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Showing 1 to 20 of 34 for “"charmed"”.
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Photoproduction of charmed baryons
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T17:20:35Z No. of bitstreams: 1 1980_russell.pdf: 3561298 bytes, checksum: 8ff071f16f371aac8d1dcdd76e01dca0 (MD5)
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Charmonium and Charmed Mesons With Improved Lattice QCD
… calculations of the properties of charmonium and charmed mesons with lattice QCD. The calculations use improved actions and 2+1 flavors of dynamical quarks. After a review of the relevant phenomenology, I provide an introduction to lattice techniques including the specific actions used in this …
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Search for semileptonic decays of photoproduced charmed mesons
… at Fermi1ab, a search for photoproduction of charmed D mesons has been done using photons of 100 to 300 GeV. The reaction considered was [equation] s No statistically significant evidence for D production is observed based on the Ksnpi± mass spectrum. The sensitivity of the search is …
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Search for doubly-charmed baryons in CDF data
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Doubly charmed B decays with the LHCb experiment
… two studies of $CP$ violation with doubly charmed $B$ decays. Both were performed using Run I data collected by the LHCb experiment in $pp$ collisions at the LHC. This corresponds to 1.0 fb$^{-1}$ collected at a centre-of-mass energy of 7 TeV and 2.0 fb$^{-1}$ collected at a centre-of-mass …
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Hadroproduction of Charmed Baryon Lambda ---> Proton, Kaon, Pion
Production of the charmed baryon $\Lambda\sb{\rm c}$ has been observed in n-nucleus collisions at the Proton East area of FNAL. A 5$\sigma$ peak was seen in the decay mode $\Lambda\sbsp{\rm c}{+}$ $\to$ pK$\sp-\pi\sp+$ (and charge congugate). The lifetime was determined to be consistent with the …
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Direct measurement of the decays of charmed D mesons
Charmed D mesons produced in the decay of the t/1(3770) are observed by the Mark III detector at SPEAR. A new technique is applied to these data to derive D branching fractions which do not rely on the measurement of D production cross sections. Measurements are presented for three decay modes of …
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Mixing and Doubly Cabibbo -Suppressed Decays of Neutral Charmed Mesons
"A study of the decay D0 → K+pi-pi+pi - is presented. This ""wrong-sign"" decay can proceed through either a doubly Cabibbo-suppressed decay or mixing to a D¯0 followed by the Cabibbo-favored (or ""right-sign"") decay D0 → K-pi+pi-pi +. The Cabibbo-favored decay is used as a …
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Mixing and Doubly Cabibbo-Supressed Decays of Neutral Charmed Mesons
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-05-31T22:46:27Z No. of bitstreams: 1 2001_marsh.pdf: 4444986 bytes, checksum: 94138fb3ede0dde0547e0b216c978d22 (MD5)
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Resolution Studies for the Micro Vertex Detector of the PANDA Experiment and the Reconstruction of Charmed Mesons for Specific Hadronic Channels
… can contribute to understand the binding of charmed mesonic systems. Charmonium states can decay to open-charm channels which provide a clear signature in the detector from the charged D-Meson decays. In this work the high selection ability of the experimental setup was investigated for two …
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Beauty meson to double open charm decays with the LHCb detector
… ratios between the branching fractions of doubly charmed decays of the $B^-$ meson are measured for the first time. These results will help to constrain physics beyond the Standard Model. Finally, a generic beauty hadron neural network and exclusive selections for doubly charmed beauty meson …
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Studies of the Photoproduction of Charm-Anticharm Resonances in Ultra-Peripheral Collisions of Lead Ions in ALICE at the LHC
… case studies the two-photon production of an all charmed tetraquark state decaying into a four lepton final state.|The simulations for the first case predict a total of about one hundred candidates in a data sample with an integrated luminosity of 1 nb^- 1. The preliminary studies for the all …
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Untersuchung zur Rekonstruktion von D*+- -Mesonen in Photoproduktion am H1-Detektor bei HERA
… collisions at the HERA collider ring of DESY charmed particles, especially charged excited D-mesons, are produced via the process of boson gluon fusion, their decay particles being detected in the H1 detector. In this thesis the cross section for the production of these charmed mesons is …
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Search For The Decay Ds To Omega L Nu
… searches for a new type of rare decay of the charmed mesons,</p> <p>which would provide direct evidence for the presence of Fock states inside</p> <p>hadrons.</p> <p>We use 586pb of e+e- collisions at the Cornell Electron Storage</p> <p>Ring (CESR), at \sqrt{s}=4.17 GeV, recorded with the …
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Hadroproduction of Lamda c̳ [arrow] pK[pi]
"Production of the charmed baryon Ac has been observed in n-nucleus collisions at the Proton East area of FNAL. A 50' peak was seen in the decay mode At -+ pK-7r+ (and charge congugate). The lifetime was determined to be consistent with the current world average of 0.23 ps, and the cross section …
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Production of Neutral D (1863) Mesons in 217 Gev/c Negative Pion Proton Interactions
… perform a search for the hadronic production of charmed D mesons. A 217 Gev (pi)('-) beam was incident on a liquid hydrogen target. The trigger required a slow recoil proton in coincidence with a muon. A total of 26 (+OR-) 8 neutral D mesons were observed through their KO(pi)('+)(pi)('-) decay …
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Observations of new cabibbo suppressed decays of the D meson
"We have searched for new decay modes of the charmed D meson using the Mark III detector at the SPEAR e+e-storage ring. Observations of four new decay modes are presented along with upper limits for three others We have measured a cross section times branching ratio of .035 +-.008 +-.004 nb for the …
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Study of D-star mesons produced in electron positron annihilations at 4.14 GeV center of mass energy
Charmed D* mesons produced in e+e-annihilations at a center of mass energy of 4.14 GeV are observed by the Mark III detector at SPEAR. The recoil mass spectrum of the D mesons is used to extract the branching fractions of the charged and neutral D*. Measurements are presented for the two decay …
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"Myn owene woman, wel at ese" : feminist facts in the fiction of Mary McCarthy
… of fiction--The Company She Keeps (1942), A Charmed Life (1955), and The Group (1963)--in terms of the author's attitude towards femaleness. It confronts Elizabeth Janeway's assessment in Harvard Guide to Contemporary American Writing (1979) that McCarthy's works need not be reviewed in a …
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A measurement of the relative decay rate of the charm quark into leptons
The inclusive rate of leptons produced from charmed particle decays (from Z -> charm anticharm) has been measured using a data sample of four million hgadronic Z decays recorded by the ALEPH experiment at LEP from 1991 to 1995. The analysis uses a double-tag and is self-calibrating, i.e. it makes …
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