Search for Flavor Changing Neutral Current Decays of Charm Mesons
Author: Nicholas James Witchey
Publisher:
Published: 1996
Total Pages: 326
ISBN-13:
DOWNLOAD EBOOKPosts
A Search for Flavour Changing Neutral Current Processes in Decays of Charmed Mesons
Author:
Publisher:
Published: 1987
Total Pages:
ISBN-13:
DOWNLOAD EBOOKNeutral 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.
Search for Rare Charm Meson Decays at FNAL E791
Author:
Publisher:
Published: 2003
Total Pages: 15
ISBN-13:
DOWNLOAD EBOOKWe 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.
A Search for Flavor Changing Neutral Currents and Lepton Family Number Violation in Neutral Two-body Charm Decays
Author: David Aaron Pripstein
Publisher:
Published: 1997
Total Pages: 292
ISBN-13:
DOWNLOAD EBOOKSearch for Rare and Forbidden Charm Meson Decays at Fermilab E791
Author:
Publisher:
Published: 2000
Total Pages:
ISBN-13:
DOWNLOAD EBOOKThe authors report the results of a blind search 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 examine the [pi]ll and Kll decay modes of D+ and D{sub s}+ and the l+l− decay modes of D°. No evidence for any of these decays is found. Therefore, they present branching-fraction upper limits at 90% confidence level for the 24 decay modes examined. Eight of these modes have no previously reported limits, and fourteen are reported with significant improvements over previously published results.
A Search for Flavor Changing Neutral Currents and Lepton Family Number Violation in Neutral Two-body Charm Decays
Author:
Publisher:
Published: 2001
Total Pages:
ISBN-13:
DOWNLOAD EBOOKThis work presents a search for three rare/forbidden neutral charm decays, D[sup 0][yields][mu]e, D[sup 0][yields][mu][mu], and D[sup 0][yields] ee. This study was based on data collected in Experiment E789 at the Fermi National Accelerator Laboratory using 800 GeV/c proton-gold interactions. Two statistical analyses are presented, one with background subtraction and the other without background subtraction. No evidence is found for any of the decays and the following upper limits are presented at the 90% confidence level.
Search for Flavor-changing-neutral-current D Meson Decays
Author:
Publisher:
Published: 2007
Total Pages: 7
ISBN-13:
DOWNLOAD EBOOKWe 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+ →?+?+?−)
Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector
Author: Shota Tsiskaridze
Publisher: Springer
Published: 2017-08-02
Total Pages: 248
ISBN-13: 3319634143
DOWNLOAD EBOOKThis PhD thesis focuses on the search for flavor-changing neutral currents in the decay of a top quark to an up-type quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to bb. Further, the thesis presents the combination of this search for top quark pair events with other ATLAS searches – in the course of which the most restrictive bounds to date on tqH interactions were obtained. Following on from the discovery of the Higgs boson, it is particularly important to measure the Yukawa couplings of the Standard Model fermions; these parameters may provide crucial insights to help solve the flavor puzzle and may help reveal the presence of new physics before it is directly observed in experiments.
Search for the Flavor Changing Neutral Current Decay T --> Zq at [the Square Root Of] S
Author: Jennifer Lindsay Gimmell
Publisher:
Published: 2009
Total Pages: 270
ISBN-13:
DOWNLOAD EBOOKB / K Decays and Novel Flavor Factories
Author: David Cline
Publisher: American Institute of Physics
Published: 1992
Total Pages: 280
ISBN-13:
DOWNLOAD EBOOKFrom a February 1991 conference in Santa Monica, California, 22 papers by particle, theoretical, and accelerator physicists discuss flavor physics and novel flavor factories (aspects of the subatomic world). CP violation and the search for flavor-changing weak neutral currents are covered extensivel
