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Differential Cross Sections For Gamma Gamma To P Anti P In The Cm Energy Range From 20 To 31 Gev
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Book Synopsis Differential Cross Sections for Gamma Gamma to P Anti P in the C.M. Energy Range from 2.0 to 3.1 GeV. by : TASSO collaboration
Download or read book Differential Cross Sections for Gamma Gamma to P Anti P in the C.M. Energy Range from 2.0 to 3.1 GeV. written by TASSO collaboration and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Cross Sections for [gamma] [gamma] → P P - in the C.m. Energy Range from 2.0 to 3.1 GeV by :
Download or read book Differential Cross Sections for [gamma] [gamma] → P P - in the C.m. Energy Range from 2.0 to 3.1 GeV written by and published by . This book was released on 1983 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Cross Sections for Gamma + P --] K+̂ + Y for Lambda and Sigma0̂ Hyperons by :
Download or read book Differential Cross Sections for Gamma + P --] K+̂ + Y for Lambda and Sigma0̂ Hyperons written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-statistics cross sections for the reactions? + p → K +? and? + p → K+ +?° have been measured using CLAS at Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85
Book Synopsis Measurements of Yp[arrow Sign]pn Differential Cross Sections and [gamma][rho][arrow Sign][gamma][omega] Differential Cross Sections and Spin Density Matrix Elements [gamma]0, [gamma]3 Using CLAS at Jefferson Lab by : Tianqi Hu
Download or read book Measurements of Yp[arrow Sign]pn Differential Cross Sections and [gamma][rho][arrow Sign][gamma][omega] Differential Cross Sections and Spin Density Matrix Elements [gamma]0, [gamma]3 Using CLAS at Jefferson Lab written by Tianqi Hu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meson photoproduction off the nucleon has long been serving as a tool for understanding the properties of hadrons. At lower energy scales, the production mechanisms are dominated by the $s$-channel inelastic scattering process, where the proton absorbs the photon, gets excited to the resonance state, and then decays. Nucleon resonances have been extensively studied in this energy regime using techniques such as partial wave analysis. When the energy scale increases, the production mechanism gradually transitions from the formation of nucleon resonances to the pure scattering process, corresponding to the $t$- and $u$-channel exchange. However, the scarcity of cross section and polarization data over the photon energy range 3-6 GeV have thus far hindered our understanding of the mechanism transition from nucleon resonance to the $t$-channel Pomeron and Reggeon exchange. This work presents differential cross sections for the reaction $\\\\gamma p\\\\rightarrow p\\\\eta$ with energy-tagged photon energies between 1.2 and 4.7 GeV using the CLAS spectrometer at Jefferson Laboratory. The $\\\\eta$ meson is reconstructed in its dominant charged decay channel $\\\\eta\\\\rightarrow \\\\pi^{+}\\\\pi^{-}\\\\pi^{0}$. The energy scale extends from the nucleon resonance regime to the Regge regime, allowing for studying the $t$-channel exchange mechanisms. The d$\\\\sigma/$d$\\\\Omega$ differential cross sections are compared with predictions of $\\\\eta$-MAID 2018 and the latest solution of the Bonn-Gatchina coupled-channel analysis. In the energy regime $W>2.5$ GeV, the d$\\\\sigma/$d$t$ differential cross sections are presented in comparison with the Regge model from the Joint Physics Analysis Center. The data confirm the expected dominance of $\\\\rho$, $\\\\omega$ vector-meson exchange. Differential cross sections and spin density matrix elements (SDMEs) are also measured for the reaction $\\\\gamma p\\\\rightarrow p\\\\omega$ in the energy range $1.6E_{\\\\gamma}
Book Synopsis Differential Cross Sections for [the Gamma Plus Gamma Resulting in Proton Plus Antiproton Reaction] in the C.m. Energy Range from 2.0 to 3.1 GeV by : TASSO Collaboration
Download or read book Differential Cross Sections for [the Gamma Plus Gamma Resulting in Proton Plus Antiproton Reaction] in the C.m. Energy Range from 2.0 to 3.1 GeV written by TASSO Collaboration and published by . This book was released on 1983 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the Differential Cross Section for the Reaction $\gamma N \to \pi^{-} P$ from Deuterium by :
Download or read book A Measurement of the Differential Cross Section for the Reaction $\gamma N \to \pi^{-} P$ from Deuterium written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the differential cross section for the $\gamma n \to \pi^- p$ process from the CLAS detector at Jefferson Lab in Hall B for photon energies between 1.0 and 3.5 GeV and pion center-of-mass (c.m.) angles ($\theta_{c.m.}$) between 50$^\circ$ and 115$^\circ$. We confirm a previous indication of a broad enhancement around a c.m. energy ($\sqrt{s}$) of 2.2 GeV at $\theta_{c.m.}=90^\circ$ in the scaled differential cross section, $s^7 {\frac{d\sigma}{dt}}$. Our data show the angular dependence of this enhancement as the scaling region is approached in the kinematic region from 70$^\circ$ to 105$^\circ$.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Cross Sections and Spin Density Matrix Elements for the Reaction Gamma P -] P Omega by :
Download or read book Differential Cross Sections and Spin Density Matrix Elements for the Reaction Gamma P -] P Omega written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-statistics differential cross sections and spin density matrix elements for the reaction gamma p -> p omega have been measured using the CLAS at Jefferson Lab for center-of-mass (CM) energies from threshold up to 2.84 GeV. Results are reported in 112 10-MeV wide CM energy bins, each subdivided into cos(theta_CM) bins of width 0.1. These are the most precise and extensive omega photoproduction measurements to date. A number of prominent structures are clearly present in the data. Many of these have not previously been observed due to limited statistics in earlier measurements.
