Download or read book A Study of The Alpha Sub 0 980 Meson in Radiative J Psi Decays written by and published by . This book was released on 1990 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the decay sequence J/? →?X, X → a0{sup {plus minus}}(980)?{sup {minus plus}}, a0{sup {plus minus}}(980) →??{sup {plus minus}}, where X is the f1(1285) or?(1400), the?? vs??− Dalitz plot intensity distributions are fitted with a model containing a coupled-channel parametrization of the a0(980). Preliminary values for the spin of X, the mass and width of the a0{sup {plus minus}}(980) to??{sup {plus minus}}, and the ratio of a0+(980) coupling strengths, g{sub K}2/g{sub?}2, to {bar K}°K+ and??+ are determined. From this model, the predictions for the ratios of branching ratios r{sub X} = B(X → a0(980)?){center dot}B(a0(980) → K{bar K})/B(X → a0{sup {plus minus}}(980)?){center dot}B(a0{sup {plus minus}}(980) →??{sup {plus minus}}) are compared with those obtained from MARK III Partial Waves analyses of the decays J/? →?K{sub s}°K{sup {plus minus}}?{sup {minus plus}} and J/? →?{eta}?+?−. 12 refs., 3 figs., 4 tabs.

Download or read book A Study of the Alphasub 0 980 Meson in Radiative J psi Decays written by W.S. Lockman and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiative Decays Involving A0 980 and F0 980 in the Vector Meson Dominance Model written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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]).

Download or read book Radiative Decays Involving A0 980 and F0 980 in the Vector Meson Dominance Model written by Masayasu Harada and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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}).

Download or read book Study of Scalar Mesons and Related Radiative Decays written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: After a brief review of the puzzling light scalar meson sector of QCD, a brief summary will be given of a paper concerning radiative decays involving the light scalars. There, a simple vector meson dominance model is constructed in an initial attempt to relate a large number of the radiative decays involving a putative scalar nonet to each other. As an application it is illustrated why a[sub 0](980)-f[sub 0](980) mixing is not expected to greatly alter the f[sub 0]/a[sub 0] production ratio for radiative[phi] decays.

Download or read book A Study of Meson Spectroscopy and Radiative J Psi Decay Into Four Charged Pions written by Steven G. Sutlief and published by . This book was released on 1995 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scalar Mesons in Phi Radiative Decay written by and published by . This book was released on 1993 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing predictions for the branching ratio for phi -> KK(sub)gamma ma phi -> S(sub)gamma (where S denotes one of the scalar mesons f(sub)0(975) and alpha(sub)0(980)) vary by several orders of magnitude. As a byproduct we find that the branching ratio for phi -> K^0K^0(sub)gamma is

Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Antiproton proton Spectrum in Radiative J Psi Decay written by Arla Dea Guy and published by . This book was released on 1990 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scalar Meson Effects in Radiative Decays of Vector Mesons written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of scalar mesons in radiative vector meson decays is investigated. The effects of scalar-isoscalar f_{0}(980) and scalar-isovector a_{0}(980) mesons are studied in the mechanism of the radiative Phi->pi{+}pi{-}gamma and phi->pi{0}eta gamma decays, respectively. A phenomenological approach is used to study the radiative phi->pi{+}p{-}gamma decay by considering the contributions of sigma-meson, rho-meson and f_{0}-meson. The interference effects between different contributions are analyzed and the branching ratio for this decay is calculated. The radiative phi->pi{0}eta gamma decay is studied within the framework of a phenomenological approach in which the contributions of rho-meson, chiral loop and a_{0}-meson are considered. The interference effects between different contributions are examined and the coupling constants g_{phi a_{0} gamma} and g_{a_{0}K{+}K{-}} are estimated using the experimental branching ratio for the phi->pi{0}eta gamma decay. Furthermore, the radiative rho{0}pi{+}pi{-}gamma$ and rho{0}->pi{0}pi{0}gamma decays are studied to investigate the role of scalar-isoscalar sigma-meson. The branching ratios of the rho{0}->pi{+}pi{-}gamma and rho{0}->pi{0}pi{0}gamma decays are calculated using a phenomenological approach by adding to the amplitude calculated within the framework of chiral perturbation theory and vector meson dominance the amplitude of sigma-meson intermediate state. In all the decays studied the scalar meson intermediate states make important contributions to the overall amplitude.

