Download or read book A New Measurement of the Rare Decay Eta Pi0 Gamma Gamma with the Crystal Ball TAPS Detectors at the Mainz Microtron written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new measurement of the rare, doubly radiative decay eta->pi0̂ gamma gamma was conducted with the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. New data on the dependence of the partial decay width, Gamma(eta->pi0̂ gamma gamma), on the two-photon invariant mass squared, m2̂(gamma gamma), as well as a new, more precise value for the decay width, Gamma(eta->pi0̂ gamma gamma) = (0.33+/-0.03_tot) eV, are based on analysis of 1.2 x 103̂ eta->pi0̂ gamma gamma decays from a total of 6 x 107̂ eta mesons produced in the gamma p -> eta p reaction. The present results for dGamma(eta->pi0̂ gamma gamma)/dm2̂(gamma gamma) are in good agreement with previous measurements and recent theoretical calculations for this dependence.
Download or read book Measurement of the Branching Ratio of eta to Pi0 2gamma with the Crystal Ball Detector written by Neil Scott Knecht and published by . This book was released on 2002 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the decay of the gamma 1S und gamma 2S resonances to muon pairs and determination of the strong coupling constant using the crystal ball detector written by Michael Kobel and published by . This book was released on 1991 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Rare Decay K L Pi0 Gamma Gamma at KTeV written by and published by . This book was released on 2007 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors study on the rare decay K{sub L} 2![pi]°[gamma][gamma], measure a{sub V}, and branching ratio by analyzing 96, 97 and 99 data. The measurements were taken by KTeV at Fermi National Accelerator Laboratory. After all cuts, they have 1982 K{sub L} 2![pi]°[gamma][gamma] candidate. The background level is estimated as 30%. K{sub L} 2![pi]°[gamma][gamma] branching ratio is measured as (1.29 ± 0.03(stat) ± 0.04(sys)) x 10−6. By using D'Ambrosio's theory to fit a{sub V}, a{sub V} = -( -0.31 ± 0.05(stat) ± 0.07(sys)).
Download or read book A Search for the Rare Decay Mu E Gamma Gamma written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental search for the lepton-family number nonconserving decay, .mu. .-->. e.gamma gamma., has been conducted at the Clinton P. Anderson Meson Physics Facility (LAMPF) using the Crystal Box detector. The detector consists of a modular NaI(Tl) calorimeter, scintillator hodoscope, and a high-resolution, cylindrical drift chamber. It provides a large solid-angle for detecting three-body decays and has good resolutions in the time, position, and energy measurements to eliminate unwanted backgrounds. No evidence for .mu.+ .-->. e+.gamma gamma. is found, giving an upper limit for the branching ratio of GAMMA(.mu. .-->. e.gamma gamma.)/GAMMA(.mu. .-->. e nu anti nu) less than or equal to 7.2 x 10−11 (90% C.L.). This result is an improvement of more than two orders of magnitude in the existing limit. 109 refs., 39 figs.
Download or read book Study on the Decay of KL to Pi0 Gamma Gamma written by Jianbo Wang and published by . This book was released on with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study on the rare decay
Download or read book Crystal Ball Studies of Giant Resonance Gamma Decay written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have carried out coincidence experiments to investigate the photon and neutron emission from the giant resonance region in 2°8Pb and 9°Zr using the ORNL Spin Spectrometer, a 72-segment NaI detector system. States in 2°8Pb and 9°Zr were excited by inelastic scattering of 380-MeV 17O. We have determined the total gamma-decay probability, the ground-state gamma branching ratio, and the branching ratios to a number of low-lying states as a function of excitation energy in 2°8Pb to approx. 15 MeV. Especially interesting observations include the absence of a significant branch from the giant quadrupole resonance to the 3− state at 2.6 MeV, a strong branch from this resonance to a 3− state at 4.9 MeV, and the dominance of decays to various 1− states at 5 to 7 MeV from the region around 14 MeV of excitation (EO resonance). Comparable but less complete data were also obtained on 9°Zr. 14 references.
Download or read book Brief Review of Recent Results from the Crystal Ball Detector at SPEAR written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance results are presented for the Crystal Ball detector at SPEAR. Topics covered include: inclusive photon spectra from J/psi and psi' decays; photon cascade decays of the psi'; three-.gamma. decays of J/psi and psi'; and inclusive eta production. (GHT).
Download or read book First observation of the reaction gamma gamma p p p written by Deutsches Elektronen-Synchrotron (Hamburg). 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 A Study of eta pi Decay Using the Quark box Diagram written by John N. Ng and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Measurement of the Radiative Process K p Lambda Gamma at Beam Momenta 520 750 MeV c Using the Crystal Ball Detector written by Nakorn Phaisangittisakul and published by . This book was released on 2001 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prototype Development for a New Readout of the CB A2 Setup and Analysis of the Relative Branching Fraction of the Eta Omega Gamma Decay written by Andreas Neiser and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Decay tau 3 pi eta gamma ny tau with the DELPHI Detector at LEP written by Paolo Privitera and published by . This book was released on 1993 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Decay Upsilon S2 approaches Pi Pi Upsilon 1S written by CRYSTAL BALL Collaboration and published by . This book was released on 1985 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Observation of the Rare Decay K Pion Gamma Gamma written by Richard Andrew Soluk and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Gamma Gamma Pi0 Transition Form Factor written by and published by . This book was released on 2009 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for the Rare Decay mu E gamma gamma written by David Paul Grosnick and published by . This book was released on 1987 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
