Observation of the Charmed Meson Decay D ̊yields Kp̄i+ Pi ̊
| Author | : Qiuming Jie |
| Publisher | : |
| Total Pages | : 130 |
| Release | : 1997 |
| Genre | : |
| ISBN | : |
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Results on Charmed Meson Decays from Mark III.
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1987 |
| Genre | : |
| ISBN | : |
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We report recent results on charmed meson decays, obtained using the Mark III detector at SPEAR. The first topic discussed is the observation of ee− .-->. D/sub s/D/sub s/* at .sqrt.s = 4.14 GeV. The D/sub s/* is detected as a peak in the mass distribution recoiling from D/sub s//sup + -/ .-->. phi.pi./sup + -/. The mass of the D/sub s/* is found to be (2109.3 +- 2.1 +- 3.1)MeV/c2, yielding a D/sub s/*-D/sub s/ mass difference of (137.9 +- 2.1 +- 4.3) MeV/c2. The production cross section times branching ratio is also measured. Next, a search for the decay D .-->. .mu.+nu/sub .mu./ is described. A preliminary upper limit (90% CL) on B(D+ .-->. .mu.+nu/sub .mu./) of 8.4 x 10−4 is obtained, corresponding to an upper limit on the decay constant f/sub D/ of 340 MeV/c2. Finally, we present results of a search for the lepton family number violating decay D° .-->. .mu.e. We find B(D° .-->. .mu.e)
Observation of B0 Meson Decays to A1(1260)+- Pi-
| Author | : B. Aubert |
| Publisher | : |
| Total Pages | : 7 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
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The authors present a measurement of the branching fraction of the decay B{sup 0} {yields} a{sub 1}{sup {+-}}(1260){pi}{sup {-+}} with a{sub 1}{sup {+-}}(1260) {yields} {pi}{sup {-+}}{pi}{sup {+-}}{pi}{sup {+-}}. The data sample corresponds to 218 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance. The authors measure the branching fraction {Beta}(B{sup 0} {yields} a{sub 1}{sup {+-}}(1260){pi}{sup {-+}}){Beta}(a{sub 1}{sup {+-}}(1260){yields} {pi}{sup {-+}}{pi}{sup {+-}}{pi}{sup {+-}})=(16.6 {+-} 1.9 {+-} 1.5) x 10{sup -6}, where the first error quoted is statistical and the second is systematic.
Nuclear Science Abstracts
| Author | : |
| Publisher | : |
| Total Pages | : 1288 |
| Release | : 1976 |
| Genre | : Nuclear energy |
| ISBN | : |
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Charmed Meson Production and Decay
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1977 |
| Genre | : |
| ISBN | : |
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Charmed meson production through two body processes in ee− annihilation is discussed. Evidence for states of charm excitation beyond the D* is obtained through an analysis of the recoil spectrum against D's produced at Ecm = 4.415 GeV. Direct observation of the reaction D* .-->. .pi.+D° in SPEAR data taken at Ecm exceeding 5 GeV is discussed. This reaction provides an extremely accurate determination of the D*+, D° mass difference (M/sub D*/sup +// -- M/sub D°/ = 145.3 +- 0.5 MeV/c2) and a new upper limit on D° -- anti D° mixing effects. The results of fits to the D°, D/sup +/ recoil spectrum are discussed. These fits provide considerable information on the masses, production mechanisms, and decays of charmed mesons. This is followed by a brief presentation of the known cross sections for charmed meson production and decay and an analysis of possible resonant structure in the decay products of the D° and D/sup +/. Lastly, a bubble chamber D° candidate submitted by Hagopian et al., of Florida State University is discussed.
Charmed Meson Reconstruction in the D*+ → D 0 (K- [pi]+) [pi]+ Decay Channel in P-p Collisions at √s
| Author | : |
| Publisher | : |
| Total Pages | : 128 |
| Release | : 2014 |
| Genre | : |
| ISBN | : |
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Reporting on the Lifetime of Charmless B/s Meson Decay to K+ K-
| Author | : M. Donega |
| Publisher | : |
| Total Pages | : 4 |
| Release | : 2005 |
| Genre | : |
| ISBN | : |
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The authors use data collected by the displaced track trigger of the CDF Run II detector at TeVatron to measure the B mesons lifetime in the hadronic decays: B{sub u} {yields} D{sup 0}{pi}, B{sub d} {yields} D{sup {-+}}{pi}{sup {+-}}, B{sub d} {yields} D{sup {-+}}3{pi}, B{sub s} {yields} D{sub s}{sup {-+}}{pi}{sup {+-}}, B{sub s} {yields} D{sub s}{sup {-+}}3{pi}. Recent developments in the measurement of the lifetime of the charmless B{sub s} {yields} K{sup +}k{sup -} mode is presented.
High Energy Physics Index
| Author | : |
| Publisher | : |
| Total Pages | : 708 |
| Release | : 1989 |
| Genre | : Nuclear physics |
| ISBN | : |
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Charmed Meson Reconstruction in the D*+ → D0(K-π+)π+ [D 0 (k - Pi +) Pi +] Decay Channel in P-p Collisions at √s
| Author | : Yifei Wang |
| Publisher | : |
| Total Pages | : 128 |
| Release | : 2014 |
| Genre | : |
| ISBN | : |
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Light Meson Physics from Charm Decays at Fermilab E791
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2002 |
| Genre | : |
| ISBN | : |
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We present recent results on light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Scalar mesons are found to have large contributions to the decays studied, D[sup+][yields][pi][sup+][pi][sup+] and D[sup+], D[sub s][sup+][yields][pi][sup -][pi][sup+][pi][sup+]. From the K[pi][pi] final state, we find good evidence for the existence of the light and broad k meson and we measure its mass and width. We also discuss recently published results on the 3[pi] final states, especially the measurement of the f[sub 0] parameters and the evidence for the[sigma] meson from D[sup+][yields][sigma][pi][sup+]. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.