Book Synopsis Total Cross Sections of K± Mesons and Antiprotons on Nucleons Up to 3.3 GeV/c by :
Download or read book Total Cross Sections of K± Mesons and Antiprotons on Nucleons Up to 3.3 GeV/c written by and published by . This book was released on 1969 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Cross Sections for the Reactions [math Display by :
Download or read book Differential Cross Sections for the Reactions [math Display written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In high-statistics differential cross sections for the reactions [gamma] p -> p [eta] and [gamma] p -> p [eta]' the CLAS at Jefferson Lab was used to measure the center-of-mass energies from near threshold up to 2.84 GeV. The eta-prime results are the most precise to date and provide the largest energy and angular coverage. The eta measurements extend the energy range of the world's large-angle results by approximately 300 MeV. These new data, in particular the [eta]' measurements, are likely to help constrain the analyses being performed to search for new baryon resonance states.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Differential Cross Sections and Cx and Cz for Gamma Photon-proton Going to Kaon-lambda Baryon and Gamma Photon-proton Going to Kaon-sigma Baryon Using CLAS at Jefferson Lab by :
Download or read book Measurement of Differential Cross Sections and Cx and Cz for Gamma Photon-proton Going to Kaon-lambda Baryon and Gamma Photon-proton Going to Kaon-sigma Baryon Using CLAS at Jefferson Lab written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents several observables for the reactions [gamma] p → K+[Lambda] and [gamma] p → K+[Sigma]°. In addition to measuring differential cross sections, we have made first measurements of the double polarization observables Cx and Cz. Cx and C z characterize the transfer of polarization from the incident photon to the produced hyperons. Data were obtained at Jefferson Lab using a circularly polarized photon beam at endpoint energies of 2.4, 2.9, and 3.1 GeV. Events were detected with the CLAS spectrometer. In the [Lambda] channel, the cross sections support the recent observation of new resonant structure at W = 1900 MeV. Studies of the invariant cross section, dsdd show scaling behavior suggesting that the production mechanism becomes t-channel dominated near threshold at forward kaon angles. The double polarization observables show that the recoiling [Lambda] is almost maximally polarized along the direction of the incident photon from mid to forward kaon angles. While [Sigma]o differential cross sections are of the same magnitude as the [Lambda] differential cross sections, there is evidence of different physics dominating the production mechanism. The [Sigma]° invariant cross sections do not show the same t-scaling behavior present in the [Lambda] results. The double polarization observables indicate that the [Sigma]° is not polarized as strongly as the [Lambda]. They also fail to identify one preferred polarization axis. Complete interpretation of these results will rely on model calculations. Currently available isobar models obtain varying degrees of success while attempting to predict the double polarization observables. While the models are in better agreement with the differential cross sections, discrepancies with our cross sections indicate that they must be re-optimized in light of the new data. While the data suggest that a Regge model would provide a good description of K+[Lambda] over most of the range in W, the available Regge calculation overstates the strength of the cross section and does not predict Cx and Cz correctly.
Book Synopsis In-beam Measurements of Inclusive Differential Cross Sections for the Production of Gamma Radiation from 30-67.5 MeV Protons on Thin Targets of Aluminum, Iron, Titanium, and Uranium by : Guy Alton Letteer
Download or read book In-beam Measurements of Inclusive Differential Cross Sections for the Production of Gamma Radiation from 30-67.5 MeV Protons on Thin Targets of Aluminum, Iron, Titanium, and Uranium written by Guy Alton Letteer and published by . This book was released on 1988 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Cross Sections and Recoil Polarizations for the Reaction ?p{u2192}K+?0 by :
Download or read book Differential Cross Sections and Recoil Polarizations for the Reaction ?p{u2192}K+?0 written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, high-statistics measurements of differential cross sections and recoil polarizations for the reaction $\gamma p \rightarrow K+̂ \Sigma0̂$ have been obtained using the CLAS detector at Jefferson Lab. We cover center-of-mass energies ($\sqrt{s}$) from 1.69 to 2.84 GeV, with an extensive coverage in the $K+̂$ production angle. Independent measurements were made using the $K{̂+}p\pi{̂-}$($\gamma$) and $K{̂+}p$($\pi-̂,\gamma$) final-state topologies, and were found to exhibit good agreement. Our differential cross sections show good agreement with earlier CLAS, SAPHIR and LEPS results, while offering better statistical precision and a 300-MeV increase in $\sqrt{s}$ coverage. Above $\sqrt{s} \approx 2.5$ GeV, $t$- and $u$-channel Regge scaling behavior can be seen at forward- and backward-angles, respectively. Our recoil polarization ($P_\Sigma$) measurements represent a substantial increase in kinematic coverage and enhanced precision over previous world data. At forward angles we find that $P_\Sigma$ is of the same magnitude but opposite sign as $P_\Lambda$, in agreement with the static SU(6) quark model prediction of $P_\Sigma \approx -P_\Lambda$. This expectation is violated in some mid- and backward-angle kinematic regimes, where $P_\Sigma$ and $P_\Lambda$ are of similar magnitudes but also have the same signs. In conjunction with several other meson photoproduction results recently published by CLAS, the present data will help constrain the partial wave analyses being performed to search for missing baryon resonances.
Download or read book INIS Atomindex written by and published by . This book was released on 1983 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential cross section for n the c.m. energy range from 2.0 to 3.1. GeV by :
Download or read book Differential cross section for n the c.m. energy range from 2.0 to 3.1. GeV written by and published by . This book was released on 1983 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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![Download Differential Cross Sections for Gamma + P --] K+̂ + Y for Lambda and Sigma0̂ Hyperons PDF Online Free](https://books.google.com/books/content/images/frontcover/nzDmwQEACAAJ?fife=w200-h370)
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