Flavor Changing Kaon Decays from Hypercp: Measurements of the K+ ---] Pi+- Mu+ Mu- Branching Ratios

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Book Synopsis Flavor Changing Kaon Decays from Hypercp: Measurements of the K+ ---] Pi+- Mu+ Mu- Branching Ratios by :

Download or read book Flavor Changing Kaon Decays from Hypercp: Measurements of the K+ ---] Pi+- Mu+ Mu- Branching Ratios written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

A Measurement of the Branching Ratio of K+-- -]pi+--mu+mu- Decays in the Hyper CP Experiment

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Total Pages : 5 pages
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Book Synopsis A Measurement of the Branching Ratio of K+-- -]pi+--mu+mu- Decays in the Hyper CP Experiment by :

Download or read book A Measurement of the Branching Ratio of K+-- -]pi+--mu+mu- Decays in the Hyper CP Experiment written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Search for the Decay K. --]. Pi. . Mu. +e

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Book Synopsis Search for the Decay K. --]. Pi. . Mu. +e by :

Download or read book Search for the Decay K. --]. Pi. . Mu. +e written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K[subscript]L [arrow] 3[pi]0 Decays from KTeV

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Total Pages : 328 pages
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Book Synopsis A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K[subscript]L [arrow] 3[pi]0 Decays from KTeV by : Erin E. Abouzaid

Download or read book A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K[subscript]L [arrow] 3[pi]0 Decays from KTeV written by Erin E. Abouzaid and published by . This book was released on 2007 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

New Measurement of the Charged Kaon Semileptonic $K\̂pm \to \pi ̂\pi-̂ E\̂pm\nu$ ($K_E4$) Decay Branching Ratio and Hadronic Form Factors

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ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis New Measurement of the Charged Kaon Semileptonic $K\̂pm \to \pi ̂\pi-̂ E\̂pm\nu$ ($K_E4$) Decay Branching Ratio and Hadronic Form Factors by :

Download or read book New Measurement of the Charged Kaon Semileptonic $K\̂pm \to \pi ̂\pi-̂ E\̂pm\nu$ ($K_E4$) Decay Branching Ratio and Hadronic Form Factors written by and published by . This book was released on 2013 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Measurement of the Branching Ratio of the Decay K 0 L --> [my][my]

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Book Synopsis Measurement of the Branching Ratio of the Decay K 0 L --> [my][my] by : T. Inagaki

Download or read book Measurement of the Branching Ratio of the Decay K 0 L --> [my][my] written by T. Inagaki and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for the Flavor-changing Neutral Current Decay K Sup + Yields. Pi. Sup +. Nu. Nu

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Total Pages : 10 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Search for the Flavor-changing Neutral Current Decay K Sup + Yields. Pi. Sup +. Nu. Nu by :

Download or read book Search for the Flavor-changing Neutral Current Decay K Sup + Yields. Pi. Sup +. Nu. Nu written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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+ →?+??

A Measurement of the Rate of Formation of Pi-mu Atoms in K0 [subscript] L Decay

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ISBN 13 :
Total Pages : 318 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis A Measurement of the Rate of Formation of Pi-mu Atoms in K0 [subscript] L Decay by : Robert D. Cousins

Download or read book A Measurement of the Rate of Formation of Pi-mu Atoms in K0 [subscript] L Decay written by Robert D. Cousins and published by . This book was released on 1981 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Measurement of the K --> [pi]+[mu]+[mu]− Branching Ratio

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ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (323 download)

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Book Synopsis Measurement of the K --> [pi]+[mu]+[mu]− Branching Ratio by : Mehran Ardebili

Download or read book Measurement of the K --> [pi]+[mu]+[mu]− Branching Ratio written by Mehran Ardebili and published by . This book was released on 1995 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Rare Kaon Decays

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Book Synopsis Rare Kaon Decays by :

Download or read book Rare Kaon Decays written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Measurement of Branching Ratios and CP Asymmetries for the Decays B0 → Π+π- [pi + Pi -], B0 → K+π- [K + Pi -], B0 → K+K-

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Total Pages : 234 pages
Book Rating : 4.:/5 (118 download)

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Book Synopsis Measurement of Branching Ratios and CP Asymmetries for the Decays B0 → Π+π- [pi + Pi -], B0 → K+π- [K + Pi -], B0 → K+K- by : Kolja Andreas Prothmann

Download or read book Measurement of Branching Ratios and CP Asymmetries for the Decays B0 → Π+π- [pi + Pi -], B0 → K+π- [K + Pi -], B0 → K+K- written by Kolja Andreas Prothmann and published by . This book was released on 2012 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Measurement of K+ Decay Branching Ratios

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ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Measurement of K+ Decay Branching Ratios by : Andrew Charles Callahan

Download or read book Measurement of K+ Decay Branching Ratios written by Andrew Charles Callahan and published by . This book was released on 1965 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

EXPERIMENTAL STATUS OF K YIELDS PVV-.

