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Semileptonic Decays Of Charged D Meson Going To Eta Lepton Neutrino With Generic Reconstruction Of Fully Hadronic Charged D Meson And Neutral D Meson Decays
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Book Synopsis Semileptonic Decays of Charged D Meson Going to Eta-lepton-neutrino with Generic Reconstruction of Fully Hadronic Charged D Meson and Neutral D Meson Decays by : Richard Carl Gray
Download or read book Semileptonic Decays of Charged D Meson Going to Eta-lepton-neutrino with Generic Reconstruction of Fully Hadronic Charged D Meson and Neutral D Meson Decays written by Richard Carl Gray and published by . This book was released on 2008 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the semileptonic decays D + & rarr; eta'e+nu and D+ & rarr; etae+nu using 818 pb-1 of e+ e- collisions recorded by the CLEO-c detector located at the Cornell Electron Storage Ring. We employ a technique that uses the detector hermeticity to reconstruct the neutrino as missing energy and momentum. We improve the neutrino resolution by developing a generic algorithm to reconstruct the non-signal D, and constrain systematic uncertainties in the efficiency by using the algorithm to measure the branching fractions of D+ and D0 hadronic decays. We observe and measure the branching fractions of 67 hadronic decays, 32 of which are not listed in the PDG 2008. We find B (D+ & rarr; eta'e +nu) = (2.16 +/- 0.53 +/- 0.05 +/- 0.05) x 10-4 and B (D+ & rarr; etae +nu) = (11.7 +/- 0.98 +/- 0.34 +/- 0.26) x 10-4. Among the 67 D hadronic branching fractions observed in this analysis, we discover the decay B (D+ & rarr; pi+etaeta) = (0.34 +/- 0.06 +/- 0.032)% which is unexpectedly large considering the limited phase space available to the decay.
Book Synopsis Semi-leptonic Charged D Meson Decays in 800 GeV P-emulsion Interactions by : Vittorio Paolone
Download or read book Semi-leptonic Charged D Meson Decays in 800 GeV P-emulsion Interactions written by Vittorio Paolone and published by . This book was released on 1990 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Leptonic Decays of the Charged B Meson by : Luke Andrew Corwin
Download or read book Leptonic Decays of the Charged B Meson written by Luke Andrew Corwin and published by . This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We present a search for the decay of the charged B meson into a charged lepton and a neutrino 458.9 million Upsilon(4S) decays recorded with the Babar detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semileptonic B decay is selected, and in the recoil a search for the signal decay is performed. The tau lepton is identified in decays to an electron and two neutrinos; a muon and two neutrinos; a charged pion and a neutrino; or a charged pion, a neutral pion, and a neutrino. The analysis strategy and the statistical procedure is set up for branching fraction extraction or upper limit determination. We determine from the data set a preliminary measurement of the branching fraction a charged B decaying to a tau lepton and a neutrino = (1.8 " 0.8 " 0.1)E-4, which excludes zero at 2.4 standard deviations. We extract the B meson decay constant = 255 " 58 MeV. Combination with the hadronically tagged measurement yields (1.8 " 0.6)E-4. We also set preliminary limits on the branching fraction of charged B decaying to an electron and a neutrino at 7.7E-6 and the charged B decaying to a muon and a neutrino at 11E-6. The limits are at the 90% confidence level.
