Search For Flavor Changing Neutral Current D Meson Decays PDF Download
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| Total Pages | : 7 |
| Release | : 2007 |
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Download Search for Flavor-changing-neutral-current D Meson Decays Book in PDF, ePub and Kindle
We study the flavor-changing-neutral-current process c → u??− using 1.3 fb−1 of p{bar p} collisions at √s = 1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We see clear indications of the D+{sub s} and D+ →??+ →?+?−?+ final states with significance greater than four standard deviations above background for the D+ state. We search for the continuum decay of D+ →?+?+?− in the dimuon invariant mass spectrum away from the? resonance. We see no evidence of signal above background and set a limit of B(D+ →?+?+?−)
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| Release | : 1987 |
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Download A Search for Flavour Changing Neutral Current Processes in Decays of Charmed Mesons Book in PDF, ePub and Kindle
Neutral current interactions are known from studies of K meson decays to conserve flavor to a high precision. Although flavor changing neutral currents (FCNC) are forbidden in the Weinberg-Salam model, many extensions of the Standard Model allow such processes. We present preliminary upper limits on FCNC-mediated decays of charmed particles, namely D° .-->. ee−, D° .-->. .mu.mu.−, D° .-->. .mu.e and D+ .-->. .pi.+.mu.e.
| Author | : Nicholas James Witchey |
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| Total Pages | : 326 |
| Release | : 1996 |
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Download Search for Flavor Changing Neutral Current Decays of Charm Mesons Book in PDF, ePub and Kindle
| Author | : Cline David B |
| Publisher | : World Scientific |
| Total Pages | : 396 |
| Release | : 1997-11-29 |
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| ISBN | : 9814545821 |
Download Flavor-changing Neutral Currents: Present And Future Studies: Proceedings Of The Symposium Book in PDF, ePub and Kindle
Partial differential equations form an essential part of the core mathematics syllabus for undergraduate scientists and engineers. The origins and applications of such equations occur in a variety of different fields, ranging from fluid dynamics, electromagnetism, heat conduction and diffusion, to quantum mechanics, wave propagation and general relativity.This volume introduces the important methods used in the solution of partial differential equations. Written primarily for second-year and final-year students taking physics and engineering courses, it will also be of value to mathematicians studying mathematical methods as part of their course. The text, which assumes only that the reader has followed a good basic first-year ancillary mathematics course, is self-contained and is an unabridged republication of the third edition published by Longman in 1985.
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| Release | : 2003 |
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Download Limits on Flavor Changing Neutral Currents in D0 Meson Decays Book in PDF, ePub and Kindle
Using the CLEO II detector at CESR, we have searched for flavor changing neutral currents and lepton family number violations in D[sup 0] meson decays. The upper limits on the branching fractions for D[sup 0][yields][ell][sup+][ell][sup -] and D[sup 0][yields] X[sup 0][ell][sup+][ell][sup -] are in the range 10[sup -5] to 10[sup -4], where X[sup 0] can be a[pi][sup 0], K[sub s][sup 0], [eta], [rho][sup 0], [omega], [bar K]*[sup 0], or[phi] meson, and the[ell][sup+][ell][sup -] pair can be e[sup+]e[sup -], [mu][sup+][mu][sup -], or e[sup[+-]][mu][sup[-+]]. Although these limits are above the theoretical predictions, most are new or an order of magnitude lower than previous limits.
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| Total Pages | : 15 |
| Release | : 2003 |
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Download Search for Rare Charm Meson Decays at FNAL E791 Book in PDF, ePub and Kindle
We report the results of a blind search for flavor-changing neutral current (FCNC), lepton-flavor violating, and lepton-number violating decays of D, D{sub s}, and D° mesons (and their antiparticles) into 2-, 3-, and 4-body states including a lepton pair. Such decays may involve Flavor-Changing Neutral Currents, Leptoquarks, Horizontal Gauge Bosons, or Majorana Neutrinos. No evidence for any of these decays is found. Therefore, we present 90% confidence level branching-fraction upper limits, typically at the 10−4 level. A total of 51 decay channels have been examined; 26 have not been previously reported and 18 are significant improvements over previous results.
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| Release | : 2001 |
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Download Rare and Forbidden Decays of D Mesons Book in PDF, ePub and Kindle
The authors summarize the results of two recent searches for flavor-changing neutral current, lepton-flavor violating, and lepton-number violating decays of D, D{sub s}, and D° mesons (and their antiparticles) into modes containing muons and electrons. using data from Fermilab charm hadroproduction experiment E791, they examined D+ and D{sub s}+ [pi]ll and [Kappa]ll decay modes and the D° dilepton decay modes containing either l+l−, a [rho]°, {bar [Kappa]}*°, 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.
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| Total Pages | : 8 |
| Release | : 2010 |
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Download Updated Search for the Flavor-Changing Neutral-Current Decay $D0̂ \to \mu+̂ \mu-̂$ Book in PDF, ePub and Kindle
We report on a search for the flavor-changing neutral-current decay D° →??− in p{bar p} collisions at √s = 1.96TeV using 360 pb−1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D° candidates in the?+?−,?+?−, and K−?+ decay modes. We use the Cabibbo-favored D° → K−?+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D° →?+?− channel for normalization. We set an upper limit on the branching fraction?(D° →?+?−)
| Author | : David Aaron Pripstein |
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| Total Pages | : 292 |
| Release | : 1997 |
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Download A Search for Flavor Changing Neutral Currents and Lepton Family Number Violation in Neutral Two-body Charm Decays Book in PDF, ePub and Kindle
| Author | : A. Ichiro Sanda |
| Publisher | : World Scientific |
| Total Pages | : 388 |
| Release | : 2001 |
| Genre | : Science |
| ISBN | : 9789810246617 |
Download BCP4 Book in PDF, ePub and Kindle
This book offers the first strong evidence of the existence of CP violation in neutral B decays extracted from sophisticated B factories in the US and Japan. It also holds out the expectation of rare B decays and D, K physics in the near future. In addition, new physics beyond the Standard Model is described. Both experimental and theoretical points of view are given.