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Book Synopsis EXPERIMENTAL STATUS OF K YIELDS PVV-. by :

Download or read book EXPERIMENTAL STATUS OF K YIELDS PVV-. written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental program for the study of the rare kaon decays, K+[pi][nu][bar[nu]] is summarized. A review of recent results is provided along with a discussion of prospects for the future of this program. The primary focus of the world-wide kaon program is the two golden modes: K[sup+][yields][pi][sup+][nu][bar[nu]] and K[sub L][sup o][yields][pi][sup o][nu][bar[nu]]. The first step in an ambitious program to precisely measure both branching ratios has been successfully completed with the observation of two K[sup+][yields][pi][sup+][nu][bar[nu]] events by E787. The E949 experiment is poised to reach an order of magnitude further in sensitivity and to observe[approx]10 Standard Model events, and the CKM experiment should observe[approx]100 SM events by the end of this decade. Limits on the neutral analog K[sub L][sup o][yields][pi][sup o][nu][bar[nu]] have been set by KTeV and within the next couple of years will be pushed by E391a. Measurements of the branching ratio should be made within the next 10 years by KOPIO, with a goal of[approx]50 events, and at the JHF, with a goal of up to 1000 events.

Radiative Decays of K

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Book Synopsis Radiative Decays of K by :

Download or read book Radiative Decays of K written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In an experiment at the Brookhaven National Laboratory AGS a number of radiative decays of the K°/sub L/(..pi ... pi..−..gamma.., ee−..gamma.. and ..mu..+..mu..−..gamma..) were studied. The charged particles from these decays were detected in a 5000 wire proportional chamber spectrometer and the gammas were detected in a 194 element lead glass Cherenkov counter array. Preliminary results, based on approximately 25 percent of our total data sample, are as follows: The branching ratio K°/sub L/ yields ..pi pi gamma..(direct)/K°/sub L/ yields all = 5.5 /sup +/- 1.0 x 10−5. One example of the previously unobserved decay K°/sub L/ yields ee..gamma.. was found, yielding a branching ratio of 8.3 +- 8.3 x 10−6. No examples of the decays K°/sub L/ yields ..mu mu gamma.., ee..pi..°, and Z/sup +/..mu mu pi..° were found, yielding improved upper limits of K°/sub L/ yields ..mu mu gamma../K°/sub L/ yields all

Rare K-decay Experiments

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ISBN 13 :
Total Pages : pages
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Book Synopsis Rare K-decay Experiments by :

Download or read book Rare K-decay Experiments written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There have been a proposal (accepted - E777) and a letter-of-intent to search for K .-->. .pi.mu.+e− to a branching ratio better than 10−11. This motivation is to test different types of lepton number conservation - specifically, there is a boson in technicolor models which would allow such decays at a level around 10−1°. This note discusses the E777 experiment, reasons for doing the experiment at the AGS, and the prospects for looking for even smaller branching ratios. A level of B.R. 4.8 x 10−9 (90% C.L.) for K+ .--. .pi.+.mu.+e− was achieved in a CERN experiment designed to study Ke4 decay. That experiment used a separated 8 x 104/pulse K+ beam with a PWC/spark chamber detector and no muon identification. E777 will use an unseparated beam with 2 x 107K/sup +//pulse, PWCs, and muon identification. Cherenkovs will be designed to not misidentify particles, at a reduced efficiency. For example, two counters will be filled with H2 gas at atmospheric pressure to identify electrons. This reduces delta-ray contamination, at a cost of reduced efficiency for identifying the electrons. They chose a K/sup +/ momentum of 6 Gev/c (and, thus, to do the experiment at the AGS) for good particle identification.

New Measurement of the K+- \to Pi+-Mu+Mu- Decay

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Total Pages : 9 pages
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Book Synopsis New Measurement of the K+- \to Pi+-Mu+Mu- Decay by :

Download or read book New Measurement of the K+- \to Pi+-Mu+Mu- Decay written by and published by . This book was released on 2013 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Study of the Decay K(L) -] Pi+- E-+ Nu E+ E- to Probe the Semileptonic K-pi Structure

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ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Study of the Decay K(L) -] Pi+- E-+ Nu E+ E- to Probe the Semileptonic K-pi Structure by : Katsushige Kotera

Download or read book Study of the Decay K(L) -] Pi+- E-+ Nu E+ E- to Probe the Semileptonic K-pi Structure written by Katsushige Kotera and published by . This book was released on 2006 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors observed a new neutral kaon decay mode, K{sub L} {yields} {pi}{sup {+-}}e{sup {-+}}{bar {nu}}e{sup +}e{sup -} for the first time. Based on the 20225 events including 1018 {+-} 25 background events, they determined the branching ratio, B(K{sub L} {yields} {pi}{sup {+-}}e{sup {-+}}{bar {nu}}e{sup +}e{sup -}; M{sub e{sup +}e{sup -}}> 5 MeV/c{sup 2}, E*{sub e{sup +}e{sup -}}> 30 MeV) = (1.281 {+-} 0.041) x 10{sup -5}. This branching ratio agrees with a theoretical prediction based on the chiral perturbation theory ({chi}PT) calculation at {Omicron}(p{sup 4}). Most of the kinematical distributions agree with the {chi}PT {Omicron}(p{sup 4}) calculation. They also measured one of the low energy coupling constants for the {chi}PT {Omicron}(p{sup 4}), L{sub 9}{sup r} = (8.0 {+-} 1.6) x 10{sup -3}. The M{sub e{sup +}e{sup -}} distribution below 100 MeV showed a 3 {sigma} deviation from the {chi}PT {Omicron}(p{sup 4}) calculation. This requires further studies in theory and experiments.