Book Synopsis Semileptonic B Meson to D-star Meson Decay by : Mauricio Garcia-Sciveres
Download or read book Semileptonic B Meson to D-star Meson Decay written by Mauricio Garcia-Sciveres and published by . This book was released on 1994 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the Inclusive Branching Ratio of Charged and Neutral D Meson Decays Containing a Neutrino by : Michael Lawrence Weinberger
Download or read book A Measurement of the Inclusive Branching Ratio of Charged and Neutral D Meson Decays Containing a Neutrino written by Michael Lawrence Weinberger and published by . This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Semileptonic Decays of B Mesons and D Mesons by : Kenneth Arthur Bloom
Download or read book Analysis of Semileptonic Decays of B Mesons and D Mesons written by Kenneth Arthur Bloom and published by . This book was released on 1997 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semileptonic Decays D Exp(+) -> Eta Exp(') L Exp(+) V With Generic Reconstruction Of Fully Hadronic D Exp(+) And D Exp(0) Decays by : Richard Carl Gray
Download or read book Semileptonic Decays D Exp(+) -> Eta Exp(') L Exp(+) V With Generic Reconstruction Of Fully Hadronic D Exp(+) And D Exp(0) Decays written by Richard Carl Gray and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the semileptonic decays D+ [RIGHTWARDS ARROW] [eta] e+ [nu] and D+ [RIGHTWARDS ARROW] [eta]e+ [nu] using 818 pb[-]1 of e+ e[-] collisions recorded by the CLEO-c detector located at the Cornell Electron Storage Ring. We employ a technique that uses the detector hermeticity to reconstruct the neutrino as missing energy and momentum. We improve the neutrino resolution by developing a generic algorithm to reconstruct the non-signal D, and constrain systematic uncertainties in the efficiency by using the algorithm to measure the branching fractions of D+ and D0 hadronic decays. We observe and measure the branching fractions of 67 hadronic decays, 32 of which are not listed in the PDG 2008. We find B(D+ [RIGHTWARDS ARROW] [eta] e+ [nu]) = (2.16 ± 0.53 ± 0.05 ± 0.05) x 10[-]4 and B(D+ [RIGHTWARDS ARROW] [eta]e+ [nu]) = (11.7 ± 0.98 ± 0.34 ± 0.26) x 10[-]4 . Among the 67 D hadronic branching fractions observed in this analysis, we discover the decay B(D+ [RIGHTWARDS ARROW] [pi]+ [eta][eta]) = (0.34 ± 0.06 ± 0.032)% which is unexpectedly large considering the limited phase space available to the decay.
Book Synopsis Recent Results on D Meson Decays from the MARK III. by :
Download or read book Recent Results on D Meson Decays from the MARK III. written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MARK III Collaboration recently completed the analysis of a number of decay modes of charged and neutral D mesons produced in electron-positron collisions near the peak of the psi(3770) resonance at SLAC's SPEAR storage ring. The mesons were produced nearly at rest in pairs, either DD− or D° anti D°, at a center-of-mass energy below the threshold for DD production. The unique kinematics of the production allow us to isolate the charmed meson signal clearly and unambiguously. The data were collected with the MARK III Spectrometer, a large solid angle magnetic detector. Our data sample corresponds to an integrated luminosity of approximately 9.3 inverse picobarns. New results will be presented on the absolute branching ratios of D mesons into hadronic final states, branching ratios for three body decays via pseudoscalar-vector intermediate states, and branching ratios for Cabibbo allowed and Cabibbo suppressed decays. Inclusive and exclusive branching ratios for the semi-leptonic decays of D mesons will be presented, as well as the first measurement of the vector form factor in the decay D° .-->. K−e, nu, evidence for interference in D+ decays, and new information on the contributions of W exchange diagrams to D° decays.
Book Synopsis Hadronic Decays of the D/S Meson by : Steven R. Wasserbaech
Download or read book Hadronic Decays of the D/S Meson written by Steven R. Wasserbaech and published by . This book was released on 1989 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Neutral D Meson Mixing Using Semileptonic Decays by : Kevin T. Flood
Download or read book Search for Neutral D Meson Mixing Using Semileptonic Decays written by Kevin T. Flood and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a 87 fb{sup -1} dataset, a search for D{sup 0}-{bar D}{sup 0} mixing is made using the semileptonic decay modes D*{sup +} {yields} {pi}{sup +} D{sup 0}, D{sup 0} {yields} [K/K*]e{nu} (+c.c.) at the B-Factory facility at the Stanford Linear Accelerator Center. These modes offer unambiguous initial and final-state charm flavor tags, and allow the combined use of the D{sup 0} lifetime and D*{sup +}-D{sup 0} mass difference ({Delta}M) in a global likelihood fit. The high-statistics sample of reconstructed unmixed semileptonic D{sup 0} decays is used to model both the {Delta}M distribution and the time-dependence of mixed events directly from the data. Neural networks are used both to select events and to fully reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix}
Book Synopsis The Study of D Meson Leptonic Decays by : Jian Chen
Download or read book The Study of D Meson Leptonic Decays written by Jian Chen and published by . This book was released on 1996 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Leptonic Decays of Charged D and Ds Mesons by : Nabil Menaa
Download or read book Leptonic Decays of Charged D and Ds Mesons written by Nabil Menaa and published by . This book was released on 2007 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 281 pb--1 of data taken on the psi(3770) resonance and 314 pb--1 of data near or at 4170 MeV collected with the CLEO-c detector, we present two analyses to study the purely leptonic decays of charmed and charmed strange charged mesons.
