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Showing 1 to 20 of 66 for “"branching ratio"”.
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Measurement of cross section times branching ratio for W boson + photon and Z boson + photon and search for anomalous W boson-photon and Z boson-photon couplings at 1.8 TeV
… of the production cross section times branching ratio for $W + \gamma$ and $Z + \gamma$ processes, where the W decays into a muon and neutrino and the Z decays into a muon pair, have been made from the analysis of 18.6 $\pm$ 0.7 $pb\sp{-1}$ of high-$P\sb{T}$ muon data from …
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ANALYSIS OF THE BOS ? ?+?- DECAY IN THE MSSM
… B meson was reported by the CMS and LHCb collaboration. The small branching ratio inherent to this decay mode makes it highly sensitive for probing physics beyond the SM and we analyze this decay in the framework of the Minimal Supersymmetric Standard Model (MSSM). Complete analytical expressions …
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Search for the B+ → π+e+e− decay with the LHCb experiment
… set weak constraints on the upper limit of the branching ratio. This thesis presents the most precise search to date, using data collected by the LHCb detector from 2011-2018 , corresponding to 9 fb−1 of pp collisions. The B+ → π+e+e− signal is observed with a significance of 3.2σ, constituting …
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Search for new phenomena using three-photon final states in data collected with the ATLAS detector at the Large Hadron Collider
… three photons via fermion and boson loops. The branching ratio for this decay is extremely small (order of $10^{-10}$) in the SM, and has not yet been observed, with the best limits for this branching ratio being of order $10^{-6}$. A secondary goal of this analysis is to search for $Z …
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Observations of new cabibbo suppressed decays of the D meson
… others We have measured a cross section times branching ratio of .035 +-.008 +-.004 nb for the ""color suppressed"" decay D+ -> Phi pi+. We observe a cross section times branching ratio for the decay D+ -> K*Obar K+ to be .011 +-.006 +-.001 nb. Our results indicate a failure of the color …
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Statistical interpretation of exotics monojet data in search of an invisibly decaying Higgs Boson
… results were not unblinded by the ATLAS Collaboration, so toy-data are presented here to demonstrate the procedure. The performance of the statistical framework to be used in the combination of the 7 TeV data with the real 8 TeV data is assessed and is found to perform very well. The results are …
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Observation of structure in the phi phi system produced in radiative J/psi decays
… 2.5 GeV Ie? in addition to the 1'Jc. The product branching ratio B(J/'I/J ---+ i1'Jc) x B(1'Jc ---+ ¢¢) is measured in both final states. The branching ratio to the low mass region, B(J/'I/J ---+ i¢¢ ,m(¢¢) < 2.51 GeV Ie?') is also measured. The angular distribution of the kaons is used to …
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Photoelectron holography of metal adsorbates on semiconductor surfaces
… data acquisition or analysis is discussed. The branching ratio, the photoemission-intensity ratio of two spin-orbit-split components, has been applied to photoelectron holography in a technique called branching-ratio photoelectron holography. This technique permits the removal of the effects of …
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Radiative muon capture on nuclear targets
… The spectrometer was used to measure the RMC branching ratio for AI, Si, Ca, Mo, Sn and Pb. Two recent theoretical models were used to extract the RMC branching ratio in Ca. The experin1ental result is in good agreement with the world average value, but yields a value for the pseudoscalar …
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Measurement of branching factions of d meson with final state including kk
… data at √s =3770 MeV, we measure precisely the branching ratios for four D+ → K+K−X hadronic channels. Our measurement improves the errors of B(D+ → K+K−π+π0) and B(D+ → φπ+π0) by factors of 10 respectively. We report first observation of the decay D+ → φρ+, as well as branching ratio …
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Potassium-Argon Dating
… A40 and Ca40. The rate of decay is a constant ratio, called the branching ratio, and is used to determine the age of a mineral. Because potassium exists almost everywhere this gives us a valuable method for dating rocks. The developments, improvements, procedures, suitable minerals and accuracy …
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Search for the eta c
… upper limit for the eta c cross section tines branching ratio is 23 pb.
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Gamma Veto Detectors in the KOPIO Experiment
… K<sub>L</sub>⁰ → π⁰νν̅. Measurement of the branching ratio of this reaction, depending on the accuracy of the measurement, could be the most precise measurement of the CP-violation parameters of the Standard Model to date. The K<sub>L</sub>⁰ → π⁰νν̅ reaction is exceedingly rare, with an …
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Search For The Decay Ds To Omega L Nu
… with the Cleo-c detector.</p> <p>A limit on the branching ratio Ds to omega e nu is found, at 0.231\%</p> <p>(95\% C.L.).</p>
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Observation of W [right arrow] [mu][nu] decays in proton-antiproton collisions at [square root]s = 1.8 TeV
… criteria are developed. A cross section times branching ratio, based on a sample of three W --+ J-lV candidate events extracted from 27.2 ± 4.1 nb-1 of data taken in the 1987 collider run, is calculated to be which is consistent with current theoretical predictions.
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Measurement of the top quark mass from top quarks produced in proton-proton collisions at √s = 13 TeV that decay to dimuons via a J/ψ
… channel is statistically limited due to the low branching ratio of the b → J/ψ → µ +µ −. The top quark mass is measured from template fits over the m(lepton,J/ψ) distribution. The top quark mass is measured to be 172.03 ± 0.76 (stat) ± 2.14 (syst) GeV.
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Search for CP violation in D-meson decays
… K2 K2 and no -+ 1r+1r-. An upper limit for the branching ratio for the decay, no -+ K-?r+?r0 ?r0 ?r0 , for which evidence was found in the process of measuring Acp, is set at 12.1%.
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Analysis of Excited B Mesons with the OPAL Detector at LEP
… of the two samples, the first measurement of the branching ratio of orbitally-excited B mesons <br>decaying into B* pi (pi) is performed. In the framework of Heavy Quark Symmetry, a fit to the total B pi mass spectrum and a simultaneous fit to the B pi mass spectra of the <br>samples enriched or …
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Analysis of the neutral D-meson decay to a neutral kaon and two neutral pions
… we determine that the D0 to K0S PI0 PI0 branching ratio is 1.059% with a statistical uncertainty of 0.049% and a systematic uncertainty of 0.050%.
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