Study of Rare Radiative Phi Decays at Jefferson Lab
Study of Rare Radiative Phi Decays at Jefferson Lab

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Published: 1999

Total Pages:

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The RadPhi Collaboration has proposed using the intense tagged photon beam in Hall B at TJNAF to produce [phi] mesons and measure the branching ratios of [phi]'s decaying into the a0(980)g and f0(980)[gamma] all-neutral final states. The comparison of branching ratios for these two decay modes should provide crucial information on the quark substructure of a0(980) and f0(980) scalar mesons. Three engineering runs conducted so far measured the photon beam profile, instantaneous rates, pileups and dead times in the detector components, as well as energy and timing resolutions of RadPhi detectors. The measurements demonstrated that the proposed experiment is capable of detecting rare radiative [phi] decays with branching ratios greater than 10−5.

Chiral Dynamics
Chiral Dynamics

Author: Aron M. Bernstein

Publisher: World Scientific

Published: 2001

Total Pages: 495

ISBN-13: 9812810978

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This book provides an authoritative, up to date, overview of the field of chiral dynamics, and also provides an excellent introduction to the field. The workshop is known for the interplay of theory and experiment and as a meeting place for most of the leading researchers in the field. Contents: Theoretical Chiral Dynamics (H Leutwyler); Experimental Chiral Dynamics (A Bernstein); CEBAF at Jefferson Lab, an Overview (B Mecking); Lorentz Invariant Baryon CHPT (T Becher); Sigma-Terms (J Gasser & M Sainio); Theory of Hadronic Atoms (A Rusetsky); Effective Field Theory in Nuclear Physics (M Savage); Nucleon Polarizabilities (B Holstein); Chiral Symmetry in Dense Hadronic Matter (W Weise); The GerasimovOCoDrellOCoHearn Sum Rule (D Drechsel); and other papers. Readership: Researchers, academics and graduate students in nuclear and high energy physics."

Proceedings of the 16th and 17th Annual Hampton University Graduate Studies (HUGS) Summer Schools on Quarks, Hadrons, and Nuclei
Proceedings of the 16th and 17th Annual Hampton University Graduate Studies (HUGS) Summer Schools on Quarks, Hadrons, and Nuclei

Author: Jos‚ L. Goity

Publisher: World Scientific

Published: 2004

Total Pages: 364

ISBN-13: 9789812702791

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This volume contains lectures presented at the Sixteenth and Seventeenth Annual Hampton University Graduate Studies at the Continuous Electron Beam Accelerator Facility (HUGS at CEBAF) Summer Schools. The HUGS summer school brings pedagogical lectures to graduate students who are working on doctoral theses in nuclear physics. It has a balance of theory and experiment, and lecturers address topics of high current interest in strong interaction physics, particularly in electron scattering. Many HUGS lecturers lead major experimental efforts, and are internationally renowned for their contributions to the field. The proceedings have been selected for coverage in: . OCo Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings). OCo CC Proceedings OCo Engineering & Physical Sciences."

Radiative Decays Involving Light Scalar Mesons
Radiative Decays Involving Light Scalar Mesons

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Published: 2002

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We present a vector dominance model to describe radiative decays involving the light scalar mesons. Assuming that the light scalar mesons form a nonet this model gives relations among various decay amplitudes of the form S--> gamma gamma, V-->Sgamma and S--> Vgamma, where S and V denote scalar and vector mesons. By comparing with experimental radiative decay rates, including those recently measured for phi--> PP'gamma, we obtain various predictions. We discuss briefly ongoing extensions of the present work in an attempt to describe the radiative phi decay measurements in detail.

Observation of the Radiative Decay J
Observation of the Radiative Decay J

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Published: 1987

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The MARK III Collaboration has studied the OZI violating radiative decay J/psi .-->. .gamma. phi .omega., in order to complete the set of measured J/psi .-->. .gamma. vector vector decays. This channel is then used to search for a new decay mode of the xi(2330) and to study the eta/sub c/ decay mechanism. The phi .omega. mass spectrum does not show any significant structure; upper limits for the excitation of the xi and eta/sub c/ particles are obtained. 11 refs., 3 figs.

Radiative Decays Involving A0(980) and F0(980) in the Vector Meson Dominance Model
Radiative Decays Involving A0(980) and F0(980) in the Vector Meson Dominance Model

Author: Masayasu Harada

Publisher:

Published: 2003

Total Pages:

ISBN-13:

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We summarize some features of the vector meson dominance model which was recently proposed for studying radiative decays involving the scalar mesons. Using the experimental values of {Gamma}(a{sub 0} {yields} {gamma}{gamma}), {Gamma}(f{sub 0} {yields} {gamma}{gamma}) and {Gamma}({phi} {yields} a{sub 0} {gamma}) as inputs, we show that the model predicts a large hierarchy between {Gamma}(a{sub 0} {yields} {omega}{gamma}) and {Gamma}(a{sub 0} {yields} {rho}{gamma}) as well as between {Gamma}(f{sub 0} {yields} {omega}{gamma}) and {Gamma}(f{sub 0} {yields} {rho}{gamma}).