Author: Georgie Mbianda Njencheu
Publisher:
ISBN:
Category : Meson spectroscopy
Languages : en
Pages : 324
Book Description
Photoproduction and Radiative Decay of N Meson in CLAS at JLAB
Author: Georgie Mbianda Njencheu
Publisher:
ISBN:
Category : Meson spectroscopy
Languages : en
Pages : 324
Book Description
Publisher:
ISBN:
Category : Meson spectroscopy
Languages : en
Pages : 324
Book Description
Photoproduction and Decay of Light Mesons in CLAS.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
Book Description
We present preliminary experimental results on photoproduction and decay of light mesons measured with CLAS setup at JLAB . This include Dalitz decay of pseudoscalar and vector mesons, radiative decay of pseudoscalar mesons as well hadronic decays of pseudoscalar and vector mesons. The collected high statistics in some of decay channels exceeds the world data by an order of magnitude and some other decay modes are observed for the first time. It is shown how the CLAS data will improve the world data on transition form factors of light mesons, Dalitz plot analyses, branching ratios of rare decay modes and other fundamental properties potentially accessible through the light meson decays.
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
Book Description
We present preliminary experimental results on photoproduction and decay of light mesons measured with CLAS setup at JLAB . This include Dalitz decay of pseudoscalar and vector mesons, radiative decay of pseudoscalar mesons as well hadronic decays of pseudoscalar and vector mesons. The collected high statistics in some of decay channels exceeds the world data by an order of magnitude and some other decay modes are observed for the first time. It is shown how the CLAS data will improve the world data on transition form factors of light mesons, Dalitz plot analyses, branching ratios of rare decay modes and other fundamental properties potentially accessible through the light meson decays.
Meson Photoproduction (CLAS).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This is a brief and selective discussion of meson photoproduction measurements with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Meson photo- production is being used as a tool for various investigations, including the spectroscopy of baryons and mesons and the search for vector-meson medium modifications.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This is a brief and selective discussion of meson photoproduction measurements with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Meson photo- production is being used as a tool for various investigations, including the spectroscopy of baryons and mesons and the search for vector-meson medium modifications.
Photoproduction of the [math][mrow][msub][mi]f[/mi][mn]1[/mn][/msub][mrow][mo]([/mo][mn]1285[/mn][mo][/mo][/mrow][/mrow][/math] Meson
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The \fx\ meson with mass $1281.0 \pm 0.8$~MeV/$c^2$ and width $18.4 \pm 1.4$~MeV (FWHM) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the $\eta\pi^{+}\pi^{-}$, $K^+\bar{K}^0\pi^-$, and $K^-K^0\pi^+$ decay channels from threshold up to a center-of-mass energy of 2.8~GeV. The mass, width, and an amplitude analysis of the $\eta\pi^{+}\pi^{-}$ final-state Dalitz distribution are consistent with the axial-vector $J^P=1^+$ \fx\ identity, rather than the pseudoscalar $0^-$ \etax. The production mechanism is more consistent with $s$-channel decay of a high-mass $N^*$ state, and not with $t$-channel meson exchange. Decays to $\eta\pi\pi$ go dominantly via the intermediate $a_0^\pm(980)\pi^\mp$ states, with the branching ratio $\Gamma(a_0\pi \text{\small{ (no }} \bar{K} K\text{\small{)}}) / \Gamma(\eta\pi\pi \text{\small{ (all)}}) = 0.74\pm0.09$. The branching ratios $\Gamma(K \bar{K} \pi)/\Gamma(\eta\pi\pi) = 0.216\pm0.033$ and $\Gamma(\gamma\rho^0)/\Gamma(\eta\pi\pi) = 0.047\pm0.018$ were also obtained. The first is in agreement with previous data for the \fx, while the latter is lower than the world average.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The \fx\ meson with mass $1281.0 \pm 0.8$~MeV/$c^2$ and width $18.4 \pm 1.4$~MeV (FWHM) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the $\eta\pi^{+}\pi^{-}$, $K^+\bar{K}^0\pi^-$, and $K^-K^0\pi^+$ decay channels from threshold up to a center-of-mass energy of 2.8~GeV. The mass, width, and an amplitude analysis of the $\eta\pi^{+}\pi^{-}$ final-state Dalitz distribution are consistent with the axial-vector $J^P=1^+$ \fx\ identity, rather than the pseudoscalar $0^-$ \etax. The production mechanism is more consistent with $s$-channel decay of a high-mass $N^*$ state, and not with $t$-channel meson exchange. Decays to $\eta\pi\pi$ go dominantly via the intermediate $a_0^\pm(980)\pi^\mp$ states, with the branching ratio $\Gamma(a_0\pi \text{\small{ (no }} \bar{K} K\text{\small{)}}) / \Gamma(\eta\pi\pi \text{\small{ (all)}}) = 0.74\pm0.09$. The branching ratios $\Gamma(K \bar{K} \pi)/\Gamma(\eta\pi\pi) = 0.216\pm0.033$ and $\Gamma(\gamma\rho^0)/\Gamma(\eta\pi\pi) = 0.047\pm0.018$ were also obtained. The first is in agreement with previous data for the \fx, while the latter is lower than the world average.
Status of Meson Photoproduction Experiments with CLAS.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
Book Description
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Meson photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams in combination with longitudinally and transversely polarized frozen spin targets provide unique conditions for this type of experiments. For the first time, a complete or nearly complete measurement became possible and will allow model independent extraction of the reaction amplitude. The measurements were complete with both proton and deuteron targets. An overview of the collected experimental data will be presented.
