72,238 research outputs found

    Sigma, Kappa and fo(980) in E791 and BES II data

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    Both sigma and kappa are well established from E791 data on D->3pi and D->K-pi-pi$ and BES II data on J/Psi->omega-pi-pi and KKpipi. Fits to these data are accurately consistent with pi-pi and Kpi elastic scattering when one allows for the Adler zero which arises from Chiral Symmetry Breaking. The phase variation with mass is also consistent between elastic scattering and production data.Comment: 15 pages, 8 figures. A shortened version of hep-ex.0510014, conforming to page restrictions for Hadron05 Proceeding

    Letter, n.d., from Jester J. Hairston to Eva Jessye

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    2 pages, Hairston was a choral conductor, a composer, and an actor. Kurt Adler, Misha Bakalinikoff, and Marge (Isabelle Margaret Swanigan), Hairston\u27s wife, are mentioned

    Comment on "Infrared freezing of Euclidean QCD observables"

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    Recently, P. M. Brooks and C.J. Maxwell [Phys. Rev. D{\bf 74} 065012 (2006)] claimed that the Landau pole of the one-loop coupling at Q2=Λ2Q^2=\Lambda^2 is absent from the leading one-chain term in a skeleton expansion of the Euclidean Adler D{\cal D} function. Moreover, in this approximation one has continuity along the Euclidean axis and a smooth infrared freezing, properties known to be satisfied by the "true" Adler function. We show that crucial in the derivation of these results is the use of a modified Borel summation, which leads simultaneously to the loss of another fundamental property of the true Adler function: the analyticity implied by the K\"allen-Lehmann representation

    Quark Mixing Matrix Studies and Lepton Flavor Violation Searches Using Rare Decays of Kaons

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    I review recent results from experiments on rare decays of kaons, concentrating on searches for lepton flavor violation (LFV) and on measurements of quark mixing (CKM) matrix elements. The LFV results are the culmination of 15 years of experimentation at Brookhaven National Laboratory and are unlikely to be improved upon soon. The CKM studies derive from measurements of decay rates of charged and neutral kaons into lepton anti-lepton pairs, both with and without a charged or neutral pion. I discuss recent results and prospects for improved measurements that could provide an unambiguous test of the Standard Model explanation for CP violation. This paper is the written version of a talk presented at the Lepton-Photon Conference in August 1999.Comment: Written version of a talk at the 1999 Lepton Photon Conferenc

    Transverse Dynamics at RHIC

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    Studies of , transverse momentum spectra and anisotropy flow from nuclear collisions at RHIC indicate early thermalization and strong collective expansion. We propose a systematic study of the anisotropy parameter v2v_2 and the transverse momentum distributions of ϕ,Ω,D0,ΛC\phi, \Omega, D^0, \Lambda_C and J/ψJ / \psi in order to extract information on partonic collective flow.Comment: 4 pages, 3 figures; presented at Quark Matter 2002, Nantes, France, July 18-24, 2002. Proceedings to be published in Nucl. Phys.

    On the B\"acklund Transformation for the Moyal Korteweg-de Vries Hierarchy

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    We study the B\"acklund symmetry for the Moyal Korteweg-de Vries (KdV) hierarchy based on the Kuperschmidt-Wilson Theorem associated with second Gelfand-Dickey structure with respect to the Moyal bracket, which generalizes the result of Adler for the ordinary KdV.Comment: 9 pages, Revte
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