Book Synopsis An Upper Limit on the Neutral B(S) Meson Decays to Charged D(S) Meson Pion Branching Ratio by : Michael C. Kirk
Download or read book An Upper Limit on the Neutral B(S) Meson Decays to Charged D(S) Meson Pion Branching Ratio written by Michael C. Kirk and published by . This book was released on 2003 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Exclusive Semileptonic B Meson Decays ToTau Leptons by :
Download or read book Study of Exclusive Semileptonic B Meson Decays ToTau Leptons written by and published by . This book was released on 2007 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for four exclusive semileptonic decays B → D{sup (*)}[tau]−{bar [nu]}{sub [tau]} in 209 fb−1 of data collected with the BABAR detector, corresponding to 232 million e+e- → [Upsilon](4S) → B{bar B} events. We select events with a D{sup (*)} meson and a light lepton (e or [mu]) recoiling against a fully-reconstructed B meson. We perform a fit to the lepton spectrum and missing mass squared to discriminate signal events from backgrounds, predominantly B → D{sup (*)}{tau}−{bar [nu]}{sub {tau}}. A control sample of identified D**l−{bar {nu}}{sub {ell}} events is included in the fit to estimate the background contribution from these decays. We measure [beta](B → D{sub {tau}{nu}}) = (0.86±0.24±0.11±0.06)% and [beta](B → D*{sub {tau}{nu}}) = (1.62±0.31±0.10±0.05)%, where the errors are statistical, systematic, and normalization-mode related, respectively, and where the results are expressed for the {bar B}° lifetime.
Download or read book Limits on Rare D-meson Decays written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest results from a number of experiments on searches for rare decays of the charmed D-mesons are summarized. This talk reports on upper limits on flavor changing weak neutral current reactions and on processes that do not conserve the lepton family number.
Book Synopsis D Meson Hadronic Decays at CLEO-c by :
Download or read book D Meson Hadronic Decays at CLEO-c written by and published by . This book was released on 2011 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent CLEO-c results on hadronic decays of D and D{sub s} mesons are presented. First the absolute branching fractions for D and D{sub s} mesons using a double tag technique are discussed, then are the Cabibbo suppressed decays and doubly Cabibbo suppressed decays. Finally, I present the inclusive and rare decay modes and other measurements from CLEO-c. These decays illuminate a wide range of physics. A brief theoretical introduction is given before the corresponding discussion on measurement.
Book Synopsis Rare and Forbidden Decays of D Mesons by :
Download or read book Rare and Forbidden Decays of D Mesons written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors summarize the results of two recent searches for flavor-changing neutral current, lepton-flavor violating, and lepton-number violating decays of D[sup+], D[sub s][sup+], and D[sup 0] mesons (and their antiparticles) into modes containing muons and electrons. using data from Fermilab charm hadroproduction experiment E791, they examined D[sup+] and D[sub s][sup+][pi][ell][ell] and[Kappa][ell][ell] decay modes and the D[sup 0] dilepton decay modes containing either[ell][sup+][ell][sup[minus]], a[rho][sup 0], [bar[Kappa]]*[sup 0], or[phi] vector meson, or a non-resonant[pi][pi], [Kappa][pi], or[Kappa][Kappa] pair of pseudoscalar mesons. No evidence for any of these decays was found. Therefore, the authors presented branching-fraction upper limits at 90% confidence level for the 51 decay modes examined. Twenty-six of these modes had no previously reported limits, and eighteen of the remainder were reported with significant improvements over previously published results.