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
Book Description
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Meson photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams in combination with longitudinally and transversely polarized frozen spin targets provide unique conditions for this type of experiments. For the first time, a complete or nearly complete measurement became possible and will allow model independent extraction of the reaction amplitude. The measurements were complete with both proton and deuteron targets. An overview of the collected experimental data will be presented.
G8b Experiment at JLab
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The experiments using polarized photos, at threshold energies, have been taken as relevant experiments because the physics behind them is expected to explain a bunch of problems into the hadronic physics. The nature of parity exchange at threshold energies, strangeness content of proton, violation of Okubo-Zweig-Iizuka observation (OZI rule), are examples of them. Photoproduction of vector mesons by using polarized photons gives a very important way to study those issues. Our goal will be measure the $\vec {\gamma} p \rightarrow \phi p $ reaction, with $\phi \rightarrow K^{+}K^{-} $, in the photon energy range of 1.7GeV to 2.1 GeV by using a Coherent Linear Polarized Photon Beam in Hall-B at Thomas Jefferson Laboratory (Newport News, VA). The experiment where data were taken was called "g8b."
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The experiments using polarized photos, at threshold energies, have been taken as relevant experiments because the physics behind them is expected to explain a bunch of problems into the hadronic physics. The nature of parity exchange at threshold energies, strangeness content of proton, violation of Okubo-Zweig-Iizuka observation (OZI rule), are examples of them. Photoproduction of vector mesons by using polarized photons gives a very important way to study those issues. Our goal will be measure the $\vec {\gamma} p \rightarrow \phi p $ reaction, with $\phi \rightarrow K^{+}K^{-} $, in the photon energy range of 1.7GeV to 2.1 GeV by using a Coherent Linear Polarized Photon Beam in Hall-B at Thomas Jefferson Laboratory (Newport News, VA). The experiment where data were taken was called "g8b."
CLAS+FROST
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams provide unique conditions for this type of experiments. Recent addition of the Frozen Spin Target (FROST) gives a remarkable opportunity to measure double and triple polarization observables for different pseudo-scalar meson photoproduction processes. For the first time, a complete or nearly complete experiment becomes possible and will allow model independent extraction of the reaction amplitude. An overview of the experiment and its current status is presented.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams provide unique conditions for this type of experiments. Recent addition of the Frozen Spin Target (FROST) gives a remarkable opportunity to measure double and triple polarization observables for different pseudo-scalar meson photoproduction processes. For the first time, a complete or nearly complete experiment becomes possible and will allow model independent extraction of the reaction amplitude. An overview of the experiment and its current status is presented.
VII Latin American Symposium on Nuclear Physics and Applications
Author: Ricardo Alarcon
Publisher: American Inst. of Physics
ISBN: 9780735404618
Category : Science
Languages : en
Pages : 538
Book Description
These proceedings aim to show the vitality and significance of nuclear science. The focus is the promotion of Nuclear Physics and its applications among Latin American laboratories and the international community. This Volume covers six main topics: Applications of Nuclear Physics, QCD in Nuclear Physics, Fundamental Symmetries and Neutrinos, Nuclear Structure and Reactions, Nuclear and Particle Astrophysics, and Facilities and Instrumentation.
Publisher: American Inst. of Physics
ISBN: 9780735404618
Category : Science
Languages : en
Pages : 538
Book Description
These proceedings aim to show the vitality and significance of nuclear science. The focus is the promotion of Nuclear Physics and its applications among Latin American laboratories and the international community. This Volume covers six main topics: Applications of Nuclear Physics, QCD in Nuclear Physics, Fundamental Symmetries and Neutrinos, Nuclear Structure and Reactions, Nuclear and Particle Astrophysics, and Facilities and Instrumentation.
Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference
Author: Feng-kun Guo
Publisher: World Scientific
ISBN: 981121932X
Category : Science
Languages : en
Pages : 800
Book Description
This is the conference proceedings for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019), held in Guilin, China. It is among the most important conference series in the field of hadron spectroscopy and structure. Collecting more than 130 contributions from this conference, the book spans over the topics of meson and baryon spectroscopy, exotic hadrons, hadron production and interactions, analysis tools, QCD and hadron structure, hadrons in nuclear environment and hypernuclei. Summaries of the recent discoveries from Belle, BESIII, LHCb and other high-energy experiments, as well as recent theoretical developments in the above mentioned topics, are contained in this volume, rendering it as a valuable resource for researchers working on hadron spectroscopy and structure.
Publisher: World Scientific
ISBN: 981121932X
Category : Science
Languages : en
Pages : 800
Book Description
This is the conference proceedings for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019), held in Guilin, China. It is among the most important conference series in the field of hadron spectroscopy and structure. Collecting more than 130 contributions from this conference, the book spans over the topics of meson and baryon spectroscopy, exotic hadrons, hadron production and interactions, analysis tools, QCD and hadron structure, hadrons in nuclear environment and hypernuclei. Summaries of the recent discoveries from Belle, BESIII, LHCb and other high-energy experiments, as well as recent theoretical developments in the above mentioned topics, are contained in this volume, rendering it as a valuable resource for researchers working on hadron spectroscopy and structure.
The Anomalous Magnetic Moment of the Muon
Author: Fred Jegerlehner
Publisher: Springer Science & Business Media
ISBN: 3540726330
Category : Science
Languages : en
Pages : 433
Book Description
This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. The muon anomalous magnetic moment is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations.
Publisher: Springer Science & Business Media
ISBN: 3540726330
Category : Science
Languages : en
Pages : 433
Book Description
This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. The muon anomalous magnetic moment is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations.