Download or read book Hypernuclear Spectroscopy in JLab s Hall A written by C. C. Chang and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from a new experiment (E94-107) in Hall A of the Thomas Jefferson National Accelerator Facility (JLab) producing Boron-12-lambda using electroproduction, (e, e{prime}K+). In the hypernuclear missing-mass spectrum the experiment achieves very good energy resolution (640 keV FWHM) by exploiting the characteristics of the High Resolution spectrometer pair and the exceptional beam quality available at JLab. The spectrometers were used with the addition an INFN provided pair of septum magnets to reach the desired small angles. Also, the Hall A standard complement of equipment was further augmented by the addition of a Ring Imaging Cherenkov detector (RICH) to achieve the best possible kaon identification.

Download or read book Hypernuclear Spectroscopy Program at JLab Hall C written by and published by . This book was released on 2008 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: DOI: http://dx.doi.org/10.1016/j.nuclphysa.2008.01.029 Hypernuclear production by the (e, e?K+) reaction has unique advantages in hypernuclear spectroscopy of the S=?1 regime. The second-generation spectroscopy experiment on 12C, 7Li and 28Si targets has been recently carried out at JLab Hall C with a new experimental configuration (Tilt method) and also using a new high-resolution kaon spectrometer (HKS). The experiment is described and preliminary results are presented together with the empasis of significance of the (e, e?K+) reaction for? hypernuclear spectroscopy and its future prospects.

Download or read book Hypernuclear Spectroscopy with Electron Beam at JLab Hall C written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypernuclear spectroscopy with electron beam at JLab Hall C has been studied since 2000. The first experiment, JLab E89-009, used Short Orbit Spectrometer (SOS) as a kaon arm and a split-pole type spectrometer (ENGE) as an electron arm. E89-009 employed zero-degree tagging method, which tags scattered electrons at zero-degree and the kaon arm also covered zero-degree. This method obtains maximum yield of hypernuclei but sufferers from high rate background of electrons from bremsstrahlung and positrons from pair-creation. Nevertheless, this experiment demonstrated the possibility of the (e, e' K) reaction for hypernuclear spectroscopy by obtaining a hypernuclear mass spectrum with an energy resolution of better than 1 MeV (FWHM) [1][2]. However, poor signal to noise ratio and poor statistics requires us to improve the experimental setup. Therefore, E01-011 experiment was proposed based on the success of the JLab E01-011 experiment. Improvements of E01-011 from E09-009 can be summarized as: 1. Employed newly constructed high resolution kaon spectrometer (HKS) as a kaon arm. 2. Employed so-called 'tilt-method' for the electron arm. With the newly constructed HKS, having 2-10-4 momentum resolution, we expect an energy resolution of 400 keV (FWHM). The 'tilt-method' means the electron arm is tilted vertically to the splitter dispersive plane to avoid background electrons from bremsstrahlung and moeller scattering. The setup allowed us to use up to a few tens beam. The experiment was performed in 2005 and final result will be shown shortly. The third experiment, JLab E05-115 experiment was proposed as a natural extension of E01-011 experiment and will be performed in 2009. Improvements of experimental setup are, 1. Employed newly constructed high resolution electron spectrometer (HES) as a electron arm, 2. Employed a new charge-separation magnet (Splitter), fully customized for hypernuclear experiment at Hall C. With the third generation experimental setup, we can study variety of targets up to medium-heavy ones such as 52Cr. This talk mainly focuses on the current status of the E05-115 experiment.

Download or read book Hypernuclear Spectroscopy Via e E K in JLab s Hall A written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from a new experiment (E94-107) in Hall A of the Thomas Jefferson National Accelerator Facility (JLab) producing {12/Lambda} B, {16/Lambda}N, and {9/Lambda}Li using electroproduction, (e, e'K+). In the hypernuclear missing-mass spectrum the experiment achieves very good energy resolution (670 keV FWHM) by exploiting the characteristics of the High Resolution spectrometer pair and the exceptional beam quality available at JLab. The spectrometers were used with the addition an INFN provided pair of septum magnets to reach the desired small angles. Also, the Hall A standard complement of equipment was further augmented by the addition of a Ring Imaging Cherenkov detector (RICH) to achieve the best possible kaon identification.

Download or read book The Second Generation Hypernuclear Spectroscopy at JLab Hall C E01 011 Experiment written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The second generation [Lambda] hypernuclear spectroscopy by (e, e'K) reaction has been carried out successfully at JLab in 2005. New configurations, HKS and Tilt method, significantly improved both energy resolution and statistics. Systematic error depend on tuning procedure was estimated by the blind analysis. Analysis is in the final stage. Third generation experiment (JLab E05-115) will be performed in the summer of 2009 w/ new e' spectrometer (HES).

Download or read book Experiments with the High Resolution Kaon Spectrometer at Jlab Hall C and the New Spectroscopy of 1 2 Lambda B Hypernuclei written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the pioneering experiment, E89-009 studying hypernuclear spectroscopy using the $(e, e{̂\prime}K+̂)$ reaction was completed, two additional experiments, E01-011 and E05-115, were performed at Jefferson Lab. These later experiments used a modified experimental design, the "Tilt Method", to dramatically suppress the large electromagnetic background, and allowed for a substantial increase in luminosity. Additionally, a new kaon spectrometer, HKS (E01-011), a new electron spectrometer, HES, and a new splitting magnet were added to produce precision, high-resolution hypernuclear spectroscopy. These two experiments, E01-011 and E05-115, resulted in two new data sets, producing sub-MeV energy resolution in the spectra of ${}{̂7}_{\Lambda}\text{He}$, ${}_̂{\Lambda}\text{B}$ and ${}{̂28}_{\Lambda} \text{Al}$ and ${}{̂7}_{\Lambda}\text{He}$, ${}_̂{\Lambda}\text{Be}$, ${}_̂{\Lambda}\text{B}$ and ${}{̂52}_{\Lambda}\text{V}$. All three experiments obtained a ${}_̂{\Lambda}\text{B}$, spectrum, which is the most characteristic $p$-shell hypernucleus and is commonly used for calibration. Independent analyses of these different experiments demonstrate excellent consistency and provide the clearest level structure to date of this hypernucleus as produced by the $(e, e{̂\prime}K+̂)$ reaction. This paper presents details of these experiments, and the extraction and analysis of the observed ${}_̂{\Lambda}\text{B}$ spectrum.

Download or read book First Experiment on Spectroscopy of Lambda Hypernuclei by Electroproduction at Jlab written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first experiment in Lambda-hypernuclear spectroscopy using the high precision electron beam at Jefferson laboratory (Jlab) has been carried out. The hypernuclear spectrometer system (HNSS) was used to measure spectra from the 12C(e, e(prime)K)12{sub {Lambda}}B reaction with sub-1 MeV resolution, the best energy resolution obtained thus far in hypernuclear spectroscopy with magnetic spectrometers. This paper describes the HNSS and the preliminary results for the 12{sub {Lambda}}B system. The experimental spectrum is consistent with the expected strong spin-flip excitations of unnatural parity states. A program of hypernuclear physics experiments is planned for the future with much higher yield and even better energy resolution.

Download or read book Proceedings of The IX International Conference on Hypernuclear and Strange Particle Physics written by Josef Pochodzalla and published by Springer Science & Business Media. This book was released on 2008-06-27 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the IX International Conference on Hypernuclear and Strange Particle Physics (HYP 2006). This conference series is devoted to the progress of our knowledge about strangeness flavor in hadron and nuclear physics. Besides the traditional topics such as hadron structure, hypernuclear spectroscopy and weak decay of hypernuclei, a particular focus of this conference was on the properties of strange mesons and their binding in nuclear systems.

Download or read book Hypernuclear Spectroscopy with the e E prime K Reaction written by Yu Fujii and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental conditions of the (e, e'K+) reaction for hypernuclear spectroscopy at Jefferson Lab Hall C are considered. Then two hypernuclear experiments at Hall C, Jlab E89-009 and E01-011 are introduced and compared, and possibility to extract information on hypernuclear states are discussed by referring expected spectra obtained with a DWIA calculation.

Download or read book Proceedings of the Sendai International Symposium written by Kazushige Maeda and published by World Scientific. This book was released on 2010 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importance of strange quarks in hadrons, nuclei and dense matter / A.W. Thomas -- Overview of strangeness nuclear physics / A. Gal -- Experimental overview and challenge in strangeness nuclear physics / K. Imai -- Recent QCD results on the strange hadron systems / M. Oka -- Strangeness physics with CLAS / V.D. Burkert -- Progress and issues in the electromagnetic production of kaon on the nucleon / T. Mart -- Neutral kaon photoproduction at LNS, Tohoku University / M. Kaneta et al. for the NKS/NKS2 collaboration -- Photoproduction of the [symbol] resonance from the neutron / K.H. Hicks and D. Keller for the LEPS collaboration -- Photo- and electroproduction of kaons / P. Bydz̮ouský -- Strangeness pproduction at ELSA / V. Kleber for the CBELSA/TAB collaboration -- Low Q[symbol] kaon electroproduction / P. Markowitz and A. Acha for the JLab E94-107 and Hall A collaborations -- Results on strangeness production from HADES / A. Schmah for the HADES collaboration -- [symbol] photo-production on the deuteron at LNS, Tohoku University / T. Ishikawa -- Current status of the GO parity violation experiment carried out at Jefferson Laboratory / L. Bimbot for the GO collaboration -- Production and searches for cascade baryons with CLAS / E.S. Smith for the CLAS collaboration -- Nijmegen Baryon-Baryon interactions S = -1,-2 systems / Th. A. Rijken, M.M. Nagels and Y. Yamamoto -- Hyperon-nucleus systems in G-matrix approach / Y. Yamamoto -- [symbol]C(O[symbol]) and [symbol]O potentials derived from the SU[symbol] quark-model Baryon-Baryon interaction / Y. Fujiwara, M. Kohno and Y. Suzuki

Download or read book Recent Results on High Resolution Hypernuclear Spectroscopy by Electroproduction at Jefferson Lab Hall A written by G. Chang and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first ''systematic'' study of 1 p shell hypernuclei with electromagnetic probes has started in Hall A at Jefferson Lab . The aim is to perform hypernuclear high resolution spectroscopy by the electroproduction of strangeness on four 1p-shell targets: 12C, 9Be, 16O, 7Li. The first part of the experiment on 12C and 9Be has been performed in 2004, the second part (16O and 7Li) is scheduled for June 2005. To overcome the major experimental difficulties, namely the low counting rate and the challenging Particle IDentification (PID), two septum magnets and a Ring Imaging CHerenkov (RICH) detector had to be added to the existing apparatus. After underlining the particular role the electroproduction reaction plays in hypernuclear physics we describe the challenging modifications of the Hall A apparatus. Preliminary results on 12C and 9Be are presented.

Download or read book Electron Induced Hypernuclear Spectroscopy Results in Hall A at Jefferson Lab written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of the Jefferson LAB electron beam, together with those of the experimental equipments, offer a unique opportunity to study hypernuclear spectroscopy via electromagnetic induced reactions. Results are presented on 12C, 16O and 9Be targets. In the hypernuclear missing-mass spectrum the experiment achieves sub-MeV energy resolution by exploiting the characteristics of the High Resolution Spectrometer pair and the beam quality available at JLab. These studies have provided, among other things, the first quantitative information on core-excited states in hypernuclei, as well as the precise determination of Lambda binding energy in the Lambda16N hypernucleus. For the experiment on oxygen, a waterfall target has been employed, allowing simultaneous measurement of the elementary reaction on protons: a crucial measurement to disentangle the contribution of the elementary reaction from the measured hypernuclear production cross section, yielding direct access to the nucleus-hypernucleus transition structure.