Download or read book Production of the F Sub 0 975 Meson in J Psi Decays written by and published by . This book was released on 1989 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results on the production and decay of the f0(975) meson in the processes J/? 2!???−, J/? 2!??°?°, J/? 2!?K+K−, and J/? 2!??+?− are reported on. The data sample, corresponding to 5.8 × 106 produced J/?'s, were collected with the MARK-III detector at SPEAR. In a coupled- channel fit to the invariant mass distribution of the?+?− system opposite the?, the f0(975) product branching ratios, resonance parameters and couplings to K+K− and?+?− are extracted. An upper limit on f0(975) production in conjunction with an? is presented. 15 refs., 4 figs., 4 tabs.

Download or read book Radiative Decay of the Psi 2S Into Two Pseudoscalar Mesons written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiative decays of the radically excited charmonium resonance, [psi](2S), into[pi][pi], K[bar K] and[eta][eta] final states have been measured in a sample of 3.96 x 10[sup 6][psi](2S) events collected by the BES collaboration. The branching ratios B([psi](2S)[yields][gamma]f[sub 2](1270))= (2.27[+-] 0.26[+-] 0.39) x 10[sup -4] and B([psi](2S)[yields][gamma]f[sub 0](1710)) x B(f[sub 0](1710)[yields] K[sup+]K[sup -])= (5.59[+-] 1.12[+-] 0.93) x 10[sup -5] are obtained. When compared to the corresponding radiative J/[psi] decays, the observed[psi](2S) radiative decay rates into[gamma]f[sub 2](1270) and[gamma]f[sub 0](1710) are consistent with the ''15%'' rule.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991-05 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book J psi Radiative Decay to Two Pseudoscalar Mesons from Mark III written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of amplitude analyses of the Mark III data on the K[sub s][sup 0]K[sub s][sup 0], K[sup+]K[sup -] and[pi][sup+][pi][sup -] systems produced in J/[psi] radiative decay are shown for the mass range 1--2 GeV. The intensity distributions for the amplitudes having J[sup PC] values 0[sup+2] and 2[sup+2] are presented and discussed. The observed strong production of the f[sub 0](1700) in J/[psi] radiative decay suggests that this state may consist primarily of the lightest scalar glueball state. No significant production of spin 2 is observed in the 1.7 GeV mass region.

Download or read book Radiative Decays of the Psi 3097 to Two Meson Final States written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MARK III detector operating at the SPEAR storage ring has acquired a sample of 2.7 x 106 produced psi(3097)'s. These events are used to investigate the radiative decays of the psi to two meson final states. Such decays are of topical interest because of the unusual QCD laboratory they provide - of particular interest is the possibility of observing glueball states. The process psi ..-->.. ..gamma pi ... pi..− is studied. The f(1270) tensor meson is observed and the helicity structure of its production is measured. The data indicate that helicity 2 is suppressed, in disagreement with lowest order QCD calculations. Evidence is presented for the first observation of the theta(1700) in the ..pi ... pi..− final state. The strong, but not complete, suppression of this state in the ..pi pi.. channel, combined with the absence of a J/sup P/ = 2+ signal in a recent MARK III analysis of psi ..-->.. ..gamma.. rho rho, suggest a very mysterious nature for the theta(1700). The process psi ..-->.. ..gamma..K+K− is also studied. The f'(1515) tensor meson is observed with a branching ratio in agreement with the SU(3) symmetry prediction for the standard two gluon radiative decay diagram with no mixing corrections. The helicity structure of the f'(1515) is measured for the first time, and is found to be similar to that of the f(1270). The theta(1700) is observed with high statistics. Its spin and parity are measured, with the result that J/sup P/ = 2+ is preferred over J/sup P/ = 0+ at the 99.9% C.L. In addition, evidence is presented for a remarkable narrow state, designated the xi(2220). Its parameters are measured to be: m = 2.218 +- 0.003 +- 0.010 GeV, GAMMA less than or equal to 0.040 GeV at 95% C.L., and BR(psi ..-->.. ..gamma..xi(2220))BR(xi(2220) ..-->.. K+K−) = (5.7 +- 1.9 +- 1.4) x 10−5.

Download or read book Gluonic Mesons in J psi Radiative Decay written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: