Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
First Observation Of An Excited Charm Baryon Decaying To Omega Charm Baryon At The Babar Experiment
Download First Observation Of An Excited Charm Baryon Decaying To Omega Charm Baryon At The Babar Experiment full books in PDF, epub, and Kindle. Read online First Observation Of An Excited Charm Baryon Decaying To Omega Charm Baryon At The Babar Experiment ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis First Observation of An Excited Charm Baryon Decaying to Omega Charm Baryon at the BaBar Experiment by :
Download or read book First Observation of An Excited Charm Baryon Decaying to Omega Charm Baryon at the BaBar Experiment written by and published by . This book was released on 2006 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have carried out a search for a charmed baryon [Omega]$*\atop{c}$ decaying to [Omega]$0\atop{c}$ and a [gamma] where [Omega] c candidates are reconstructed using decay modes [Omega]-[pi]+(c1), [Omega]-[pi]+[pi]0(c2), [Omega]-[pi]+[pi]-[pi]+(c3) and [Xi]-K-[pi]+[pi]+(c4). This search is performed by analyzing integrated luminosity of 230.7 fb-1 data collected by the BABAR detector at the Stanford Linear Accelerator Center. In decay channel [Omega]$*\atop{c}$ → [Omega]$0\atop{c}$([Omega]-[pi]+)[gamma] (C1), we observe a signal yield of 39.2$+9.8\atop{-9.1}$ (stat)±6.0(syst) events with a significance of 4.2 standard deviations. In decay channels [Omega]$*\atop{c}$ → [Omega]$0\atop{c}$([Omega]-[pi]+[pi]0)[gamma] (C2) and [Omega]$*\atop{c}$ →} [Omega]$0\atop{c}$([Xi]-K-[pi]+[pi]+)[gamma] (C4), we observe signal yields of 55.2$+16.1\atop{-15.2}$ ± 5.6 and 20.2$+9.3\atop{-8.5}$ ± 3.1 with significances of 3.4 and 2.0 [sigma], respectively. As for the [Omega]$*\atop{c}$ → [Omega]$0\atop{c}$([Omega]-[pi]+[pi]-[pi]+)[gamma] (C3) decay channel, we observe signal yields of -5.1$+5.3.8\atop{-4.7}$±1.0 without a positive significance. We assume the same production mechanism for the four decay channels of [Omega]$*\atop{c}$ studied. By combining these four channels, the fit results in a signal yield of 105.3$+21.2\atop{-20.5}$± 6.0 events with a significance of 5.2 [sigma]. We report the mass difference [Omega]$*\atop{c}$ - [Omega]$0\atop{c}$([delta]m) of the singly charmed baryon [Omega]$*\atop{c}$ to be 70.8$+1.0\atop{-1.0}$±1.1 MeV. Finally, the ratios of production cross sections are calculated: [sigma](e+e-→C1)/[sigma](e+e-→c1) = 0.71$+0.19\atop{-0.18}$±0.11, [sigma](e+e-→C2)/[sigma](e+e-→c2) = 1.76$+0.71\atop{-0.69}$±0.19, [sigma](e+e-→C3)/[sigma](e+e-→c3) = -0.66$+0.74\atop{-0.66}$±0.13, [sigma](e+e-→C4)/[sigma](e+e-→c4) = 1.70{sup +1.0}{sub -1.0}±0.27 and [sigma](e+e-→[Omega]$*\atop{c}$ (combined))/[sigma](e+e-→[Omega]$0\atop{c}$) = 1.0$+0.23\atop{-0.22}$±0.11.
Book Synopsis Observation of an Excited Charm Baryon Omega^*_C Decaying to Omega^0_C Gamma by : B. Aubert
Download or read book Observation of an Excited Charm Baryon Omega^*_C Decaying to Omega^0_C Gamma written by B. Aubert and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report the first observation of an excited singly-charmed baryon {Omega}*{sub c} (css) in the radiative decay {Omega}{sub c}{sup 0}{gamma}, where the {Omega}{sub c}{sup 0} baryon is reconstructed in the decays to the final states {Omega}{sup -}{pi}{sup +}, {Omega}{sup -} {pi}{sup +}{pi}{sup 0}, {Omega}{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +}, and {Xi}{sup -} K{sup -} {pi}{sup +}{pi}{sup +}. This analysis is performed using a dataset of 230.7 fb{sup -1} collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The mass difference between the {Omega}*{sub c} and the {Omega}{sub c}{sup 0} baryons is measured to be 70.8 {+-} 1.0(stat) {+-} 1.1(syst) MeV/c{sup 2}. They also measure the ratio of inclusive production cross sections of {Omega}*{sub c} and {Omega}{sub c}{sup 0} in e{sup +}e{sup -} annihilation.
Book Synopsis First Observation of an Exited Charm Baryon [omega] [suprascript]* [subscript]c Decaying to [omega] [suprascript]0 [subscript]c Y at the BABAR Experiment by : Rahmi Bula
Download or read book First Observation of an Exited Charm Baryon [omega] [suprascript]* [subscript]c Decaying to [omega] [suprascript]0 [subscript]c Y at the BABAR Experiment written by Rahmi Bula and published by . This book was released on 2006 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Charm Baryons with the BaBar Experiment by : Brian Aa Petersen
Download or read book Study of Charm Baryons with the BaBar Experiment written by Brian Aa Petersen and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on several studies of charm baryon production and decays by the BABAR collaboration. They confirm previous observations of the {Xi}'{sub c}{sup 0/+}, {Xi}{sub c}(2980){sup +} and {Xi}{sub c}(3077){sup +} baryons, measure branching ratios for Cabibbo-suppressed {Lambda}{sub c}{sup +} decays and use baryon decays to study the properties of the light-quark baryons, {Omega}{sup -} and {Xi}(1690){sup 0}.
Book Synopsis Charm Baryon Studies at BaBar by : V. Ziegler
Download or read book Charm Baryon Studies at BaBar written by V. Ziegler and published by . This book was released on 2006 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a precision measurement of the mass of the {Lambda}{sub c}{sup +} and studies of the production and decay of the {Omega}{sub c}{sup 0} and {Xi}{sub c}{sup 0} charm baryons using data collected by the BABAR experiment. To keep the systematic uncertainty as low as possible, the {Lambda}{sub c}{sup +} mass measurement is performed using the low Q-value decays, {Lambda}{sub c}{sup +} {yields} {Lambda}{sup 0} K{sub S}{sup 0}K{sup +} and {Lambda}{sub c}{sup +} {yields} {Sigma}{sup 0} K{sub S}{sup 0}K{sup +}. Several hadronic final states involving an {Omega}{sup -} and a {Xi}{sup -} hyperon are analyzed to reconstruct the {Xi}{sub c}{sup 0} and the {Omega}{sub c}{sup 0}.
Book Synopsis A Study of Double-Charm and Charm-Strange Baryons InElectron-Positron Annihilations by :
Download or read book A Study of Double-Charm and Charm-Strange Baryons InElectron-Positron Annihilations written by and published by . This book was released on 2007 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation I describe a study of double-charm and charm-strange baryons based on data collected with the BABAR Detector at the Stanford Linear Accelerator Center. In this study I search for new baryons and make precise measurements of their properties and decay modes. I seek to verify and expand upon double-charm and charm-strange baryon observations made by other experiments. The BABAR Detector is used to measure subatomic particles that are produced at the PEP-II storage rings. I analyze approximately 300 million e+e- → c{bar c} events in a search for the production of double-charm baryons. I search for the double-charm baryons?{sub cc} (containing the quarks ccd) and?{sup ++}{sub cc} (ccu) in decays to?+{sub c}K−?+ and?+{sub c}K−?+?+, respectively. No statistically significant signals for their production are found, and upper limits on their production are determined. Statistically significant signals for excited charm-strange baryons are observed with my analysis of approximately 500 million e+e- → c{bar c} events. The charged charm-strange baryons?{sub c}(2970)+,?{sub c}(3055)+,?{sub c}(3123)+ are found in decays to?+{sub c}K−?+, the same decay mode used in the?+{sub cc} search. The neutral charm-strange baryon?{sub c}(3077)° is observed in decays to?+{sub c}K?−. I also search for excited charm-strange baryon decays to?+{sub c}K8,?+{sub c}K−,?+{sub c}K8?−?+, and?+{sub c}K−?−?+. No significant charm-strange baryon signals a f h these decay modes. For each excited charm-strange baryon state that I observe, I measure its mass, natural width (lifetime), and production rate. The properties of these excited charm-strange baryons and their decay modes provide constraints for phenomenological models of quark interactions through quantum chromodynamics. My discovery of the two new charm-strange baryons?{sub c}(3055)+ and?{sub c}(3123)+ influences our theoretical understanding of charm-strange baryon states.
Book Synopsis Charm Baryon Production and Decays in E687 by :
Download or read book Charm Baryon Production and Decays in E687 written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary analysis of Charm Baryons from the Fermilab high energy photoproduction experiment E687 is presented. The results include the first observation of?{sub c}°→?−?
Book Synopsis First Charm Baryon Physics from SELEX(E781). by :
Download or read book First Charm Baryon Physics from SELEX(E781). written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary results on various aspects of charm baryon studies at the 1996-1997 fixed target experiment of Fermilab studying charm produced from incident [Sigma][sup -], proton, and [pi][sub -] beams at 600 GeV. First results include the comparison of hadroproduction asymmetries for [Lambda][sub c][sup +] production from the 3 beams as well xF distributions and the first observation of the Cabbibo-suppressed decay [Xi][sub c][sup +] [yields] pK[sup -][pi][sup +]. The relative branching fraction of the Cabbibo-suppressed mode to the 3-body Cabbibo-favored modes is also presented.
Book Synopsis A Study of Double-charm and Charm-strange Baryons in Electron-positron Annihilations by : Adam Jacob Edwards
Download or read book A Study of Double-charm and Charm-strange Baryons in Electron-positron Annihilations written by Adam Jacob Edwards and published by . This book was released on 2007 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis First Observation of a Family of Double-charm Baryons by :
Download or read book First Observation of a Family of Double-charm Baryons written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The SELEX experiment (E781) at Fermilab has candidates for high mass states decaying to[Lambda][sub c][sup+]K[sup -][pi][sup+] and[Lambda][sub c][sup+]K[sup -] pi[sup+][pi][sup+], Cabibbo-allowed decay modes of doubly-charmed baryons[Xi][sub cc][sup+] and[Xi][sub cc][sup++]. The masses are consistent with theoretical considerations, but the spectroscopy is surprising. Limited lifetime information suggests that[tau][sub[Xi][sub cc][sup++]][approx][tau][sub Xi][sub cc][sup+].
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation of an Excited Charmed Baryon Decaying Into Xi(c)0 Pi by :
Download or read book Observation of an Excited Charmed Baryon Decaying Into Xi(c)0 Pi written by and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data recorded by the CLEO-II detector at CESR, they report the first observation of an excited charmed baryon decaying into [Xi]{sub c}°[pi]. The state has mass difference M([Xi]{sub c}°[pi]) = M([Xi]{sub c}°) of 174.3 ± 0.5 ± 1.0 MeV/c2, and a width of
Book Synopsis A Study of Excited Charm-Strange Baryons WithEvidence for New Baryons Xi_c(3055)+ and Xi_c(3123) by :
Download or read book A Study of Excited Charm-Strange Baryons WithEvidence for New Baryons Xi_c(3055)+ and Xi_c(3123) written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of excited charm-strange baryon states produced in ee− annihilations at or near a center-of-mass energy of 10.58 GeV, in a data sample with an integrated luminosity of 384 fb−1 recorded with the BABAR detector at the PEP-II e+e storage rings at the Stanford Linear Accelerator Center. We study strong decays of charm-strange baryons to?{sub c}+K{sub S}°,?{sub c}+K−,?{sub c}+K−?+,?{sub c}+K{sub S}°?−,?{sub c}+K{sub S}°?−?+,?{sub c}+K−?−?+. This study confirms the existence of the states?{sub c}(2980)+,?{sub c}(3077)+, and?{sub c}(3077)−, with a more accurate determination of the?{sub c}(2980)+ mass and width. We also present evidence for two new states,?{sub c}(3055)+ and?{sub c}(3123)+, decaying through the intermediate resonant modes?{sub c}(2455){sup ++}K− and?{sub c}(2520){sup ++}K−, respectively. For each of these baryons, we measure the yield in each final state, determine the statistical significance, and calculate the product of the production cross-section and branching fractions. We also measure the masses and widths of these excited charm-strange baryons.
Book Synopsis Searching for Double Charm Baryon Ξ [suprascript]+ [subscript]cc in the BABAR Experiment by : Jian Liu
Download or read book Searching for Double Charm Baryon Ξ [suprascript]+ [subscript]cc in the BABAR Experiment written by Jian Liu and published by . This book was released on 2007 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation of Charmed Strange [omega]0/c Baryon in E+e- Collisions and First Observation of Charmed Strange Baryons [xi]+'/c (c{s, U}) and [xi]0'/c (c{s, D}) by : Syed Basit Athar
Download or read book Observation of Charmed Strange [omega]0/c Baryon in E+e- Collisions and First Observation of Charmed Strange Baryons [xi]+'/c (c{s, U}) and [xi]0'/c (c{s, D}) written by Syed Basit Athar and published by . This book was released on 2001 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis First Observation of Doubly Charmed Baryons by :
Download or read book First Observation of Doubly Charmed Baryons written by and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SELEX experiment (E781) at Fermilab has observed two statistically compelling high mass states near 3.6 GeV/c2, decaying to?{sub c} K−?+ and?{sub c}+ K−?+?+. These final states are Cabibbo-allowed decay modes of doubly charmed baryons?{sub cc}+ and?{sub cc}{sup ++}, respectively. The masses are in the range expected from theoretical considerations, but the spectroscopy is surprising. SELEX also has weaker preliminary evidence for a state near 3.8 GeV/c2, a high mass state decaying to?{sub c}+ K−?+?+, possibly an excited?{sub cc}{sup ++} (ccu*). Data are presented and discussed.
Book Synopsis Observation of a Charmed Baryon Decaying to D0 P at a Mass Near 2.94 GeV/c2 by : B. Aubert
Download or read book Observation of a Charmed Baryon Decaying to D0 P at a Mass Near 2.94 GeV/c2 written by B. Aubert and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for charmed baryons decaying to D{sup 0}p reveals two states: the {Lambda}{sub c}(2880){sup +} baryon and a previously unobserved state at a mass of [2939.8 {+-} 1.3 (stat.) {+-} 1.0 (syst.)] MeV/c{sup 2} and with an intrinsic width of [17.5 {+-} 5.2 (stat.) {+-} 5.9 (syst.)] MeV. Consistent and significant signals are observed for the K{sup -}{pi}{sup +} and K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} decay modes of the D{sup 0} in 287 fb{sup -1} annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the D{sup +}p spectrum of doubly-charged partners. The mass and intrinsic width of the {Lambda}{sub c}(2880){sup +} baryon and relative yield of the two baryons are also measured.