Download or read book Strangeness and Spin in Fundamental Physics written by Mauro Anselmino and published by IOS Press. This book was released on 2008 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents discussion of the role played by two subtle and somehow puzzling quantum numbers, the strangeness and the spin, in fundamental physics.

Download or read book High Resolution Hypernuclear Spectroscopy at Jefferson Lab Hall A written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of the Jefferson Lab electron beam, together with those of the experimental equipment, offer a unique opportunity to study hypernuclear spectroscopy via electromagnetic induced reactions. Experiment 94-107 started a systematic study on 1p-shell targets, $Ĉ$, ${̂9}Be$ and $Ô$. For $Ĉ$ for the first time measurable strength in the core-excited part of the spectrum between the ground state and the p state was shown in $_̂{\Lambda}B$ spectrum. A high-quality $_̂{\Lambda}N$ spectrum was produced for the first time with sub-MeV energy resolution. A very precise $\Lambda$ binding energy value for $_̂{\Lambda}N$, calibrated against the elementary $(e, e'K+̂)$ reaction on hydrogen, has also been obtained. ${̂9}_{\Lambda}Li$ spectrum shows some disagreement in strength for the second and third doublet with respect to the theory.

Download or read book Spectroscopic Study of Light Lambda Hypernuclei Via the e E K Reaction written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypernuclear production through the (e, e'K+) reaction makes it possible to realize sub-MeV high-resolution spectroscopy of  hypernuclei thanks to the availability of high quality primary beams. It is in contrast to the (K?, L?) and (L+, K+) reactions which use secondary beams of pions and kaons. Even though hypernuclear cross sections are much smaller than those from meson beams, the (e, e?K+) reaction has advantageous features for  hypernuclear production. A goal of the present study is to further explore and establish (e, e?K+) spectroscopy as a tool to investigate  hypernuclei, succeeding the pioneering experiment JLab E89-009, which was successfully carried out previously. A 1.8 GeV electron beam hit targets at the entrance of the splitter magnet in JLab?s Hall C.A positive kaon and a scattered electron were deflected by the splitter magnet to opposite directions and guided to the high resolution kaon spectrometer (HKS) and the scattered electron spectrometer (Enge), respecti.

Download or read book Proceedings of the 7th International Conference on Advanced Technology Particle Physics written by Maura Barone and published by World Scientific. This book was released on 2002 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features up-to-date technology applications to radiation detection. It synthesises several techniques of and approaches to radiation detection, covering a wide range of applications and addressing a large audience of experts and students. Many of the talks are in fact reviews of particular topics often not covered in standard books and other conferences, for instance, the medical physics section. To present these medical physics talks is crucial, since a large fraction of the community in medical physics are from the particle physics community. The same feature is true for astroparticle and space physics, which are relatively new fields. This book is unique in its scope. Except for IEEE, there is no other conference in the world that presents such a wide coverage of advanced technology applied to particle physics. However, unlike IEEE, more room is made in the book for reviews and general talks.

Download or read book A New Era of Nuclear Structure Physics written by Yasuyuki Suzuki and published by World Scientific. This book was released on 2004 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of invited talks, oral contributions and poster contributions devoted to advances in nuclear physics. It covers a broad range of topics on nuclear physics, including nuclear force, hypernuclei, nuclear structure, exotic nuclei, clustering, mean-field method, shell structure, nuclear deformation, unstable nuclei, and related topics. The proceedings have been selected for coverage in: . OCo Index to Scientific & Technical Proceedings- (ISTP- / ISI Proceedings). OCo Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings). OCo CC Proceedings OCo Engineering & Physical Sciences."