Polarization of Lambda 0 Hyperons in Quasi real Photoproduction written by Michiel Demey and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Lambda Polarization in Exclusive Electro and Photoproduction at CLAS

Download or read book Lambda Polarization in Exclusive Electro and Photoproduction at CLAS written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The CLAS collaboration at JLab has recent results on[Lambda] polarization for both electroproduction and photoproduction of K[sup+][Lambda] exclusive states. I note the striking phenomenological trends in the data and discuss the underlying physics which might give rise to these phenomena; both in the context of an e.ective Lagrangian formalism, where the degrees of freedom are intermediate mesons and baryons, and also in the context of a simple quark picture. The quark model argument leads to the conclusion that the s and[bar s] quarks are produced with spins anti-aligned, in apparent contradiction to the popular[sup 3]P[sub 0] model of quark pair creation in which the pair is created with vacuum quantum numbers (J=0 and positive parity), i.e. in an S=1, L=1, J=0 angular momentum state.

Book Lambda Polarization in Exclusive Electro and Photoproduction at CLAS

Download or read book Lambda Polarization in Exclusive Electro and Photoproduction at CLAS written by Mac Mestayer and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CLAS collaboration at JLab has recent results on {Lambda} polarization for both electroproduction and photoproduction of K{sup +}{Lambda} exclusive states. I note the striking phenomenological trends in the data and discuss the underlying physics which might give rise to these phenomena; both in the context of an e.ective Lagrangian formalism, where the degrees of freedom are intermediate mesons and baryons, and also in the context of a simple quark picture. The quark model argument leads to the conclusion that the s and {bar s} quarks are produced with spins anti-aligned, in apparent contradiction to the popular {sup 3}P{sub 0} model of quark pair creation in which the pair is created with vacuum quantum numbers (J=0 and positive parity), i.e. in an S=1, L=1, J=0 angular momentum state.

Book Lambda Polarization in Exclusive Electro and Photoproduction

Download or read book Lambda Polarization in Exclusive Electro and Photoproduction written by Mac Mestayer and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I present recent results from the CLAS collaboration on Lambda and Sigma^0 polarization for both electroproduction and photoproduction of K^+Lambda and K^+Sigma^0 exclusive states. I interpret these data using a simple quark model, leading to the surprising conclusion that the s and s(pol) quarks are produced with spins anti-aligned, in apparent contradiction to the popular ^3P_0 model of quark pair creation.

Book Recoil Polarization in K Lambda Photoproduction at 5 GeV

Download or read book Recoil Polarization in K Lambda Photoproduction at 5 GeV written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Transverse Polarization of and Hyperons in Quasireal Photoproduction

Download or read book Transverse Polarization of and Hyperons in Quasireal Photoproduction written by and published by . This book was released on 2007 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies of Lambda N Interaction Through Polarization Observables for Final state Interactions in Exclusive Lambda Photoproduction Off the Deuteron

Download or read book Studies of Lambda N Interaction Through Polarization Observables for Final state Interactions in Exclusive Lambda Photoproduction Off the Deuteron written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical studies suggest that experimental observables for hyperon production reactions can place stringent constraints on the free parameters of hyperon-nucleon potentials, which are critical for the understanding of hypernuclear matter and neutron stars. Here we present preliminary experimental results for the polarization observables S, Py, Ox, Oz, Cx, and Cz for final-state interactions (FSI) in exclusive L photoproduction off the deuteron. The observables were obtained from data collected during the E06-103 (g13) experiment with the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at Jefferson Lab. The g13 experiment ran with unpolarized deuteron target and circularly- and linearly-polarized photon beams with energies between 0.5 GeV and 2.5 GeV and collected about 51010 events with multiple charged particles in the final state. To select the reaction of interest, the K+ and the L decay products, a proton and a negative pion, were detected in the CLAS. The missing-mass technique was used to identify exclusive hyperon photoproduction events. Final-state interaction events were selected by requesting that the reconstructed neutron has a momentum larger than 200 MeV/c. The large statistics of E06-103 provided statistically meaningful FSI event samples, which allow for the extraction of one- and two-fold differential single- and double-polarization observables. Here we present preliminary results for a set of six observables for photon energies between 0.9 GeV and 2.3 GeV and for several kinematic variables in the Ln center-of-mass frame. Our results are the very first estimates of polarization observables for FSI in hyperon photoproduction and will be used to constrain the free parameters of hyperon-nucleon potentials.

Book Polarization in Inclusive Lambda Production

Download or read book Polarization in Inclusive Lambda Production written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: At high energies the reaction p + N .-->. .lambda.° + X yields .lambda.°s which are strongly polarized. The behavior of this polarization should give information about quark production mechanisms. The inclusive .lambda.° polarization is also compared with anti .lambda.°, and proton polarization in the fragmentation region of the incident proton at Fermilab energies.

Book Polarization of Hyperons in Elementary Photoproduction

Download or read book Polarization of Hyperons in Elementary Photoproduction written by Reinhard Schumacher and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent measurements using the CLAS detector at Jefferson Lab of the reactions {gamma} + p {yields} K{sup +} + {Lambda} and {gamma} + p {yields} K{sup +} + {Sigma}{sup 0} have been used to extract the spin transfer coefficients C{sub x} and C{sub z} for the first time. These observables quantify the degree of the photon circular polarization that is transferred to the recoiling hyperons in the scattering plane. The unexpected result is that {Lambda} hyperons are produced '100% polarized' as seen when combining C{sub x} and C{sub z} with the induced transverse polarization, P. Furthermore, C{sub x} and C{sub z} seem to be linearly related. This paper discusses the experimental results and offers a hypothesis which can explain these observations. We show how the produced strange quark can be subject to a pure spin-orbit type of interaction which preserves its state of polarization throughout the hadronization process.

Book A Study of K Lambda Photoproduction in the CLAS G11a Dataset

Download or read book A Study of K Lambda Photoproduction in the CLAS G11a Dataset written by Michael Evan McCracken and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Polarization of lambda Hyperons in the Reaction gamma P yields K lambda

Download or read book Polarization of lambda Hyperons in the Reaction gamma P yields K lambda written by Helen Thom Edwards and published by . This book was released on 1966 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: