Flavor Changing Kaon Decays From Hypercp Measurements Of The K Pi Mu Mu Branching Ratios PDF Download
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Release | : 2004 |
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Download Flavor Changing Kaon Decays from Hypercp: Measurements of the K+ ---] Pi+- Mu+ Mu- Branching Ratios Book in PDF, ePub and Kindle
The Fermilab HyperCP collaboration is making precision studies of charged hyperon and kaon decays, as well as searches for rare and forbidden hyperon and kaon decays. We report here on measurements of the branching ratios of the flavor-changing neutral-current decays: K[sup[+-]][yields][pi][sup[+-]][mu][sup+][mu][sup -], and compare our results to theoretical predictions. This is the first observation of the K[sup -][yields][pi][sup -][mu][sup+][mu][sup -] decay.
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Total Pages | : 5 |
Release | : 2001 |
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Download A Measurement of the Branching Ratio of K+-- -]pi+--mu+mu- Decays in the Hyper CP Experiment Book in PDF, ePub and Kindle
Large samples of hyperon and kaon decays were collected with the Hyper CP spectrometer during two fixed-target runs at Fermilab. Based on an analysis of 110 million K pm decays from the 1997 data sample we present a branching ratio for K pm right arrow pi pm mu+ mu-. This is the first observation of K- right arrow pi- mu+ mu- decay.
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Release | : 1988 |
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Download Search for the Decay K. --]. Pi. . Mu. +e Book in PDF, ePub and Kindle
A search for the lepton-flavor violating decay K.--> pi.mu.+e− has been performed. Measurements have also been made of the branching ratio and decay particle distributions for the decay K+.--> pi.+e−. A description of the measurement technique, and preliminary results are presented. 6 refs., 5 figs.
Author | : Erin E. Abouzaid |
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Total Pages | : 328 |
Release | : 2007 |
Genre | : Kaons |
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Download A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K[subscript]L [arrow] 3[pi]0 Decays from KTeV Book in PDF, ePub and Kindle
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Total Pages | : 21 |
Release | : 2013 |
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Download New Measurement of the Charged Kaon Semileptonic $K\̂pm \to \pi ̂\pi-̂ E\̂pm\nu$ ($K_E4$) Decay Branching Ratio and Hadronic Form Factors Book in PDF, ePub and Kindle
Author | : T. Inagaki |
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Release | : 1991 |
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Download Measurement of the Branching Ratio of the Decay K 0 L --> [my][my] Book in PDF, ePub and Kindle
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Total Pages | : 10 |
Release | : 1990 |
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Download Search for the Flavor-changing Neutral Current Decay K Sup + Yields. Pi. Sup +. Nu. Nu Book in PDF, ePub and Kindle
The observation that flavor-changing neutral currents (FCNC) in weak decays are highly suppressed was first explained by Glashow, Iliopoulos and Maiani in 1970, and their idea has since become a cornerstone of the Standard Model. They proposed a model of the weak interaction that included a then new fourth quark and which, in a natural way, allowed the existence of a neutral vector boson without inducing FCNC's at tree level. Thus the couplings of the neutral intermediary{hor ellipsis}cause no embarrassment.'' In higher order through, decays like K →?l{bar l} can proceed. Measurements of such processes provide a detailed test of the Standard Model since definite predictions for their rates can be calculated. Conversely, if no contradictions are found and the standard model is assumed to describe the physics, measurements limit the allowed values of the parameters of the model. As is often the case in studying processes that are highly suppressed and heretofore unseen, improvements in the sensitivity of experiments allow the possibility for the discovery of new physics that exhibits a similar experimental signature. This paper describes experiment 787 at Brookhaven which is expected to address some of these issues. The status and future of the experiment will be described here. The main goal of E787 is to measure the rate of K →?+?{bar {nu}} at the standard model level. In addition, the experiment has sensitivity to other FCNC decays of the charged kaon, in particular the decays K+ →?+?+?− and K+ →?+??
Author | : Robert D. Cousins |
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Total Pages | : 318 |
Release | : 1981 |
Genre | : Kaons |
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Download A Measurement of the Rate of Formation of Pi-mu Atoms in K0 [subscript] L Decay Book in PDF, ePub and Kindle
Author | : Mehran Ardebili |
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Total Pages | : 294 |
Release | : 1995 |
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Download Measurement of the K --> [pi]+[mu]+[mu]− Branching Ratio Book in PDF, ePub and Kindle
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Release | : 2002 |
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Download Rare Kaon Decays Book in PDF, ePub and Kindle
The subject of rare and ultra-rare kaons decays is very active at this time with 8 experiments from 4 labs reporting new results recently and 6 new experiments recently approved. The physics topics under study include flavor changing neutral currents (FCNC), measurements of direct and indirect CP violation and searches for lepton flavor violation (LFV). These measurements are all characterized by very high sensitivities, studying modes with branching ratios in the 10−7--10−12 range with single event sensitivities approaching 10−12. This is a region of sensitivity beyond the reach of charm and B experiment, at least for now. The development of beams with fluxes well above 1MHz of kaon decays enable these experiments. In this paper the author covers some of the important new results and the goals for the new experiments.