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Author: Henning BerghaeuserPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Investigation of the Dalitz Decays and the Electromagnetic Form Factors of the _j63 [eta] and [pi]0-meson [pi-0-meson]
![Investigation of the Dalitz Decays and the Electromagnetic Form Factors of the _j63 [eta] and [pi]0-meson [pi-0-meson] PDF](https://books.google.com/books/content/images/frontcover/upr5mgEACAAJ?fife=w80-h100)
Author: Henning BerghaeuserInvestigation of the Dalitz Decays and the Electromagnetic Form Factors of the Η [eta] and Π0-meson [pi-0-meson]
![Investigation of the Dalitz Decays and the Electromagnetic Form Factors of the Η [eta] and Π0-meson [pi-0-meson] PDF](https://books.google.com/books/content/images/frontcover/eip60AEACAAJ?fife=w80-h100)
Author: Henning BerghaeuserInvestigation of the Dalitz Decays and the Electromagnetic Form Factors of the Eta and Pi on -meson
Author: Henning BerghäuserInvestigation of Dalitz Decays
Author: Henning BerghäuserPublisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN: 9783838124315
Category :
Languages : de
Pages : 268
Book Description
The investigation of Dalitz decays of neutral mesons is of general interest because the electromagnetic transition form factors observed in such decays provide a possibility to obtain information about the electromagnetic properties of the mesons as well as about their internal substructures. As a matter of fact quantum electrodynamics (QED) fails a correct prediction of Dalitz decays simply because the particles of focus are not point like. For that reason the vector meson dominance model (VMD) has been developed, which still requires further experimental verification. In the picture of VMD a virtual photon can couple to a vector meson as an intermediate state. With the CB/TAPS experiment at MAMI-C in Mainz, Germany, the Dalitz decays of the eta and the pion meson were measured and the associated transition form factors could be extracted. Moreover other decay modes of the pion, eta and the omega meson were investigated in order to determine the corresponding branching ratios. Beside a short theoretical introduction into the field of interest this work presents a full description of the experimental setup and contains detailed information about all steps of the analysis.
Rare Decays of Light Mesons
Author: Benjamin MayerPublisher: Atlantica Séguier Frontières
ISBN: 9782863320884
Category : CP violation (Nuclear physics)
Languages : en
Pages : 250
Book Description
Measurements of the Meson-Photon Transition Form Factors of Light Pseudoscalar Mesons at Large Momentum Transfer
Author: Publisher:
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Languages : en
Pages :
Book Description
Using the CLEO II detector, we have measured the differential cross sections for exclusive two-photon production of light pseudoscalar mesons[pi][sup 0], [eta], and[eta][prime]. From our measurements we have obtained the form factors associated with the electromagnetic transitions[gamma]*[gamma][yields] meson. We have measured these form factors in the momentum transfer ranges from 1.5 to 9, 20, and 30 GeV2 for[pi][sup 0], [eta], and[eta][prime], respectively, and have made comparisons to various theoretical predictions.
Meson Transition Form Factors and Electromagnetic Decays in the Dyson-Schwinger-approach
Author: Esther WeilMeson Transition Form Factors and Electromagnetic Decays in the Dyson-Schwinger-approach
Author: Esther Danielle WeilScalar Meson Effects in Radiative Decays of Vector Mesons
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Study of B Meson Decays with Excited Eta and Eta-prime Mesons
Author: Publisher:
ISBN:
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Languages : en
Pages : 7
Book Description
Using 383 million B{bar B} pairs from the BABAR data sample, they report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to K{bar K}* or [eta][pi][pi] final states with mass in the range (1.2-1.8) GeV/c2. They observe a significant enhancement at the low K{bar K}* invariant mass which is interpreted as B 2K, find evidence for the decay B+ 2K+, and place upper limits on the decays B+ 2K+, B+ 2!f1(1285)K+, B+ 2!f1(1420)K+, and B+ 2K+.