Inclusive Lambda C Production In E E Annihilations At Sqrt S

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High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1987

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Nuclear physics categories.

Government Reports Announcements Index

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Author :
language : en
Publisher:
Release Date : 1982-06

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982-06 with Science categories.

Lambda Production In Ee Annihilations At 29 Gev

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Author :
language : en
Publisher:
Release Date : 1986

Lambda Production In Ee Annihilations At 29 Gev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

This paper presents measurements of the inclusive production cross sections of .lambda. baryons in ee− annihilations at .sqrt.s = 29 GeV. The data sample corresponds to an integrated luminosity of 256 pb−1 collected with the High Resolution Spectrometer at PEP. Comparisons are made to the predictions of the Lund model. The data are well described using a strange diquark suppression parameter, (us/ud)/(s/d), of 0.89 +- 0.10/sub -0.16//sup +0.56/, and the measured .lambda./sub c/ .-->. .lambda. + X branching ratio of 23 +- 10%. No polarization is observed in the .lambda. decays. 17 refs., 5 figs.

Inis Atomindex

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Author :
language : en
Publisher:
Release Date : 1978

Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Nuclear energy categories.

Inclusive Lambda C Production In E E Annihilations At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2006

Inclusive Lambda C Production In E E Annihilations At Sqrt S written by 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.

We present measurements of the total production rates and momentum distributions of the charmed baryon [Lambda]{sub c} in ee− 2!hadrons at a center-of-mass energy of 10.54 GeV and in [Upsilon](4S) decays. In hadronic events at 10.54 GeV, charmed hadrons are almost exclusively leading particles in e+e− 2!c{bar c} events, allowing direct studies of c-quark fragmentation. We measure a momentum distribution for [Lambda]{sub c}+ baryons that differs significantly from those measured previously for charmed mesons. Comparing with a number of models, we find none that can describe the distribution completely. We measure an average scaled momentum of (x{sub p}) = 0.574 ± 0.009 and a total rate of N{sub [Lambda]{sub c}}{sup q{bar q}} = 0.057 ± 0.002(exp.) ± 0.015(BF) [Lambda]{sub c}+ per hadronic event, where the experimental error is much smaller than that due to the branching fraction into the reconstructed decay mode, pK− [pi]+. In [Upsilon](4S) decays we measure a total rate of N{sub {Lambda}{sub c}}{sup [Upsilon]} = 0.091 ± 0.006(exp.) ± 0.024(BF) per {Upsilon}(4S) decay, and find a much softer momentum distribution than expected from B decays into a {Lambda}{sub c}+ plus an antinucleon and one to three pions.

Inclusive P Production Pi Production By E E Ee Annihilation At 34 6 Gev Center Of Mass Energy

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Author : Deutsches Elektronen-Synchrotron (Hamburg)
language : de
Publisher:
Release Date : 1986

Inclusive P Production Pi Production By E E Ee Annihilation At 34 6 Gev Center Of Mass Energy written by Deutsches Elektronen-Synchrotron (Hamburg) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Inclusive Production Pi Production By E E Ee Annihilation At 34 6 Gev Center Of Mass Energy

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Author :
language : de
Publisher:
Release Date : 1986

Inclusive Production Pi Production By E E Ee Annihilation At 34 6 Gev Center Of Mass Energy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Measurement Of Inclusive Gamma Pi And Eta Production In E E Annihilation At Square Root Of Sigma

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Author : CELLO Collaboration
language : en
Publisher:
Release Date : 1989

Measurement Of Inclusive Gamma Pi And Eta Production In E E Annihilation At Square Root Of Sigma written by CELLO Collaboration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Inclusive Charmed Baryon Lambda C And Sigma C Production In B Meson Decays

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Author : Michael Manfred Zoeller
language : en
Publisher:
Release Date : 1994

Inclusive Charmed Baryon Lambda C And Sigma C Production In B Meson Decays written by Michael Manfred Zoeller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.

Semileptonic Lambda

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Author :
language : en
Publisher:
Release Date : 1988

Semileptonic Lambda written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

Semileptonic .lambda./sub c/ decays have been observed in 29 GeV ee/sup /minus/ annihilation. We observe the channels .lambda./sub c//sup +/ .-->. e/sup +/.lambda. X and .lambda./sub c//sup +/ .-->. .mu mu lambda. X. The production rate for .lambda./sub c//sup +/, times Br(.lambda./sub c/ .-->. l/sup +/.lambda. X) of 0.0031 +- 0.0012 +- 0.0010 per hadronic event for electrons, and 0.0024 +- 0.0007 per hadronic event for muons. When combined with the Lund model prediction for .lambda./sub c//sup +/ production, this gives semileptonic branching ratios of roughly 5% about what is expected. When combined with the UCLA model prediction for .lambda./sub c//sup +/ production, this gives semileptonic branching ratios of 17% and 13% for electrons and muons, somewhat higher than expected.