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Showing 1 to 20 of 33 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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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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First measurement of the gluon polarisation in the nucleon using D mesons at COMPASS
… pair and <br>is then tagged by detecting the charmed mesons in the final state. <br>This approach is used in this thesis and results in a theoretically very clean sample of PGF events, assuming that the intrinsic charm content in the nucleon is negligible. <br>Since the charm tagging of the …
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