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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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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Author : Erin E. Abouzaid
language : en
Publisher:
Release Date : 2007

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 has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Kaons categories.

A Measurement Of The Branching Ratio Of The Pi 0 Dalitz Decay Using K L 2 3 Pi 0 Decays From Ktev

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Author :
language : en
Publisher:
Release Date : 2007

A Measurement Of The Branching Ratio Of The Pi 0 Dalitz Decay Using K L 2 3 Pi 0 Decays From Ktev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

The authors present a measurement of B([pi]0 2!e+e-[gamma])/B([pi]0 2![gamma][gamma]) using data taken in 1999 by the E832 KTeV experiment at Fermilab. The [pi]0s were produced by KL decays in flight that are fully reconstructed. They find 63,693 KL 2!3[pi]0 2![gamma][gamma] [gamma][gamma] e+e-[gamma] decays in KTeV data (an increase of a factor of ~ 20 in event statistics over previous experiments), and normalize to KL 2!3[pi]0 2!6[gamma], to extract B([pi]0 2!e+e-[gamma], me+e-> 15 MeV/c2

Measuring The Branching Ratio Of The Rare Decay Pi0 E E

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Author : Rune Niclasen
language : en
Publisher:
Release Date : 2006

Measuring The Branching Ratio Of The Rare Decay Pi0 E E written by Rune Niclasen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

A precise branching ratio measurement of the rare decay {pi}{sup 0} {yields} e{sup +}e{sup -} has been made. The measurement was made with the rare kaon decay experiment KTeV at Fermilab where the source of {pi}{sup 0}s was K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sup 0} decaying in flight. A total of 794 fully reconstructed K{sub L} {yields} 3{pi}{sup 0} events consistent with two of the intermediate {pi}{sup 0}s decaying into {gamma}{gamma} and one into e{sup +}e{sup -} were collected. An estimated 53.2 {+-} 11.0 of these events were expected to be background. Normalizing to the {pi}{sup 0} Dalitz decay they found Br({pi}{sup 0} {yields} e{sup +}e{sup -}, (m{sub e{sup +}e{sup -}}/m{sub {pi}{sup 0}}){sup 2}> 0.95) = (6.44 {+-} 0.25(stat) {+-} 0.22(syst)) x 10{sup -8} where internal radiation, {pi}{sup 0} {yields} e{sup +}e{sup -}({gamma}), was limited by the requirement (m{sub e{sup +}e{sup -}}/m{sub {pi}{sup 0}}){sup 2}> 0.95 which separated it from the tree level Dalitz decay, {pi}{sup 0} {yields} e{sup +}e{sup -}P{gamma}.

A Measurement Of The Branching Ratio Of The 0 Dalitz Decay Using K L U2192 3 0 Decays From Ktev

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Author :
language : en
Publisher:
Release Date : 2007

A Measurement Of The Branching Ratio Of The 0 Dalitz Decay Using K L U2192 3 0 Decays From Ktev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

The authors present a measurement of B(?0 → e+e-?)/B(?0 → ??) using data taken in 1999 by the E832 KTeV experiment at Fermilab. The ?0s were produced by KL decays in flight that are fully reconstructed. They find 63,693 KL → 3?0 → ?? ?? e+e-? decays in KTeV data (an increase of a factor of ̃20 in event statistics over previous experiments), and normalize to KL → 3?0 → 6?, to extract B(?0 → e+e-?, me+e- > 15 MeV/c2/sup)/B(?sup0 → ??) = (3.920 ± 0.016 ± 0.036) x 10sup-3/sup, where the first error is statistical and the second is systematic. Using the Mikaelian and Smith prediction for the esup+/supesup-/sup mass spectrum as implemented in the KTeV Monte Carlo to correct to the full esup+/supesup-/sup mass range yields B(?sup0/sup → esup+/supesup-/sup?)/B(?sup0

Final Results From The Ktev Experiment On The Decay K L Pi0 Gamma Gamma

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Author :
language : en
Publisher:
Release Date : 2008

Final Results From The Ktev Experiment On The Decay K L Pi0 Gamma Gamma written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

The authors report on a new measurement of the branching ratio B(K{sub L} → [pi]°[gamma][gamma]) using the KTeV detector. They reconstruct 1982 events with an estimated background of 608, that results in B(K{sub L} → [pi]°[Gamma][gamma]) = (1.29 ± 0.03{sub stat} ± 0.05{sub syst}) x 10−6. They also measure the parameter, a{sub V}, which characterizes the strength of vector meson exchange terms in this decay. They find a{sub V} = -0.31 ± 0.05{sub stat} ± 0.07{sub syst}. These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and a{sub V}.

Measurement Of Neutral B Decay Branching Fractions To K Sub S Sup 0 Pi Sup Pi Sup Final States

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of Neutral B Decay Branching Fractions To K Sub S Sup 0 Pi Sup Pi Sup Final States written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

The branching fractions for B[sup 0] --> K[sup 0][pi][sup +][pi][sup -], B[sup 0] --> K*[sup +][pi][sup -] and B[sup 0] --> D[sup -]( --> K[sub s][sup 0][pi][sup -])[pi][sup +] decaying to a K[sub s][sup 0][pi][sup +][pi][sup -] state have been measured and agree with previous measurements. The direct CP violating parameter A[sub K*[pi]] was measured for the decay B[sup 0] --> K*[sup +][pi][sup -] and is in agreement with the CLEO measurement, with no evidence of CP violation with the statistics used. Using larger datasets, one can extract amplitudes and relative phases of the resonant contributions to the Dalitz plot, with the possibility to observe new B-meson decays.

Observation Of The Branching Ratio Of The Decay K Subscript L 0 Arrow Leads To Right Mu Mu

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Author : Eric Lee Schwartz
language : en
Publisher:
Release Date : 1974

Observation Of The Branching Ratio Of The Decay K Subscript L 0 Arrow Leads To Right Mu Mu written by Eric Lee Schwartz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Branching ratios (Nuclear physics) categories.

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0

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Author :
language : en
Publisher:
Release Date : 2008

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

The authors report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K{sup ±}?{sup {-+}}?°. With a sample of (231.8 ± 2.6) x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B° and {bar B}° decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be?(B° → K?−?°) = (35.7{sub -1.5}{sup +2.6} ± 2.2) x 10−6, and?{sub CP} = -0.030{sub -0.051}{sup +0.045} ± 0.055 where the first errors are statistical and the second systematic. They observe the decay B° → K*°(892)?° with the branching fraction?(B° → K*°(892)?°) = (3.6{sub -0.8}{sup +0.7} ± 0.4) x 10−6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B° → {bar D}°?° decays where {bar D}° → K+?−, and they measure?(B° → {bar D}°?°) = (2.93 ± 0.17 {+-} 0.18) x 10−4.

A Measurement Of The Branching Ratio K Subscript L 0 Right Arrow 2 Pi Symbol 0

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Author : William Parker Oliver
language : en
Publisher:
Release Date : 1969

A Measurement Of The Branching Ratio K Subscript L 0 Right Arrow 2 Pi Symbol 0 written by William Parker Oliver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.

Measurement Of The Branching Ratio And The Form Factor Of The Decay K Subscript L Arrow E E Gamma

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Author : Matthew David Needham
language : en
Publisher:
Release Date : 1999

Measurement Of The Branching Ratio And The Form Factor Of The Decay K Subscript L Arrow E E Gamma written by Matthew David Needham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.